| 摘要 |
PURPOSE:To provide a negative electrode for lithium secondary battery which has a large charge/discharge capacity and a high electromotive force, and is minimized in the deterioration by repeat of charge/discharge, and a lithium secondary battery using this negative electrode. CONSTITUTION:This negative electrode A for lithium secondary battery has a laminated body having a porous layer 3 consisting of Li alloy formed on the surface of a carbon layer 2. The Li alloy used in the porous layer 3 has a characteristic that the speed of absorption and release of Li is slow, compared with the carbon used in the carbon layer 2, and Li-Si alloy or Li-Zn alloy is particularly preferred. The composition ratio of each alloy is most preferably about Li:Si=1:(3.3-4.4) in the Li-Si alloy and about Li:Zn=l:(1-1.5) in the Li-Zn alloy. |
