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

摘要

Commercialization of the lithium ion battery(LIB)made available an energy density of around three times as high or more than could be obtained with nickel-cadmium (Ni/Cd)or nickel-metal hydride batteries (Ni/H2),in terms of both weight and volume,as shown in Figure 1., facilitating a major reduction in the size and weight of the power supply of portable devices.Moreover,by providing an electromotive force of 4 V or more,the LIB made it possible to drive a cellular phone with a single cell.