炭气凝胶的添加改善铅酸电池负极的性能  

Addition of carbon aerogel improves the performance of lead-acid batteries

作　　者：丁亚红 杜鸿达[1] DING Ya-hong;DU Hong-da(Guangdong Provincial Key Laboratory of Thermal Management Engineering and Materials,Tsinghua University Shenzhen Graduate School,Shenzhen 518055,China)

机构地区：[1]广东省热管理工程与材料重点实验室清华大学深圳研究生院,广东深圳518055

出　　处：《化学工程师》2018年第9期5-8,15,共5页Chemical Engineer

基　　金：国家重点基础研究发展计划(973)(2014CB932400);广东省重点实验室(2014B030301005);深圳市基础研究

摘　　要：炭气凝胶是一种具有高比表面积和高导电性的多孔炭材料,本研究采用炭气凝胶作为负极添加剂来改善铅酸电池性能。实验添加的炭气凝胶的质量占铅粉质量的3%。在循环伏安测试中,加入炭气凝胶的铅酸电池负极的氧化和还原反应峰值电流增大。在恒电流放电测试中,根据理论值设定的放电倍率为1C时,加入炭气凝胶后的放电容量达到了190mAh·g^(-1),比不添加时提高了50%。1C充电时,加入炭气凝胶后的充电容量达到了230mAh·g^(-1),比不添加时提高了21%。在3C倍率下添加炭气凝胶的电池的放电和充电容量也都高于不添加的电池。结果证明炭气凝胶改善了铅酸电池负极充放电性能,提高了电池的库伦效率。Carbon aerogel is a kind of porous carbon material with high specific surface area and high conductivity. In this study, carbon aerogel was used as a negative electrode additive to improve the performance of leadacid batteries. The amount of carbon aerogel added in the experiment accounted for 3% of the lead powder quality. In the cyclic voltammetry test, the peak current of the oxidation and reduction reactions of the negative electrode of the lead-acid battery with carbon aerogel added increased.In the galvanostatic discharge test, when the discharge rate set according to the theoretical value was 1 C, the discharge capacity after the addition of the carbon aerogel reached 190 mAh·g-1, which was 50% higher than that when the carbon aerogel was not added. When charged at 1C, the charging capacity after adding carbon aerogel reached 230 mAh·g-1, which was 21% higher than when no carbon was added. The discharge and charge capacity of the battery with the carbon aerogel added at the 3 C rate are also higher than those of the non-added battery. The results prove that the carbon aerogel improves the negative electrode charge-discharge performance of the lead-acid battery and improves the coulombic efficiency of the battery.

关 键 词：铅酸电池 炭气凝胶 电化学性能 

分 类 号：TM911.1[电气工程—电力电子与电力传动]