An Energy Dissipative Binder for Self‐Tuning Silicon Anodes in Lithium‐Ion Batteries

• DOI: 10.1002/advs.202205443
• Publication Date: 2022-11-17T09:33:04Z
• Authors: Yihong Tong; Siyu Jin; Hongyuan Xu; Jiawei Li; Zhao Kong; Hong Jin; Hui Xu
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy; Research Articles

The volume change of the silicon anode seriously affects electrode integrity and cycle stability. Herein, a binder, GCA13, with energy dissipation function surface stability effect is proposed to enhance life specific capacity. Unlike traditional binders that protect electrodes through long-chain networks, GCA13 introduces citric acid molecules short-range functions on guar gum weak interconnection. This action similar spring, which can effectively buffer particle pulverization caused by change. Therefore, maintain structural integration ignorable cracks alleviated thickness swelling. Thus, Si@GCA13 exhibits high reversible capacity 1184 mAh g-1 under 2 A after 740 cycles latter coulombic efficiency 99.9%. Extraordinarily, benefiting from superior properties shows remarkable cycling low (-15 0 °C) temperatures (60 °C). work demonstrates great potential this binder design strategy achieve overall property promotion Si anodes for practical application even harsh service conditions.