NiMH batteries secondary

Nickel-metal-hydride (NiMH) battery (13.5) Secondary (rechargeable) battery used in many small electronic devices involves the oxidation of hydrogen from a metal hydride and the reduction of nickel oxyhydroxide (NiO(OH)). Compared with nicad batteries, NiMH eliminates the use of toxic cadmium and is less prone to memory effects. 

Recommended battery seminars are the Power Conference, Annual Battery Conference, The International Seminar on Primary and Secondary Battery Technology and Application, andthe Power Source Conference, Mobile Communications magazine frequently feature articles addressing new battery technologies. This information is commonly user-oriented and provides hints on how to get the most out of rechargeable batteries. Additional battery information can be found on the Web under NiCd, NiMH, Battery Analyzer, or Battery, in general. 

A battery cell consists of chemical compoimds, internal conduaors, positive and n ative connections, and the casii. Examples of cells include sizes N, AA, AAA, C, and D. A cell that caimot be recharged is called a primary cell An alkaline battery is an example of a primary cell. On the other hand, a secondary cell is a cell that can be recharged. The recharging is accomplished by reversing the current flow finm the positive to the negative areas. Lead add cells in your car battery and nickel-cadmium (NiCd), and nickel-metal hydride (NiMH) cells are examples of secondary cells. The NiCd batteries are some of the most common rechargeable... 

The nickel-based systems have traditionally included the following systems -nickel-iron (Ni/Fe), nickel-cadmium (NiCd), nickel metal hydrides (NiMH), nickel hydrogen (Ni/H2), and nickel-zinc (Ni/Zn). Of these, the metal hydride chemistry has been the most successful in the secondary battery market. AU nickel systems are based on the use of a nickel oxide active material (undergoing one valence change from charge to discharge or vice-versa). The electrodes can be pocket type, sintered type, fibrous type, foam type, pasted type, or plastic roll-bonded type. All systems use an alkaline electrolyte, KOH. 

Ishiwa K, Ito T, Miyamoto K, Takano K, Suzuki S (1999) Evolution and extension of NiMH technology. In 16th international seminar on primary and secondary batteries. Ft. Lauderdale... 

K. Ishiwa, T. Ito, K. Miyamoto, K. Takano, S. Suzuki, Evolution and Extension of NiMH Technology, 16th International Seminar on Primary and Secondary Batteries, Ft. Lauderdale, Florida, March 1999. 

Some of the commonly used secondary rechargeable batteries are lead acid, Li-ion, Li metal, Ni-Cd, NiMH, and Zn-air. 

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