Performance Study of Graphite Anode Slurry in Lithium-ion Flow Battery by Ball Milling

• Main Authors: FENG Cai-mei, GONG Yu, CHEN Yong-chong, LIU Dan-dan, ZHANG Ping
• Format: Article
• Language: zho
• Published: Journal of Materials Engineering 2018-02-01
• Series: Journal of Materials Engineering
• Subjects: lithium-ion flow battery; graphite; anode slurry; ball milling
• Online Access: http://jme.biam.ac.cn/CN/Y2018/V46/I2/1
• ISSN: 1001-4381; 1001-4381

Graphite anode slurry of lithium-ion flow battery was prepared by the method of ball milling. The morphology, conductivity, specific capacity and cycle performance of graphite anode slurry were studied. Results show that the addition of conductive carbon material can improve the suspension stability of the electrode slurry; the ball milling process can not only improve the suspension stability but also reduce the resistivity of the mixed powders of graphite and conductive carbon materials, the ball milling effect is satisfactory when the mass ratio of the balls and the solid particles is 5:1, but too high ratio of the milling ball and the solid materials can destroy the layer structure of the graphite and affect the stability of the slurry. Increasing the fraction of the graphite and conductive carbon materials can form stable electrical network structure in the slurry and improve the reversible capacity; at the premise of keeping the flowability of the electrode slurry, the reversible specific capacity can be more than 40mAh/g. The capacity loss of graphite anode slurry mainly occurs in the first charging-discharging process, as the increase of the cycles, the capacity loss rate decreases, the capacity goes stable after 5 cycles.