Three-Dimensional Crosslinked PAA-TA Hybrid Binders for Long-Cycle-Life SiOx Anodes in Lithium-Ion Batteries

Weiting Tang; Li Feng; Xiujuan Wei; Guoyong Lai; Haopeng Chen; Zeheng Li; Xiuhuan Huang; Shuxing Wu; Zhan Lin

doi:10.1021/acsami.2c19344

Three-Dimensional Crosslinked PAA-TA Hybrid Binders for Long-Cycle-Life SiO_x Anodes in Lithium-Ion Batteries

ACS Appl Mater Interfaces. 2022 Dec 28;14(51):56910-56918. doi: 10.1021/acsami.2c19344. Epub 2022 Dec 14.

Authors

Weiting Tang¹, Li Feng², Xiujuan Wei¹, Guoyong Lai¹, Haopeng Chen¹, Zeheng Li³, Xiuhuan Huang¹, Shuxing Wu¹, Zhan Lin¹

Affiliations

¹ Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
² School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China.
³ Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.

PMID: 36515974
DOI: 10.1021/acsami.2c19344

Abstract

The large volume expansion hinders the commercial application of silicon oxide (SiO_x) anodes in lithium-ion batteries. Recent studies show that binders play a vital role in mitigating the volume change of SiO_x electrodes. Herein, we introduce the small molecule tannic acid (TA) with high branching into the linear poly(acrylic acid) (PAA) binder for SiO_x anodes. The three-dimensional (3D) crosslinked network with multiple hydrogen bonds is formed by the incorporation of abundant hydroxyl groups with unique carboxyl groups, which increases the interfacial adhesive strength with SiO_x particles. As a consequence, SiO_x electrodes based on the PAA-TA binder show an excellent cycling performance with a high specific capacity of 1025 mA h g^-1 at 500 mA g^-1 after 250 cycles. Moreover, the SiO_x||NCM811 full cell exhibits a reversible capacity of 143 mA h g^-1 corresponding to 87.4% capacity retention after 100 cycles.

Keywords: PAA-TA binder; SiOx anode; hydrogen bonding; lithium-ion batteries; long cycle life.