Partially Carbonized Polymer Binder with Polymer Dots for Silicon Anodes in Lithium‐Ion Batteries

Autor: Zhuoying Wu, Zhengwei Wan, Zeheng Li, Qiaokun Du, Tong Wu, Jun Cao, Min Ling, Chengdu Liang, Yuanzhong Tan
Rok vydání: 2022
Předmět:
Zdroj: Small. 19:2205065
ISSN: 1613-6829
1613-6810
Popis: Large-scale applications of conventional conductive binders for silicon (Si) anodes are challenging to accomplish due to their complex synthesis steps and high cost. Herein, a carbonized polymer dots-assisted polyvinyl alcohol-chitosan (PVA-CS-CPDs) binder is developed through a simple and low-cost hydrothermal method. Through rational design, the PVA-CS-CPDs binder retains rich polar groups while forming conjugated structures. The conjugated structure endows the PVA-CS-CPDs with high electronic conductivity, and the retained polar groups maintain strong binding strength. The proposed water-soluble binding system acts as both a binder and conductive additive, enabling stable cycling for high-Si-content (90 wt.%) anodes without any other conductive additives.
Databáze: OpenAIRE
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