Ether-/Ester-/Fluorine-Rich Binding Emulsion Formula for Lithium-Ion Batteries
Xianqing Zeng,
Donglin Han,
Zeheng Li,
Hongxun Wang,
Gu Wu,
Yong Deng,
Kai Liu,
Li Xie,
Chengdu Liang,
Min Ling,
Yuchuan Huang
Affiliations
Xianqing Zeng
China Tobacco Sichuan Industrial Co., Ltd., Chengdu 610066, China; Key Laboratory of Biomass Chemical Engineering of the Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
Donglin Han
China Tobacco Sichuan Industrial Co., Ltd., Chengdu 610066, China
Zeheng Li
Key Laboratory of Biomass Chemical Engineering of the Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
Hongxun Wang
School of Metallurgy and Environment, Central South University, Changsha 410083, China
Gu Wu
Key Laboratory of Biomass Chemical Engineering of the Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
Yong Deng
Sichuan Sanlian New Material Co., Ltd., Chengdu 610041, China
Kai Liu
Sichuan Sanlian New Material Co., Ltd., Chengdu 610041, China
Li Xie
Sichuan Sanlian New Material Co., Ltd., Chengdu 610041, China
Chengdu Liang
Key Laboratory of Biomass Chemical Engineering of the Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
Min Ling
Key Laboratory of Biomass Chemical Engineering of the Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China; Corresponding authors.
Yuchuan Huang
China Tobacco Sichuan Industrial Co., Ltd., Chengdu 610066, China; Sichuan Sanlian New Material Co., Ltd., Chengdu 610041, China; Corresponding authors.
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 binders of 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, named 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.
