A Brief History of Batteries and Stored Energy
I thought that having worked around batteries of all types, shapes and sizes since 1984, that I knew just about all there was to know about them. I also thought that it would be easy to put this article together in the short time I was given to do so. I was wrong on both counts. Due to the limit on the size of this article I was not able to expound much on any one achievement. I found that different references conflicted slightly on the time line and those instances have been referenced and noted.
250 B.C. In the late 1930’s several earthenware jars supposedly made as far back as 250 B.C., were unearthed during excavations at Khujut Rabu near Baghdad. The typical jar was 5-1/2 inches tall and contained a copper cylinder, with its bottom capped by a copper disk and sealed with bitumen or asphalt. An iron rod was suspended from an asphalt stopper at the top of the copper cylinder into the center of the cylinder. The rod showed evidence of having been corroded with an acidic agent such as wine grape juice or vinegar. German Archaeologist Dr. Wilhelm Konig theorized that these clay jars were galvanic cells or batteries supposedly used for gilding copper with silver by electroplating. To help support this theory König also found copper vases plated with silver dating from earlier periods. However some believe that these jars were also used for electroplating jewelry with gold, or were used as an electro acupuncture device, or even to store sacred scrolls[1].

1651 German chemist Johann Rudolf Glauber in his "Practice on Philosophical Furnaces" describes a safety valve for use on chemical retorts. Today we use Glauber's valve as the basis for the pressure vents on sealed batteries to prevent rupture of the cells when the pressure rises[2].
1681 French physicist and inventor Denis Papin is credited with the invention of the pressure release valve prevent explosions in pressure vessels, although safety valves had in fact been described by Glauber thirty years earlier[3].
1745 Dutch physicist and mathematician Pieter van Musschenbroek and his student Andreas Cunaeus working in Leyden, Holland are the first to store electricity in a bottle they call it the Leyden Jar. A similar device was also invented at the same time by Ewald Jurgens Von Kleist Dean of the Cathedral of Kammin in Germany. This is really a large capacitor whose design was improved by English astronomer John Bevis in 1747[4].
Mid 1700s Carpatho-German mathematician physicist and doctor at the University of Göttingen Johann Andreas Segner invented a reactive water turbine the Segner-wheel, still produced today for use in small hydro sites[5].
1752 Johann Georg Sulzer discovers what is to be known later as the battery tongue test when he notices a tingling sensation when he puts two dissimilar metals, just touching each other, on either side of his tongue[6].
1752 Benjamin Franklin invented the lightning rod, proposed a "fluid" theory of electricity and outlined the concepts and language to describe them, like positively & negatively charged current flow, conductors, armature, electric shock, electrician and battery which we still use today[7].
1757 French botanist Michel Adanson proposes a new theory that the discharge from the Senegalese (electric) catfish could be compared with the discharge from a Leyden jar. The ability of certain fish, eels or sting rays to inflict electric shocks had been known since antiquity[8].
1759 German mathematician Franz Maria Ulrich Theodosius Aepinus published his book, An Attempt at a Theory of Electricity and Magnetism[9].
1772 John Walsh proves Michel Adanson's theory by drawing a spark from an electric eel. It is quite possible that news of Walsh's experiment influenced Galvani to begin his own experiments with frogs[10].
1786 Professor of anatomy at Bologna Academy of Science in Italy, Luigi Galvani demonstrated what we now understand to be the electrical basis of nerve impulses from his experiments with dead frogs[11].
1800 - Alessandro Volta of the University of Pavia, Italy invented the voltaic pile and discovered the first practical method of storing/generating electricity[12].
1800 English scientists, William Nicholson and Anthony Carlisle, experimenting with Volta's chemical battery accidentally discovered electrolysis and initiated the science of electrochemistry[13].
1803 German physicist Johann Wilhelm Ritter first demonstrated the elements of a rechargeable battery and was one of the first to identify polarization. Unfortunately there was no practical way to recharge it other than from a Voltaic Pile until someone invented a charger many years later[14].
1807 Humphry Davy with over 250 cells made the largest battery ever built at the time to isolate compounds in various solutions. The next year Davy used his batteries to create and arc lamp[15].
1812 Venetian priest and physicist Giuseppe Zamboni develops the first high voltage leak proof "dry" batteries or Zamboni pile with terminal voltages of over 2000 Volts. Though not much current was available (about 10-9 amps) they were able to hold a charge for fifty years before complete discharge[16].
1816 British chemist William Hyde Wollaston builds a system that allows him to hoist the costly metal plates out of the electrolyte in the cells. This was the forerunner of the reserve battery and a system copied by many battery makers in the nineteenth century[17].
1820 American chemist Robert Hare by using spiral wound electrodes increased surface area and develops high current galvanic batteries[18].
1821 Prussian physicist Thomas Johann Seebeck discovers a voltage existed between the two ends of a metal bar when one end was cooled and the other heated. This is a thermoelectric effect now called the Seebeck effect or the Peltier-Seeback effect and is the basis of thermocouples and thermopiles that creates electrical heating elements.[19]
1828 French physiologist and biologist René Joachim Henri Dutrochet discovers osmosis using a semi permeable membrane[20].
1828 French engineer Claude Bourdin coined he word turbine derived from the Latin word for "whirling" or a "vortex". The main difference between early water turbines and water wheels is a swirl component of the water which passes energy to a spinning rotor[21]
1832 Michael Faraday of the Royal Institution in London used a copper disc rotating between the poles of a horseshoe magnet to produced a small direct current called the Faraday disc[22].
1836 British chemist John F. Daniel is credited with in inventing the first non-polarizing cell when he invented the Daniel Cell which used two electrolytes and was very similar to the Constant Current Cell developed by French physicist Antoine-César Becquerel in 1829[23].
1839 to 1842 - Inventors Sir William Robert Grove and Bunsen created improvements to batteries that used liquid electrodes to produce electricity. Bunsen (1842) and Grove (1839) invented the most successful[24].
1853 Moses Gerrish Farmer patented an improved battery[25].
1859-1860 French inventor, Gaston Plante developed the first practical rechargeable lead acid battery. This type of battery is primarily used in cars today[26].
1866-1868 French railway engineer Georges Leclanché develops the first practical battery product to be commercialized the Leclanché cell[27].
1872 British electrical engineer Josiah Latimer Clark invents the Clark Standard Cell[28].
1874 A Frenchman named M Clamond develops the thermo-electric battery called the Clamond pile or thermopile based on the Seebeck effect[29].
1879 British inventor Henry Albert Fluess developed a “closed circuit” system that was called at the time the rebreather[30]
1880 Frenchman Emile Alphonse Fauré patented pasted plates for manufacturing lead-acid batteries[31].
1881 J.A. Thiebaut improves the Leclanché cell and patents the first battery with both the negative electrode and porous pot placed in a zinc cup[32].
1881 - Carl Gassner invented the zinc-carbon cell that became the first commercially successful dry cell battery[33].
1882 French chemists Felix de Lalande and Georges Chaperon develop the first alkaline electrolyte, the Lalande-Chaperon Cell[34].
1892 British born American chemist Edward Weston invented and patented the saturated cadmium cell known as the Weston Standard Cell[35].
1896 American engineer William W. Jacques develops a carbon battery[36].
1897 German researcher W. Peukert developed the empirical law C = I n T known as the Puekert Equation. That states the faster a battery is discharged the lower its available capacity[37].
1899 Waldmar Jungner invented the first nickel-cadmium rechargeable battery[38].
1900-1901 American Thomas Edison patents an alkaline rechargeable cell the Nickel Iron (NiFe) battery[39].
1901 Russian Michaelowski patented for the rechargeable Nickel Zinc battery[40].
1910 Berlin, Germany, Dr. Theodor Sonnenschein (former student of Max Plank); founded the factory Akkumulatorenfabrik Sonnenschein to manufacture vented batteries for traction automotive[41].
1915 Willard Storage Battery Company improves automotive lead batteries with plate separators and hard rubber cases[42].
1915 French physicist Charles Fery developed an alternative air depolarizing battery[43].
1926 Sonnenshein becomes OEM supplier to car industry[44].
1932 English mechanical engineer Francis Thomas Bacon develops the First practical Fuel Cell system[45].
1934 Elektrotechnische Fabrik Sonneberg in Germany was the first to manufacture lead acid batteries with a gelled seal[46].
1938 Sonnenschein opens new factory in Berlin[47].
1939 US Navy coined the acronym SCUBA set for Self Contained Underwater Breathing Apparatus) to refer it to their military diver’s rebreather sets[48].
1941 American inventor B.N. Adams filed for a patent on the water activated battery, it was awarded in 1943[49].
1942 Frenchmen Emile Gagnan and Jacques Cousteau develop the first open-circuit SCUBA diving originally called the Aqua-lung[50].
1944 American independent inventor Samuel Ruben developed the mercury button cell. This was licensed to a company owned by Philip Rogers Mallory. Ruben and Mallory went on to found the Duracell Company[51].
1946 Sonnenschein opens new factory in Budingen[52].
1947 Frenchman Neumann develops a seal for the nickel-cadmium battery enabling a practical recombinant system[53].
1949 Canadian Lew Urry invented the small alkaline battery[54].
1951 American Philip Edwin Ohmart of Cincinnati, Ohio, invents the first nuclear battery which converts radioactive energy directly to electrical energy[55].
1954 Gerald Pearson, Calvin Fuller and Daryl Chapin invented the first solar battery[56].
1957 German Otto Jache working at Sonnenschein Battery patented and started the production of the first recombinant “dryfit” Gel SLA or VRLA Battery[57].
1959 Canadian Lew Urry patented the first modern primary Alkaline battery. The battery we know was introduced by Ever Ready and Duracell between 1968 and 1970[58].
1964 Russian Dr. N.V.Geulia patented the first super flywheel battery[59].
1971 American research engineer Henry Thomas Sampson patents the Gamma Electric Cell[60].
1978 Huntorf, Germany even though the Compressed Air Energy Storage (CAES) technology had been in use for over 20 years, this is the first CAES plant, a 290 MW facility[61].
1979 American researcher John B. Goodenough working at Oxford university perfects Lithium-ion rechargeable battery technology[62].
1980 UK Atomic Energy Authority in Harwell Patents the first Zebra Sodium/Nickel chloride cell[63].
1980 The high power density, deep cycling Absorptive Glass Mat or AGM lead acid battery is invented and Sealed Valve Regulated lead acid batteries are commercialized[64].
1987/88 Sonnenschein builds a new factory (Weiden/Germany) for Gel 2 volt cells[65].
1988 40MWH Lead Acid load leveling battery delivering 5000 Amps at 2000 Volts (10 MW) for 4 hours installed by Southern California Edison (SCE) at Chino in California[66].
1989 Britain's National Power Company starts work on a load leveling battery employing Regenesys - Flow Battery - technology. Initial project for TVA is a 12MW, 120MWh battery[67].
1989 American physicist Paul M Brown US patented the Betavoltaic battery which converts nuclear energy into electricity[68].
1990 Commercialization of the NiMH battery[69].
1990 The first volume introduction of Lithium secondary cells for consumer applications[70].
1991 McIntosh, Alabama, an improved CAES 110 MW plant commenced operation[71].
1991 Swiss scientist Michael Grätzel and co-workers at the Swiss Federal Institute of Technology patent the Grätzel solar cell a regenerative battery[72].
1991 Sonnenschein joined the CEAC group[73].
1992 Austrian born Karl Kordesch of Canada patented the reusable alkaline or Rechargeable Alkaline Manganesebattery (RAM) battery[74].
1992 Joe Pinkerton forms Magnetic Bearing Technologies to commercialize magnetic bearings[75].
1992 Sonnenschein shut down Berlin plant (termination of starter battery manufacturing)[76].
1993 John Cooper working at the Lawrence Livermore Labs patents the Zinc Air refuelable battery[77].
1994 Bellcore patented the Plastic Lithium Ion (PLI) technology or solid state battery[78].
1995 Pouch cell introduced made possible by Lithium PLI technology[79].
1995 CEAC group bought by Exide (USA)[80].
1995 David Clifton and Joe Pinkerton of Magnetic Bearing Technologies conceive a low-cost integrated steel flywheel motor-generator as an alternative to lead-acid batteries[81].
1995 Duracell and Intel developed the Smart Battery system for Intelligent Batteries and proposed the specification with its associated SMBus as an industry standard[82].
1995 Energizer introduces On-cell battery condition indicator or fuel gauge for consumer cells[83].
1995 BMW abandons flywheel energy storage after a test technician is killed and two others injured when the containment enclosure failed[84].
1996 Researchers Theodore O. Poehler and Peter C. Searson at The Johns Hopkins University demonstrated an all-plastic battery. Despite claims that the cells are inexpensive and easy to manufacture, products using the technology have so far not appeared in the consumer marketplace[85].
1996 Magnetic Bearing Technologies applies for first of many patents for their Motor/Generator Flywheel innovations. Later that year they change the name to Active Power and raise initial funds to fund commercial development[86].
1997 Active Power ships first commercial DC backup power system to a customer in Florida[87]
1999 Active Power applies for patent on Integrated Flywheel UPS as well as a Uninterruptible Power Supply Utilizing Thermal Energy Storage lays the groundwork for future development of the TACAS Thermal and Compressed Air Storage) technology[88].
2000 Dr Randell Lee Mills, a Harvard-trained medical doctor and chemist who also studied biotechnology and electrical engineering at MIT, proposed the Hydrino Hydride Battery. The hydrinos produced by this process have unique physical and chemical properties which make many new applications possible[89].
2000 Exide buys GNB Technologies (USA) and gets new name Exide Technologies[90].
2000 Active Power uses public stock offering to fund production facilities and continued technology development[91].
2002 Various patents filed on nonmaterial used in lithium and other batteries to achieve increases in charge and discharge rates of 10 to 100 times[92].
2002 Commercialization of thin film batteries or solid state Lithium polymer based on patents from ORNL[93].
2003 University of California, San Diego is developing tiny robots they call "smart dust." These robots are smaller than a grain of sand and powered by nano batteries[94].
2003 German multi utilities group RWE, the new owners of National Power (now renamed to Innogy) abandoned the Regenesys battery project. The project was never completed after it spent $250 Million over 14 years[95].
2003 World's largest battery connected to provide emergency power to Alaska's second-largest city Fairbanks. The battery will provide 40 megawatts of power - enough for around 12,000 people - for up to seven minutes[96].
2003 Finnish metallurgist Rainer Partanen patents the rechargeable aluminum air battery and achieves very high energy densities using nanotechnology[97].
2003 Active Power applies for patent on Thermal Storage device for TACAS technology. The TACAS system is a combination of several mature energy storage technologies. The breakthrough was deciding to take elements of both flywheel and Compressed-Air Energy-Storage (CAES) technology to create a self-contained energy storage system. Compressed air and thermal energy drive an expansion turbine for long-duration outages and actually give off breathable air that is 55° F at 14.7 PSI, while a small flywheel system gives instantaneous response to load changes and short outages[98].
2004 Toshiba develops direct methanol fuel cell (DMFC) small enough to power mobile phones[99].
2005 Korean bioengineer Ki Bang Lee working at Singapore's Institute of Bioengineering and Nanotechnology, developed a paper battery powered by urine. It is for use as a simple, cheap and disposable power source for home health tests for diabetes and other ailments[100].
2005 Japanese Masaharu Satoh working at NEC in Japan developed a small light weight low capacity high power battery which runs for only a short period but can be charged and discharged at 100C called the Organic Radical Battery (ORB)[101].
2006 Active Power receives UL certification and begins production of the Thermal And Compressed Air Storage or TACAS called CoolAir DC[102]. The main components of the CoolAir DC system are:
Compressed-Air System
CoolAir DC begins with compressed air stored in conventional gas cylinders or pressure vessels.
Thermal Storage Unit (TSU)
The heart of CoolAir DC is a self-contained Thermal Storage Unit (TSU), in order to eliminate the need for an outside source of combustible gas a well insulated chamber holds a stainless steel core heated to about 1300° F with internal passages to transfer its stored heat to near 32° F regulated compressed air at about 400 PSI.
Flywheel Energy Storage
Cost and manufacturability were paramount for the CoolAir DC energy storage system so the resulting all-new flywheel design is a model of austerity.
Expansion Turbine
The heated compressed air at low inertia is used to spin a simple single-stage expansion turbine to reach full operating speed (70,000 rpm) in about a second. This turbine is extremely simple and compact.
The Complete CoolAir DC System
The figure below shows a block diagram of CoolAir DC. The TSU is maintained at full operating temperature and the compressed-air cylinders are kept fully charged. The flywheel system stays continually online with the DC bus which allows for precise regulation during load shifts and for very short outages (up to 3 seconds in duration). When CoolAir DC detects a longer outage, it activates the control valves and sends compressed air through the thermal storage unit and into the expansion turbine. The turbine and attached alternator reach operating speed assume the load and begin to recharge the flywheel in approximately one second. The total time required to regain full readiness is proportional to the discharge time. By comparison, thermal storage has excellent energy density — up to 3 times more joules/cubic foot than lead-acid batteries.
The most remarkable aspect of CoolAir DC is that all three energy storage technologies are mature and well-proven. The only novelty is bringing them together into a commercially viable product.
Energy storage has come a long way over the years. However there is still a lot of ground to cover until we reach a perfect solution that is reliable, energy dense/efficient, environmentally friendly, price competitive, safe to make, use and at the end of its life cycle reclaim.
[1] Dubpernell, G., "Evidence of the Use of Primitive Batteries in Antiquity". Selected Topics in the History of Electrochemistry, The Electrochemical Society, I-22 Princeton, NJ. 1978.
[2] D. Papin, Nouvelles Expériences du Vuide Avec la Description des Machines qui Servent à les Faire (Jean Cusson fils, Paris, 1674).
[3] Dibner, Bern. Early Electical Machines: The experiments and apparatus of two Enquiring Centrueis (1600 to 1800) That Led to the Triumphs of the Electrical Age. Norwalk, CN: Burgundy Library 1957
[4] Electrostatics: Exploring, Controlling and Using Static Electricity: A. D. Moore & J. M. Crowley. LaPlacian Press, Dec, 1997
[5] "Ján Andrej Segner." Wikipedia. 3 Apr. 2006. Wikimedia Foundation, Inc. 26 Apr. 2006 <http://en.wikipedia.org/wiki/Johann_Andreas_von_Segner
"Water Wheel." Wikipedia. 23 Apr. 2006. Wikimedia Foundation, Inc. 26 Apr. 2006.
[6] Dibner, Bern. Early Electrical Machines: The Experiments and Apparatus of Two Enquiring Centrueis (1600 to 1800) That Led to the Triumphs of the Electrical Age. Norwalk, CN: Burgundy Library 1957.
[7] Dunsheath, Percy. Giants of Electricity. NY: Thomas Y. Crowell. Company,1967.
[8]Moller, Peter. Electric Fishes: History and Behavior. Fish and Fisheries Series 17. NY: Chapman & Hall, 1995.
[9]Dibner, Bern. Early Electrical Machines: The experiments and apparatus of two Enquiring Centrueis (1600 to 1800) That Led to the Triumphs of the Electrical Age. Norwalk, CN: Burgundy Library 1957.
[10] Moller, Peter. Electric Fishes: History and Behavior. Fish and Fisheries Series 17. NY: Chapman & Hall, 1995.
[11] Leon, George deLucenay. The Electricity Story: 2500 Years of Experiments and Discoveries. NY: Arco Publishing, Inc., 1983.
Minds Behind the Brain: a History of the Pioneers and Their Discoveries / Stanley Finger. Oxford, New York Oxford University Press, c2000.
[12] Dibner, Bern. Early Electrical Machines: The Experiments and Apparatus of Two Enquiring Centrueis (1600 to 1800) That Led to the Triumphs of the Electrical Age. Norwalk, CN: Burgundy Library 1957.
Dunsheath, Percy. Giants of Electricity. NY: Thomas Y. Crowell. Company, 1967.
[13] Beck, A.H. Words and Waves: An Introduction to Electrical Communications. NY: McGraw-Hill Book Company, 1967.
[14] Moller, Peter. Electric Fishes: History and Behavior. Fish and Fisheries Series 17. NY: Chapman & Hall, 1995.
[15] Young Humphry Davy: the Making of an Experimental Chemist / June Z. Fullmer. Philadelphia: American Philosophical Society, 2000.
[16] Beck, A.H. Words and Waves: An Introduction to Electrical Communications. NY: McGraw-Hill Book Company, 1967.
[17] Leon, George deLucenay. The Electricity Story: 2500 Years of Experiments and Discoveries. NY: Arco Publishing, Inc., 1983.
[18] Dunsheath, Percy. Giants of Electricity. NY: Thomas Y. Crowell. Company, 1967.
[19] Leon, George deLucenay. The Electricity Story: 2500 Years of Experiments and Discoveries. NY: Arco Publishing, Inc., 1983.
Maurer J F (ed). Concise Dictionary of Scientific Biography. New York, NY, Charles Scribner's Sons, 1981, 624
[20] Beck, A.H. Words and Waves: An Introduction to Electrical Communications. NY: McGraw-Hill Book Company, 1967.
[21] "Water Turbine." Wikipedia. 6 Apr. 2006. Wikimedia Foundation Inc. 28 Apr. 2006.
[22] James, Frank. "Heritage Faraday Page." RIGB. 18 Aug. 2005. The Royal Institution of Great Britain. 26 Apr. 2006.
[23] Moller, Peter. Electric Fishes: History and Behavior. Fish and Fisheries Series 17. NY: Chapman & Hall, 1995.
Gutnik, Martin J. Simple Electrical Devices. A First Book Series.NY: Franklin Watts, 1986.
[24] Gutnik, Martin J. Simple Electrical Devices. A First Book Series.NY: Franklin Watts, 1986.
[25]Leon, George deLucenay. The Electricity Story: 2500 Years of Experiments and Discoveries. NY: Arco Publishing, Inc., 1983.
[26] Gutnik, Martin J. Simple Electrical Devices. A First Book Series.NY: Franklin Watts, 1986.
Van Doren, Charles. A History of Knowledge: Past, Present, and Future.
NY: Ballantine Books, 1991.
[27] Beck, A.H. Words and Waves: An Introduction to Electrical Communications. NY: McGraw-Hill Book Company, 1967.
Graf, Rudolf F. Safe and Simple Electrical Experiments NY: Dover Publications, Inc., 1964.
[28] Leon, George deLucenay. The Electricity Story: 2500 Years of Experiments and Discoveries. NY: Arco Publishing, Inc., 1983.
[29] Graf, Rudolf F. Safe and Simple Electrical Experiments NY: Dover Publications, Inc., 1964.
[30] Henry Fluess." Wikipedia. 20 Oct. 2005. Wikimedia Foundation, Inc. 26 Apr. 2006.
[31] Leon, George deLucenay. The Electricity Story: 2500 Years of Experiments and Discoveries. NY: Arco Publishing, Inc., 1983.
[32] Graf, Rudolf F. Safe and Simple Electrical Experiments NY: Dover Publications, Inc., 1964.
Bordeau, Sanford P. Volts to Hertz . . . the Rise of Electricity. Minneapolis, Minn: Burgess Publishing Company, 1982.
[33] Graf, Rudolf F. Safe and Simple Electrical Experiments NY: Dover Publications, Inc., 1964.
[34] Leon, George deLucenay. The Electricity Story: 2500 Years of Experiments and Discoveries. NY: Arco Publishing, Inc., 1983.
[35] Dunsheath, Percy. Giants of Electricity. NY: Thomas Y. Crowell. Company, 1967
[36] Parker, Steve. In the Footsteps of Frankenstein. Brookfield, CN: Copper Beech Books, 1995.
[37] Southampton Electrochemistry Group, Instrumental Methods in Electrochemistry, Ellis Horwood/Wiley, N.Y. 1985.
[38] Gutnik, Martin J. Simple Electrical Devices. A First Book Series.NY: Franklin Watts, 1986.
[39] Leon, George deLucenay. The Electricity Story: 2500 Years of Experiments and Discoveries. NY: Arco Publishing, Inc., 1983
J.O'M. Bockris, B.E. Conway, and R.E. White, Modern Aspects of Electrochemistry, Vol. 1-3, Butterworths, London, 1954-1964; Vol. 4-31, Plenum Press, NY 1966-1997; Vol. 32-, Kluwer/Plenum, NY 1999-2002.
[40] Southampton Electrochemistry Group, Instrumental Methods in Electrochemistry, Ellis Horwood/Wiley, N.Y. 1985.
[41] Southampton Electrochemistry Group, Instrumental Methods in Electrochemistry, Ellis Horwood/Wiley, N.Y. 1985.
[42] Dunsheath, Percy. Giants of Electricity. NY: Thomas Y. Crowell. Company, 1967.
[43] Beck, A.H. Words and Waves: An Introduction to Electrical Communications. NY: McGraw-Hill Book Company, 1967.
[44] From Edison to Enron: The Business of Power and What it Means for the Future of Electricity / Richard Munson. Publisher Westport, Conn.: Praeger Publishers, 2005.
[45] Van Doren, Charles. A History of Knowledge: Past, Present, and Future. NY: Ballantine Books, 1991
[46] Ibid.
[47] Ibid.
[48] "Scuba Set." Wikipedia. 24 Apr. 2006. Wikimedia Foundation, Inc. 27 Apr. 2006.
[49] Electrostatics: Exploring, Controlling and Using Static Electricity: A. D. Moore & J. M. Crowley. LaPlacian Press, Dec, 1997
[50] Scuba Set." Wikipedia. 24 Apr. 2006. Wikimedia Foundation, Inc. 27 Apr. 2006.
[51] From Edison to Enron: The Business of Power and What it Means for the Future of Electricity / Richard Munson. Publisher Westport, Conn.: Praeger Publishers, 2005
[52]Ibid.
[53] Beck, A.H. Words and Waves: An Introduction to Electrical Communications. NY: McGraw-Hill Book Company, 1967.
[54] Gutnik, Martin J. Simple Electrical Devices. A First Book Series.NY: Franklin Watts, 1986.
[55] Electrostatics: Exploring, Controlling and Using Static Electricity: A. D. Moore & J. M. Crowley. LaPlacian Press, Dec, 1997.
[56] Gutnik, Martin J. Simple Electrical Devices. A First Book Series.NY: Franklin Watts, 1986
[57] Dunsheath, Percy. Giants of Electricity. NY: Thomas Y. Crowell. Company, 1967.
Bordeau, Sanford P. Volts to Hertz . . . the Rise of Electricity .Minneapolis, MN: Burgess Publishing Company, 1982.
[58] From Edison to Enron: the Business of Power and What it Means for the Future of Electricity / Richard Munson. Publisher Westport, CN: Praeger Publishers, 2005.
[59] Ibid.
[60] Electrostatics: Exploring, Controlling and Using Static Electricity: A. D. Moore & J. M. Crowley. LaPlacian Press, Dec, 1997
[61] "CAES Technology: History." Ridge Energy Storage. Ridge Energy Storage & Grid Services L.P. 26 Apr. 2006
[62] From Edison to Enron: the Business of Power and What it Means for the Future of Electricity / Richard Munson. Publisher Westport, CN: Praeger Publishers, 2005.
[63] Ibid.
[64] Ibid.
[65] Ibid.
[66] Ibid.
[67] Ibid.
[68] Electrostatics: Exploring, Controlling and Using Static Electricity: A. D. Moore & J. M. Crowley. LaPlacian Press, Dec, 1997
From Edison to Enron: the business of power and what it means for the future of electricity / Richard Munson. Publisher Westport, CN: Praeger Publishers, 2005.
[69] Ibid.
[70] Ibid.
[71] "CAES Technology: History." Ridge Energy Storage. Ridge Energy Storage & Grid Services L.P. 26 Apr. 2006
[72] Ibid.
[73] Ibid.
[74] Ibid. .
[75] Bryce, Robert. "Active Power Spins for Profits in a Surging Industry." The Austin Chronicle [Austin] 9 Feb. 2001. Austin Chronicle Corp. 2 May 2006. http://www.austinchronicle.com.
[76] Ibid.
[77] J.O'M. Bockris, B.E. Conway, and R.E. White, Modern Aspects of Electrochemistry, Vol. 1-3, Butterworths, London, 1954-1964; Vol. 4-31, Plenum Press, NY 1966-1997; Vol. 32-, Kluwer/Plenum, NY 1999-2002.
[78] From Edison to Enron: the Business of Power and What it Means for the Future of Electricity / Richard Munson. Publisher Westport, CN: Praeger Publishers, 2005.
[79] Ibid.
[80] Ibid.
[81] “Method and Apparatus for Providing an Uninterruptible Supply of Electric Power to a Critical Load ." USPO Patent Full-Text and Image Database. 3 July 2001. United States Patent and Trademark Office. 1 May 2006. http://www.uspto.gov.
[82] Ibid.
[83] Ibid.
[84] Ibid.
[85] J.O'M. Bockris, B.E. Conway, and R.E. White, Modern Aspects of Electrochemistry, Vol. 1-3, Butterworths, London, 1954-1964; Vol. 4-31, Plenum Press, NY 1966-1997; Vol. 32-, Kluwer/Plenum, NY 1999-2002.
[86] Bryce, Robert. "Active Power Spins for Profits in a Surging Industry." The Austin Chronicle [Austin] 9 Feb. 2001. Austin Chronicle Corp. 1 May 2006. http://www.austinchronicle.com.
[87] Perlman, Sar. "Flywheel Technology Aims to Replace UPS Batteries." EGSA Powerline Magazine Jan.-Feb. 2001. Electrical Generating Systems Association. 2 May 2006 http://www.egsa.org.
[88] Andrews, James A., et al. Integrated Flywheel Uninterruptible Power Supply System . Active Power, Inc., assignee. Patent 6,657,320. 2 Dec. 2003. United States Patent and Trademark Office. 2 May 2006. http://www.uspto.gov.
[89] From Edison to Enron: the Business of Power and What it Means for the Future of Electricity / Richard Munson. Publisher Westport, CN: Praeger Publishers, 2005.
[90] Ibid.
[91] Cavalli, Alex. Enriching Economy and Environment: Making Central Texas the Center for Clean Energy. Diss. University of Texas at Austin, 2002. Austin: Austin Clean Energy, n.d.
[92] Ibid.
[93] Ibid.
[94] Ibid.
[95] Ibid.
[96] Ibid.
[97] Ibid.
[98] "Fresh on the Market- New Products." Power and Energy Magazine, IEEE Jan.-Feb. 2005: 82-83
[99] Ibid.
[100] Ibid.
[101] Ibid.
[102] "Active Power Receives UL Certification for CoolAir(TM) DC Product Line." Stockhouse: Empowering Investors 21 Mar. 2006. 2006. Stockgroup Media. Inc. 2 May 2006. http://www.stockhouse.com.