CLAD MATERIAL FOR BATTERY NEGATIVE ELECTRODE LEAD MATERIAL PROCESS FOR PRODUCTION OF CLAD MATERIAL FOR BATTERY NEGATIVE ELECTRODE LEAD MATERIAL AND BATTERY

摘要

A clad material for a battery negative electrode lead material is constituted of a clad material of a three-layer structure including a first layer constituted of pure Ni, a second layer constituted of pure Cu and a third layer constituted of pure Ni. The thickness of a first diffusion layer formed between the first layer and the second layer and the thickness of a second diffusion layer formed between the second layer and the third layer are 0.5 m or thicker and 3.5 m or thinner.