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Chemistry Internet Searching Activity

Chemistry Internet Searching Activity. Wong Tsz Kan F.6B (28). Introduction of Secondary Cell. Secondary cell is electrolytic cells in which the electrochemical reaction that releases energy is reversible. They must be charged before use. Commonly used secondary cell chemistries are:

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Chemistry Internet Searching Activity

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  1. Chemistry Internet Searching Activity Wong Tsz Kan F.6B (28)

  2. Introduction of Secondary Cell Secondary cell is electrolytic cells in which the electrochemical reaction that releases energy is reversible. They must be charged before use. Commonly used secondary cell chemistries are: Lead-acid battery Nickel cadmium (NiCd) Nickel metal hydride (NiMH) Lithium ion (Li-ion) Lithium ion polymer (Li-ion polymer) (Li-ion polymer) (NiCd) (Li-ion) (NiMH) (Lead-acid battery)

  3. Introduction of Fuel Cell • Fuel cell operates like a battery. However, a fuel cell does not require recharging. • It will produce energy in the form of electricity and heat. • Consists of two electrodes sandwiched around an electrolyte. Oxygen passes over one electrode and hydrogen over the other, generating electricity, water and heat.

  4. Application of Secondary cell(I) Lead-acid battery: • Starter batteries: ~Car battery ~Supplies electric energy to the starter motor ~and the ignition system of a vehicle’s engine. • Stand-by (stationary) batteries: ~Designed for installations requiring highly reliable power back-up, ~failsafe engine starting ~and bulk energy storage

  5. Application of Secondary cell(II) • Nickel cadmium (NiCd): ~Portable electronics and toys ~Specialty NiCd batteries can be use in the area of wireless telephones, emergency lighting, etc. • Nickel metal hydride (NiMH): (similar to a NiCd battery but has a hydrogen-absorbing alloy for the anode instead of Cd. ) ~The Alstom Citadis low floor tram ordered for Nice, France ~The humanoid prototype robot ASIMO designed by Honda ~Electronic devices such as digital cameras, flashlights, etc. ~wireless power tools and RC cars. ~Hybrid vehicles

  6. Application of Secondary cell(III) • Lithium ion (Li-ion): ~Consumer electronics, especially portable electronics (camera, mp3 player, torch, mobile phone, etc. ) • Lithium ion polymer (Li-ion polymer): ~Manufacturing the mobile phone batteries. (the battery can be shaped) ~Radio-controlled aircraft, ~Used in PDAs and laptop computers. ~Power the next generation of battery electric vehicles.

  7. Application of Fuel cell • power sources in remote locations, such as spacecraft, remote weather stations, large parks, rural locations, and in certain military applications. • micro combined heat and power, which is cogeneration for family home, office buildings and factories. • Car battery

  8. Reference http://en.wikipedia.org/wiki/Fuel_cell http://en.wikipedia.org/wiki/Secondary_cell

  9. The End

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