快充型锂离子电池负极片设计的研究  

Study of Anode Electrode Design for Fast-charging Lithium-ion Battery

作　　者：彭冲 Peng Chong(Zhuhai COSMX Battery Co.,Ltd.,Zhuhai 519180,China)

机构地区：[1]珠海冠宇电池股份有限公司,广东珠海519180

出　　处：《广东化工》2024年第22期23-25,16,共4页Guangdong Chemical Industry

摘　　要：为解决锂离子电池高体积能量密度和快充的技术矛盾,本文基于包覆石墨和双层电极结构设计了两组负极片。一组是将包覆石墨与非包覆石墨混合使用,另一组是采用双层涂布技术制备了具有双层结构的负极片,表层是包覆石墨,底层是非包覆石墨。使用两组负极片分别制备出了软包锂离子电池,通过测试电池内阻、充电速度、循环等性能来考察负极片设计对快充型电池性能的影响。实验结果表明,双层结构负极片具备更优的充电速度和循环性能,更适合于快充型锂离子电池。In order to resolve the technical contradiction between high volume energy density and fast-charging in lithium-ion battery,two groups of anode electrodes based on coated graphite and double layer electrode structure were designed.One group is the mixture of coated graphite and un-coated graphite,the other group is the double layer electrode manufactured by dual-layer coating technology,the top layer is coated graphite and the bottom layer is un-coated graphite.Pouch cells were manufactured with these two groups of electrodes.The internal resistance,charging speed and cycle performance of these two groups of pouch cells was tested in order to study the effect of electrode design on the cell performance.Results illustrate that the double layer electrode has better charge speed and cycle life performance and is more suitable for fast-charging lithium-ion battery.

关 键 词：锂离子电池 负极 双层电极 快充 石墨 

分 类 号：TQ152[化学工程—电化学工业] TM911[电气工程—电力电子与电力传动]