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    • 6. 发明授权
    • Secondary electrochemical cell
    • 二次电化学电池
    • US5591543A
    • 1997-01-07
    • US441628
    • 1995-05-15
    • Emanuel PeledChen MenachemAharon Gorenshtein
    • Emanuel PeledChen MenachemAharon Gorenshtein
    • H01M4/48H01M4/485H01M4/50H01M4/505H01M4/52H01M4/525H01M6/16
    • H01M4/485H01M4/505H01M4/525
    • The invention relates to novel cathodes for secondarylithium cells and to lithium cells which contain such cathodes. The secondary cells can be charged and discharged substantially more times than corresponding cells which contain conventional LiCoO.sub.2 type cathodes.The cathodes are based on crystalline compounds of the Li.sub.1 x M.sub.x/2 CoO.sub.2 type. One of the aspects of the invention is a process for the production of such crystalline cathodes, where M is selected from calcium, strontium, barium and magnesium and where the content of such bivalent cation M in the crystal is from about 0.1 weight-% to about 10 weight-%, preferably 0.2 to 5 weight-%. The novel crystalline cathode compound is synthesized by a solid/solid reaction at elevated temperature, generally in the 700.degree. C. to about 900.degree. C. range. The cathode may be prepared from small crystals of such a compound, in combination with a compatible binder or conductive material, such as graphite.
    • 本发明涉及用于二芳基锂电池的新型阴极和含有这种阴极的锂电池。 二次电池可以比含有常规LiCoO 2型阴极的相应电池大大多次充电和放电。 阴极基于Li1 xMx / 2CoO2型的结晶化合物。 本发明的一个方面是制备这种结晶阴极的方法,其中M选自钙,锶,钡和镁,并且其中该结晶中这种二价阳离子M的含量为约0.1重量%至约0.1重量% 约10重量%,优选0.2至5重量%。 新型结晶阴极化合物通过固体/固体反应在升高的温度下合成,通常在700℃至约900℃的范围内。 阴极可以由这种化合物的小晶体与相容的粘合剂或导电材料如石墨组合制备。