NONAQUEOUS ELECTROLYTIC SECONDARY CELL

摘要

PURPOSE:To improve a charge and discharge life and to upgrade reliability by specifying an average crystal grain size of a metallic material used on a negative electrode. CONSTITUTION:An average crystal grain size of a metallic material used on a negative electrode is made to be 1 mum<3> or more. A negative electrode obtained in this way is hard to be fined and powdered even if alkali metal ions are absorbed and released by charge and discharge. Therefore, when this metallic material is used for a negative electrode, a nonaqueous electrolytic secondary cell excellent in a charge and discharge life and high in reliability can be obtained.