摘要
Abstract
The effect of formation processes on performance of Li-ion battery,whose cathode and anode materials were lithium cobaltate (LiCoO2) and graphite,was analyzed.The differences of battery performance were analyzed through the anode solid electrolyte interphase(SEI) film forming mechanism,which was taken into account the capacity,ratio,impedance,storage and cycle performance.Compare to the battery with 3.80 V,the battery with 3.70 V of formation charge cut-off voltage had better performance in capacity,rate,impedance and storage.The different thickness of SEI film was variable with different formation charge cut-off voltage,the SEI film with 3.80 V of formation charge cut-off voltage had a thicker layer of organic lithium salt with a porous morphology.The organic layer was instable,which made the storage performance of battery worse.关键词
锂离子电池/化成电压/固体电解质相界面(SEI)膜/电化学性能Key words
Li-ion battery/formation voltage/solid electrolyte interphase(SEI) film/electrochemical performance分类
信息技术与安全科学
