NEGATIVE POLE FOR SECONDARY CELL, SECONDARY CELL USING THE NEGATIVE POLE, AND NEGATIVE POLE MANUFACTURING METHOD

摘要

A negative pole for secondary cell formed in a multi−layer structure having a first negative pole layer (2a) mainly formed of carbon, a second negative layer (3a) mainly formed of film−shaped material allowing a lithium component to pass therethrough, and a third negative layer (4a) formed mainly of lithium and /or a chemical compound containing lithium and capable of occluding and releasing lithium ions, whereby the cell capacity of the lithium ion secondary cell can be substantially increased while maintaining high charging and discharging efficiencies and excellent cyclic characteristics.