摘要 |
PURPOSE:To increase charge-discharge performance by alloying lithium with an aluminium-bismuth alloy and using in a negative electrode. CONSTITUTION:Two lithium sheets and an aluminium-bismuth alloy containing 1wt% bismuth are used as negative material. A lithium sheet 3a, an aluminium- bismuth sheet 3b, and a lithium sheet 3c are placed in order inside a negative can 1, and a battery is assembled in a regular way. The lithium sheets 3a, 3c and the aluminium-bismuth alloy sheet 3b are electrochemically alloyed under the existence of electrolyte to form a negative electrode 3. Thereby, a lithium secondary battery having excellent charge-discharge cycle performance can be obtained. |