首页|A Web-like Three-dimensional Binder for Silicon Anode in Lithium-ion Batteries

A Web-like Three-dimensional Binder for Silicon Anode in Lithium-ion Batteries

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Si anode is of paramount importance for advanced energy-dense lithium-ion batteries(LIBs).However,the large volume change as well as stress generates during its lithiation-delithiation process poses a great challenge to the long-term cycling and hindering its application.Herein this work,a composite binder is prepared with a soft component,guar gum(GG),and a rigid linear polymer,anionic polyacrylamide(APAM).Rich hydroxy,carboxyl,and amide groups on the polymer chains not only enable intermolecular crosslinking to form a web-like binder,A2G1,but also realize strong chemical binding as well as physical encapsulating to Si particles.The resultant electrode shows limited thickness change of merely 9％on lithiation and almost recovers its original thickness on delithiation.It demonstrates high reversible capacity of 2104.3 mAh g-1 after 100 cycles at a current density of 1800 mA g-1,and in constant capacity(1000 mAh g-1)test,it also shows a long life of 392 cycles.Therefore,this soft-hard combining web-like binder illustrates its great potential in the future applications.

anionic polyacrylamidelithium-ion batteriesSi anodethickness changeweb-like binder

Liyuan Li、Tao Li、Yifan Sha、Baozeng Ren、Lan Zhang、Suojiang Zhang

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CAS Key Laboratory of Green Process and Engineering,Beijing Key Laboratory of Ionic Liquids Clean Process,State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China

School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China

School of Chemical Engineering,Zhengzhou University Zhengzhou,450001,China

Langfang Green Industrial Technology Center,Langfang 065001,China

Henan Key Laboratory of Energy Storage Materials and Processes,Zhengzhou Institute of Emerging Industrial Technology,Zhengzhou 450003,China

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2024

10.1002/eem2.12482

能源与环境材料(英文)

能源与环境材料(英文)

ISSN：
年,卷(期)：2024.7(1)