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《工程(英文)》 >> 2022年 第19卷 第12期 doi: 10.1016/j.eng.2022.05.020

用于锂离子电池的富醚/酯/氟黏结剂配方

a China Tobacco Sichuan Industrial Co., Ltd., Chengdu 610066, China
b Sichuan Sanlian New Material Co., Ltd., Chengdu 610041, China
c Key Laboratory of Biomass Chemical Engineering of the Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
d School of Metallurgy and Environment, Central South University, Changsha 410083, China

收稿日期 :2020-03-31 修回日期 :2022-05-10 录用日期 : 2022-05-20 发布日期 :2022-10-18

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摘要

Practical application of a Si anode in a high-energy-density battery cannot be achieved due to the huge volume expansion of these anodes. Researchers have focused on adding binders to the anode to restrict volume expansion in order to address this issue, as the hydrogen bonds and mechanical properties of binders can be used to enhance adhesion and accommodate the volume changes of a Si anode. Herein, we comprehensively consider binders’ hydrogen bonds, mechanical properties, stability, and compatibility with the electrolyte solution, and design an ether-/ester-/fluorine-rich composite polymer, P(TFEMA-co-IBVE). The proposed binder formula possesses outstanding stability, adhesion, and mechanical strength; moreover, it can accommodate the dramatic volume changes of a Si electrode and exhibits excellent electrochemical performance, achieving a high areal capacity of about 5.4 mA∙h∙cm−2. This novel polymer design may be applied to other electrode materials in the next generation of lithium-ion batteries.

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