热重法分析碱性锌锰电池尼龙密封圈的老化  

Thermogravimetric analysis of aging degree of nylon gasket in alkaline Zn/MnO2 battery

作　　者：钱明君 胡春益 陈国标 QIAN Ming-jun;HU Chun-yi;CHEN Guo-biao([Zhongyin ( Ningbo) Battery Co.,Ltd.,Ningbo,Zhejiang 315040,China)

机构地区：[1]中银(宁波)电池有限公司

出　　处：《电池》2019年第1期60-63,共4页Battery Bimonthly

摘　　要：利用热重(TG)分析法对碱性锌钮(碱锰)电池的尼龙密封圈进行老化分析。在氮气气氛中,尼龙密封圈在40-800℃的热解过程可分为3个失重阶段。由Flynn-wall-Ozawa法求得未老化密封圈的热解活化能Ea为247-250kJ/mol,指前因子A为8.8×10^18/s。与由Coat-Redfern法得到的活化能值对比,确定尼龙密封圈的热解过程符合Malek机理,得到反应机理函数和反应级数。可通过一次简单测试求出不同状态下碱锰电池尼龙密封圈的Ea,评价材料的热稳定性及不同状态下尼龙密封圈的老化程度。5a存储电池的密封圈Ea约在200kJ/mol,可见密封圈未发生明显降解老化。The aging analysis of nylon gasket in alkaline Zn/MnO2 battery was researched by thermogravimetric (TG) analysis method. The thermal decomposition processes was divided into three stages in 40 - 800℃ in the nitrogen atmosphere. From Flynnwall- Ozawa methods, the thermal decomposition activation energy Ea for the decomposition reaction of the nylon gasket was 247 - 250 kJ/ mol and the pre-exponential factor A was 8.8×10^18/s. Compared with the activation energies obtained by Coat-Redfern method, the pyrolysis process of nylon gasket was confonned to Malek mechanism, the reaction mechanism function and reaction order were obtained. The Ea decomposition activation energy of nylon gasket in alkaline Zn/MnO2 battery under different conditions could be obtained by a simple test, the Ea stability of the materials and the aging degree of nylon gasket under different conditions was evaluated. The thermal decomposition activation energy of nylon gasket for 5 a stored battery was about 200 kJ/mol, which showed that the gasket was not degraded obviously.

关 键 词：碱性锌钮(碱猛)电池 尼龙密封圈 热重(TG)分析 活化能 老化 

分 类 号：TM911.41[电气工程—电力电子与电力传动]