Modulation of ion-conducting groups in aqueous terpolymer binders to boost the electrochemical performance of silicon-based anodes

Cheng, Dejian1; Li, Zenan2; Ni, Peilong1; Wang, Xinying3; Luo, Dong1; Xia, Yinghao1; Zhang, Guangzhao2; Li, Zhenghui3; Wang, Chaoyang1

2024-09-15

10.1016/j.jpowsour.2024.235025

JOURNAL OF POWER SOURCES   影响因子和分区

0378-7753

1873-2755

Silicon anodes hold great promise for the next-generation energy dense lithium-ion batteries (LIBs) due to their high specific capacity, yet the capacity of silicon anodes rapidly decays during repeated charge/discharge processes, which can hardly be alleviated via conventional binders due to the poor mechanical properties, insufficient ion/electronic conduction, and weak adhesion force. Herein, a random terpolymer (AMS) with fast ion transport and robust adhesion force was developed via the radical polymerization of acrylic acid (AA), acrylamide (AM) and 2-acrylamide-2-methylpropanesulfonic acid (AMPS), and used as aqueous binder for silicon/ graphite (Si/C) anodes. The carboxyl and amide groups from AA and AM can form numerous of hydrogen bonds with the silicon particles, leading to a strong adhesion effect, while the sulfonic acid groups can construct fast channels for the rapid transport of lithium ions. Finally, the Si/C anode using the AMS411 binder delivers a high specific capacity of 322.48 mAh g-1 along with the superior operation stability at 0.5C (high-capacity retention ratio of 80.8 % after 500 cycles). This work provides that the incorporation of specific functional groups effectively enhances the overall electrochemical performance of the silicon-based anodes.

Aqueous binder Terpolymer Functional groups Si/C anodes Lithium -ion battery

SCI ; EI

英语

通讯

National Natural Science Foundation of China["22275059","22305115"] ; Opening Project of Key Laboratory of Polymer Processing Engineering[KFKT2302] ; Shenzhen Science and Technology Major Project[KJZD20230923114222046]

Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:001267701200001

ELSEVIER

20242816660948

Acrylic monomers ; Adhesion ; Amides ; Anodes ; Ascorbic acid ; Binders ; Carboxylic acids ; Hydrogen bonds ; Ions ; Lithium-ion batteries ; Silicon batteries

Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Electric Batteries:702.1 ; Electron Tubes:714.1 ; Physical Chemistry:801.4 ; Chemical Agents and Basic Industrial Chemicals:803 ; Organic Compounds:804.1 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.South China Univ Technol, Res Inst Mat Sci, Key Lab Polymer Proc Engn, Guangzhou 510640, Peoples R China
2.Southern Univ Sci & Technol, Sch Innovat & Entrepreneurship, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Peoples R China

Cheng, Dejian,Li, Zenan,Ni, Peilong,et al. Modulation of ion-conducting groups in aqueous terpolymer binders to boost the electrochemical performance of silicon-based anodes[J]. JOURNAL OF POWER SOURCES,2024,614.

Cheng, Dejian.,Li, Zenan.,Ni, Peilong.,Wang, Xinying.,Luo, Dong.,...&Wang, Chaoyang.(2024).Modulation of ion-conducting groups in aqueous terpolymer binders to boost the electrochemical performance of silicon-based anodes.JOURNAL OF POWER SOURCES,614.

Cheng, Dejian,et al."Modulation of ion-conducting groups in aqueous terpolymer binders to boost the electrochemical performance of silicon-based anodes".JOURNAL OF POWER SOURCES 614(2024).