原电池变温阻抗分析  

Analysis on the impedance of primary batteries at different temperatures

作　　者：吴军[1] 徐艳辉[1] 李德成[1] 郑军伟[1] 

机构地区：[1]苏州大学化学电源研究所,江苏苏州215006

出　　处：《电池工业》2011年第1期25-28,共4页Chinese Battery Industry

基　　金：科研院所专项基金的支持(2009EG111014)

摘　　要：改变环境温度下分析了原电池的阻抗响应。基于低频扩散阻抗、高频区域半圆对应的线性极化电阻等随电池放电态的变化规律,分析了正、负极对原电池阻抗的贡献,指出了原电池放电性能改进的关键是提高正极性能。不同温度下测量的Nyquist图上,低频域的阻抗数据的斜率随放电态的变化规律不同:在280K,斜率随放电态增加而增大并接近1;在300K,斜率和放电态无关,接近常数1;在320 K,放电态比较小时,斜率远大于1,随放电态降低并最终接近1。At various environmental temperatures,the impedance spectrum of Zn-MnO2 battery were examined.Based on the changing rules for the low-frequency diffusion impedance and the linear polarization resisitance in high-frequency area varying with the battery discharging state,the contribution of positive and negative electrodes were analyzed.It was pointed out that the important for primary battery was to improve the performance of positive electrode.The dependence of slope of impedance data in low-frequency area in Nyquist plot in the discharge states was also analyzed and an interesting phenomenon was found that the slope with the state of discharge was dependent on the environmental temperatures.At 280 K,the slope increased with the state of discharge,while at 320 K,it decreased.However,when the state of discharge reached 100%,the slopes tended to unit,independent of the temperature.

关 键 词：交流阻抗谱 原电池 放电态 线性极化电阻 扩散阻抗 

分 类 号：TM911[电气工程—电力电子与电力传动]