高比能长寿命磷酸铁锂电池正极导电剂选择  

Selection of Cathode Conductive Agent for High Specific Energy and Long Life LiFePO_(4) Battery

作　　者：张芳平 相佳媛[1] 项良顺 屠芳芳 茆志友 周井 谢跃 ZHANG Fangping;XIANG Jiayuan;XIANG Liangshun;TU Fangfang;MAO Zhiyou;ZHOU Jing;XIE Yue(Zhejiang Narada Power Source Co.,Ltd.,Hangzhou,Zhejiang 310000,China)

机构地区：[1]浙江南都电源动力股份有限公司,浙江杭州310000

出　　处：《浙江化工》2024年第6期7-13,共7页Zhejiang Chemical Industry

摘　　要：为改善磷酸铁锂电池体系的动力学性能,助力储能领域长循环铁锂电池的开发,本文分别以一定质量占比的导电炭黑(SP)、碳纳米管(CNTs)、石墨烯(GN)及SP&CNTs、SP&GN 5种方案作磷酸铁锂电池正极的导电剂,通过对比不同方案正极片厚度变化、电池倍率、低温、自放电和循环充放电等性能,研究不同导电剂对电池加工和电性能的影响。结果表明,复合二元导电剂比单一导电剂具有更好的电性能,0.5%SP+1.0%CNTs方案因同时具有高电子电导率和离子电导率而表现出最优的循环性能。In order to improve the kinetic performance of lithium iron phosphate battery system and help the development of long-cycle lithium iron battery in the field of energy storage,in this paper,five schemes of conductive carbon black(SP),carbon nanotubes(CNTs),graphene(GN),SP&CNTs and SP&GN with a certain mass proportion were used as the conductive agent for the cathode of lithium iron phosphate battery.The results show that the composite binary conductive agent has better electrical performance than the single conductive agent,and the 0.5% SP+1.0% CNTs scheme exhibits the best cycling performance due to its high electronic conductivity and ionic conductivity at the same time.

关 键 词：磷酸铁锂电池 长寿命 导电剂 导电炭黑 碳纳米管 石墨烯 极片厚度 自放电 

分 类 号：TM912[电气工程—电力电子与电力传动] O646[理学—物理化学]