聚吡咯包覆导电炭黑/氧化铟复合材料的制备及其在铅酸电池中的应用  

Preparation of polypyrrole coated with conductive carbon black/indium oxide composite and its application in lead-acid batteries

作　　者：刘飞 陈远强[1] 刘永川[1] 陈素晶[1] 张易宁[1,2] LIU Fei;CHEN Yuanqiang;LIU Yongchuan;CHEN Sujing;ZHANG Yining(Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院福建物质结构研究所光电材料化学与物理院重点实验室,福州350002 [2]中国科学院大学,北京100049

出　　处：《复合材料学报》2022年第12期5747-5757,共11页Acta Materiae Compositae Sinica

基　　金：中科院STS区域重点项目(KFJ-STS-QYZD-2021-09-001);福建省STS计划配套项目(2021T3036,2020T3004,2019T3017,2020T3030);福建省引导性项目(2020H0040);泉州市科技项目(2020G17)。

摘　　要：为了改善铅酸电池负极不可逆硫酸盐化及析氢问题,通过原位化学聚合的方法制备导电炭黑/氧化铟表面包覆聚吡咯[PPy@(C/In_(2)O_(3))]复合材料,采用SEM、FTIR、BET和XRD等表征手段分别对复合材料的微观形貌和结构进行分析;通过循环伏安法(CV)和线性扫描法(LSV)测试了复合材料的电化学性能。最后,将PPy@(C/In_(2)O_(3))复合材料添加到铅酸电池负极活性材料中,探究PPy@(C/In_(2)O_(3))对铅酸电池高倍率部分荷电状态(HRPSoC)循环寿命及放电容量的影响。结果表明:PPy@(C/In_(2)O_(3))保留了导电炭黑的基本结构特征,具有较大比表面积;同时具有较高析氢过电位及较大比容量。当将PPy@(C/In_(2)O_(3))复合材料添加到铅酸电池负极活性材料中,不仅可以降低负极板内阻抑制电池的负极硫酸盐化问题,而且可以减弱电池负极析氢问题,在提高铅酸电池放电容量同时,显著提高了铅酸电池高倍率部分荷电状态循环寿命。最终,含有PPy@(C/In_(2)O_(3))的负极板的铅酸电池显示出了优异的HRPSoC循环寿命,较空白组电池循环寿命提高了1.78倍。In order to improve the irreversible sulfation and hydrogen evolution of the negative electrode of leadacid batteries,in this study,the olypyrrole coated with conductive carbon black/indium oxide composite[PPy@(C/In_(2)O_(3))]were prepared by in-situ oxidation polymerization on C/In_(2)O_(3).The composite materials were characterized by SEM,FTIR,BET and XRD.The electrochemical performance of the composites was analyzed by CV and LSV.Finally,the PPy@(C/In_(2)O_(3))composite materials were added in the negative active material of lead-acid batteries.The effect of composite materials on the high-rate partial-state-of-charge(HRPSoC)performance of leadacid batteries was investigated.The results show that the PPy@(C/In_(2)O_(3))retain the structural feature of C,and have larger specific surface area than PPy,and have higher hydrogen evolution over-potential and capacitance than C.When PPy@(C/In_(2)O_(3))composite materials were added to the negative active material of the lead-acid batteries,it can not only reduce the internal resistance of the negative plate and inhibit the negative sulfation problem of the batteries,but also reduce the hydrogen evolution problem of the negative electrode of the batteries.At the same time,the discharge capacity significantly improves the cycle life of the lead-acid batteries under the HRPSoC operation.Finally,the lead-acid batteries containing the negative plate of PPy@(C/In_(2)O_(3))show excellent HRPSoC cycle life which increased by 1.78 times compared with the cycle life of the blank battery.

关 键 词：聚吡咯包覆导电炭黑/氧化铟复合材料 硫酸盐化 析氢 高倍率部分荷电状态 铅酸电池 

分 类 号：TB3333[一般工业技术—材料科学与工程] TQ152[化学工程—电化学工业]