正极活性物质软化过程研究  

Study on the softening process of positive active mass

作　　者：刘孝伟 吴国强 徐涛 陈理 殷思思 黄伟国 LIU Xiaowei;WU Guoqiang;XU Tao;CHEN Li;YIN Sisi;HUANG Weiguo(Chilwee Power Co.,Ltd.,Changxing Zhejiang 313100,China)

机构地区：[1]超威电源有限公司,浙江长兴313100

出　　处：《蓄电池》2020年第5期205-210,共6页Chinese LABAT Man

摘　　要：采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、差热分析仪(TG/DTA)等仪器,对不同充放电循环阶段的正极活性物质(PAM)进行分析,探讨PAM的软化进程,分析掺杂Sb元素对PAM软化进程的影响。结果表明,PAM软化与骨架间孔结构的不断扩大和骨架内部晶体结构不断变化两个进程有关,而且掺杂Sb元素能改变骨架内部晶体的变化进程,提高PAM的抗软化能力。Scanning electron microscope(SEM),X-ray diffraction(XRD),and differential thermal analyzer(TG/DTA)were used to analyze the positive active mass(PAM)in different charge and discharge cycle stages,and to study the softening process of PAM.The influence of Sb on PAM softening process was analyzed.The results show that PAM softening was related to the expanding pore structure between the skeleton and the changing crystal structure inside the skeleton.Sb doping can change the evolution process of the crystal inside the skeleton and improve the anti-softening ability of the PAM.

关 键 词：正极活性物质 软化 孔结构 循环性能 失效模式 Sb元素 骨架 铅炭电池 

分 类 号：TM912.1[电气工程—电力电子与电力传动]