COURSE OF DEVELOPMENT OF THE LITHIUM ION BATTERY AND OUTLOOK FOR THE FUTURE

摘要

Commercialization of the lithium ion battery(LIB) madenavailable an energyndensity of around threentimes as high or morenthan could be obtainednwith nickel-cadmiumn(Ni/Cd) or nickel-metalnhydride batteriesn(Ni/H2), in terms of bothnweight and volume, asnshown in Figure 1.,nfacilitating a majornreduction in the size andnweight of the power supply of portable devices. Moreover, bynproviding an electromotive force of 4 V or more, the LIB made itnpossible to drive a cellular phone with a single cell.