摘要
锂浆料电池由于其成本低、寿命长、容量和输出功率可独立设计等优点,在大规模储能领域具有广阔的应用前景.电极浆料作为锂浆料电池的重要组分,其导电性与流变性对电池电化学性能具有重要影响.本文以锂离子电池常用的磷酸铁锂为正极活性物质,探究了不同导电剂种类及添加量对正极浆料导电性和流变性的影响.通过对比不同正极浆料的悬浮稳定性、粘度以及导电性,确定出1.0 wt.%科琴黑添加量的浆料性能较为突出.基于该正极浆料的锂浆料流动电池能够稳定循环450 h.本工作将为锂浆料电池导电剂的选择提供指导.
Lithium slurry batteries are promising large-scale energy-storage devices because of their low cost,long life,and independent scalability of energy and power capabilities.Electrode slurry is the main component of lithium slurry batteries and its conductive and rheological properties play an important role in the electrochemical performance of batteries.Herein,the types and amounts of conductive additives on the conductivity and rheology of LiFePO_(4)-based cathode slurry were investigated.By comparing the viscosity,suspension stability and conductivity of different cathode slurries,the 1.0 wt.%LFP–KB cathode slurry displayed a better electrochemical performance.Based on this cathode slurry,the lithium slurry batteries exhibited a stable cycle performance over 450 h.This work provides a guidance to select conductive additives for lithium slurry batteries.
作者
辛本舰
王瑞
胡阳
刘丽丽
牛志强
Benjian Xin;Rui Wang;Yang Hu;Lili Liu;Zhiqiang Niu(Tianjin Key Laboratory for Photoelectric Materials and Devices,School of Materials Science and Engineering,Tianjin University of Technology,Tianjin 300384,China;Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Renewable Energy Conversion and Storage Center,Haihe Laboratory of Sustainable Chemical Transformations,College of Chemistry,Nankai University,Tianjin 300071,China)
出处
《中国科学：化学》
CAS
CSCD
北大核心
2022年第7期1148-1155,共8页
SCIENTIA SINICA Chimica
基金
国家重点研发计划(编号:2019YFA0705600)
国家自然科学基金委(编号:21875121,51972231)
天津市自然科学基金委(编号:18JCJQJC46300,19JCZDJC31900)
中国博士后科学基金(编号:2019M650045)
南开大学新物质创造前沿科学中心(编号:63181206)资助项目。
关键词
锂浆料电池
导电剂
科琴黑
碳纳米管
石墨烯
lithium slurry batteries
conductive additives
ketjen black
carbon nanotubes
graphene
