锂离子电池用铝箔结构的分析  

Analysis of aluminum foil structure for Li-ion battery

作　　者：梅铭 向黔新 祝巧凤 秦俊杰 MEI Ming;XIANG Qian-xin;ZHU Qiao-feng;QING Jun-jie(Shenzhen Zhenhua Electro-chemical Co.,Ltd.,Shertzhen,Guangdong 518102,China;Guizhou Zhenhua Electro-chemical Co.,Ltd.,Guiyang,Guizhou 550016,China)

机构地区：[1]深圳市振华新材料股份有限公司,广东深圳518102 [2]贵州振华新材料有限公司,贵州贵阳550016

出　　处：《电池》2018年第5期338-340,共3页Battery Bimonthly

基　　金：贵州省科学技术基金(黔科合支撑[2016]2310号)

摘　　要：采用电感耦合等离子体原子发射光谱(ICP-AES)、拉力、XRD及透射电子显微镜(TEM)测试,对锂离子电池用薄型铝箔的成分、力学性能及金相结构等进行分析。强度高、加工性能好的薄型铝箔,晶体尺寸在50~100μm不等,微区晶相存在过渡区,且相对于厚铝箔,硅与铁含量之和略有增加,从0. 5%提高到0. 7%,有可能是硅/铁形成的新金相结构促进了薄型铝箔强度的提高(约4%)。对采用薄型铝箔的锂离子电池的高温(60℃)循环(0. 7 C充电/0. 5 C放电,3. 0~4. 2 V)性能进行分析,循环300次,容量保持率在93%以上。By inductive coupled plasma atomic emission spectrometer（ ICP-AES）,tension,XRD and transmission electron microscope（ TEM） tests,the ingredients,mechanical properties and the structure of thin aluminum foil for Li-ion battery were characterized. The crystal structure of thin aluminum foil with high tension strength was between 50-100 μm,a transition zone between crystal zone was observed,the content amount of ferrum and silicon was increased from 0. 5% to 0. 7% compared to thick aluminum foil,it may attributed to forming transition zone and enhancing thin aluminum foil tension strength properties（ improving4%）. Electrochemical performance of thin aluminum foil in Li-ion battery was also studied. The battery capacity retention was above93% after 300 cycles at 60 ℃（0. 7 C charge,0. 5 C discharge,3. 0-4. 2 V）.

关 键 词：锂离子电池 薄型铝箔 加工性能 拉伸强度 高温循环性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]