NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PURPOSE:To obtain a nonaqueous electrolyte secondary battery having a high energy density and a long charge-and-discharge life and being excellently safe and reliable by causing lithium or the like to be absorbed by a negative electrode material during charging and causing the negative electrode material to discharge lithium ion or the like into electrolyte during discharging by using cadmium or an alloy principally consisting of cadmium as the negative electrode material. CONSTITUTION:Cadmium metal or an alloy principally consisting of cadmium is used as a negative electrode material so that it absorbs alkali metal ion contained in electrolyte during charging and discharges the absorbed alkali metal ion during discharging. It is preferred that the above negative electrode material consisting of an alloy principally composed of cadmium contain at least one element chosen from among bismuth, lead, tin and indium as well.