Conductivity and electrochemical performance of LiFePO4 slurry in the lithium slurry battery

4th International Conference on Advanced Composite Materials and Manufacturing Engineering 2017

材料科学;化学

Feng, Caimei^1,2 ; Chen, Yongchong^1,2 ; Liu, Dandan^1 ; Zhang, Ping^3

Energy Storage Technology Research Group, Institute of Electrical Engineering, Chinese Academy of Science, Beijing

100190, China^1

University of Chinese Academy of Sciences, Beijing

100049, China^2

Beijing Hawaga Power Storage Technology Company Ltd., Beijing

100085, China^3

关键词: Active material;    Charge discharge testing;    Electrochemical performance;    Liquid electrolytes;    Specific capacities;    Storage technique;    Theoretical values;    Volume ratio;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/207/1/012076/pdf
DOI  :  10.1088/1757-899X/207/1/012076

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Lithium slurry battery is a new type of energy storage technique which uses the slurry of solid active materials, conductive additions and liquid electrolyte as the electrode. The proportion of conductive addition and the active material has significant influence on the conductivity and electrochemical performance of the slurry electrode. In the present work, slurries with different volume ratios of LiFePO4 (LFP) and Ketjenblack (KB) were investigated by the electrochemical workstation and charge-discharge testing system (vs. Li/Li+). Results show that the conductivity of the slurry increases linearly with the addition of KB, and the measured specific capacity of the slurry reaches its theoretical value when the volume ratio of KB to LFP is around 0.2. Based on this ratio, a slurry battery with higher loading of LFP (19.1 wt.% in the slurry) was tested, and a specific capacity of 165 mAh/g at 0.2 mA/cm2 and 102 mAh/g at 5 mA/cm2 was obtained for LFP.