Ratner & Prestia
Method of producing positive active material for non-aqueous electrolyte secondary batteries
 The present invention relates to a method of producing a positive active material for a non-aqueous electrolyte secondary battery generally referred to as a lithium-ion secondary battery and is intended to provide a method of producing a new positive active material which is superior in both discharge capacity and cycle life through improvement of a complex oxide of lithium and nickel from which a high discharge capacity can be expected. In order to attain this object, a Li-containing complex oxide is synthesized in this method by firing a mixture of a nickel oxide, in which an element M (M being at least an element selected from the group consisting of Co, Mn, Cr, Fe, and Mg) is dissolved as a solid solution, and lithium hydroxide or its hydrate. By using this as an active material in the positive electrode, it is possible to realize a non-aqueous electrolyte secondary battery which has a high capacity and a long cycle life, and which will not suffer from storage at a high temperature in a charged state. 
Matsushita Electric Industrial Co., Ltd.
C H C H H H C H C C H C Y C
C01P H01M C01P H01M H01M H01M C01G H01M C01G C01P H01M C01G Y02E C01G
additional additional additional inventional inventional additional inventional additional inventional additional additional inventional additional inventional
Yasuhiko Tomoko Shigeo Akira Takafumi Shoichiro
Shoji Kawano Kobayashi Hashimoto Fujiwara Watanabe