A battery is a chemical device for the storage of the electricity. Since electricity cannot be stored directly (except in electrolytic capacitors and super conducting coils) it is necessary to utilize an indirect form of storage. Possibilities include the conversion of electrical energy into potential energy, thermal energy or chemical energy. Electrolysers and fuel cells are, like batteries, electrochemical energy-conversion devices.There are two useful ways in which to categorize batteries. The first is âprimary batteriesâ, which are discharged once and then discarded, and secondary batteries, which are recharged and thus used many times. Over the past decade there has been a growing interest in Lithium batteries. Since the early1990s, when Sony manufactured the first commercial lithium ion battery, extensive efforts have been undertaken to improve battery performance. This paper summarizes the materials processing technique applied to the fabrication of lithium ion batteries and the methods for improve the battery performance are introduced.
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