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  2. Electrochemistry - Wikipedia

    en.wikipedia.org/wiki/Electrochemistry

    For example, gaseous oxygen (O 2) and hydrogen (H 2) can be combined in a fuel cell to form water and energy, typically a combination of heat and electrical energy. [ 25 ] Conversely, non-spontaneous electrochemical reactions can be driven forward by the application of a current at sufficient voltage .

  3. Sources of electrical energy - Wikipedia

    en.wikipedia.org/wiki/Sources_of_electrical_energy

    Light: Energy produced by light being absorbed by photoelectric cells, or solar power. Chemical: Energy produced by chemical reaction in a voltaic cell, such as an electric battery. Pressure: Energy produced by compressing or decompressing specific crystals. Magnetism: Energy produced in a conductor that cuts or is cut by magnetic lines of ...

  4. Electrochemical cell - Wikipedia

    en.wikipedia.org/wiki/Electrochemical_cell

    An electrochemical cell is a device that generates electrical energy from chemical reactions. Electrical energy can also be applied to these cells to cause chemical reactions to occur. [1] Electrochemical cells that generate an electric current are called voltaic or galvanic cells and those that generate chemical reactions, via electrolysis for ...

  5. Chemical energy - Wikipedia

    en.wikipedia.org/wiki/Chemical_energy

    Chemical energy is the energy of chemical substances that is released when the substances undergo a chemical reaction and transform into other substances. Some examples of storage media of chemical energy include batteries, [1] food, and gasoline (as well as oxygen gas, which is of high chemical energy due to its relatively weak double bond [2] and indispensable for chemical-energy release in ...

  6. List of electrical phenomena - Wikipedia

    en.wikipedia.org/wiki/List_of_electrical_phenomena

    Sparks — Electrical breakdown of a medium that produces an ongoing plasma discharge, similar to the instant spark, resulting from a current flowing through normally nonconductive media such as air. Telluric currents — Extremely low frequency electric current that occurs naturally over large underground areas at or near the surface of the Earth.

  7. Energy conversion efficiency - Wikipedia

    en.wikipedia.org/wiki/Energy_conversion_efficiency

    The electrical energy input of this cell is 1.20 times greater than the theoretical minimum so the energy efficiency is 0.83 compared to the ideal cell. A water electrolysis unit operating with a higher voltage that 1.48 V and at a temperature of 25 °C would have to have heat energy removed in order to maintain a constant temperature and the ...

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  9. Nanobatteries - Wikipedia

    en.wikipedia.org/wiki/Nanobatteries

    A battery converts chemical energy to electrical energy and is composed of three general parts: Anode (positive electrode) Cathode (negative electrode) Electrolyte; The anode and cathode have two different chemical potentials, which depend on the reactions that occur at either terminus.

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