An Ion-Conductive Grafted Polymeric Binder with Practical Loading for Silicon Anode with High Interfacial Stability in Lithium-Ion Batteries

Zeheng Li; Gu Wu; Yajun YangZhengwei WanXiaoming ZengLijing YanShuxing WuMin LingChengdu LiangKwun Nam HuiZhan Lin

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An Ion-Conductive Grafted Polymeric Binder with Practical Loading for Silicon Anode with High Interfacial Stability in Lithium-Ion Batteries

机译：An Ion-Conductive Grafted Polymeric Binder with Practical Loading for Silicon Anode with High Interfacial Stability in Lithium-Ion Batteries

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Binders are required to dissipate huge mechanical stress and enhance thelithium-ion diffusion kinetics of silicon anodes during cycling. Herein, a stressdistributionbinder with high ionic conductivity (GG-g-PAM) is constructed bygrating polyacrylamide (PAM) onto ion-conductive guar gum (GG) backbone.The mechanical stress distribution toward the grafted PAM chain enablesthe effective stress dissipation of the GG-g-PAM binder, and thus maintainsa stable electrode-electrolyte interface during cycling. The stress dissipationability of the GG-g-PAM binder is confirmed by PeakForce atomic force microscopyexperiments and finite element simulations. In addition, lithium complexationsites provided by oxygen heteroatoms in GG of the GG-g-PAM binderconstruct the Li-ion pathways for facilitating Li ionic diffusion in the Si anodes.The good cyclabilities of Ah-level pouch cells based on Si nanoparticle anodesstrongly confirm GG-g-PAM as a desirable binder for practical Si anodes.

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来源
《Advanced energy materials》 |2022年第29期|2201197.1-2201197.12|共12页
作者
Zeheng Li; Gu Wu; Yajun YangZhengwei WanXiaoming ZengLijing YanShuxing WuMin LingChengdu LiangKwun Nam HuiZhan Lin;
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作者单位

Zhejiang Provincial Key Laboratory of Advanced ChemicalEngineering Manufacture TechnologyCollege of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027, China;

School of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou 510006, China;

College of Materials and ChemistryChina Jiliang UniversityHangzhou 310018, ChinaSchool of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou 510006, ChinaE-mail: zhanlin@gdut.edu.cnJoint Key Laboratory of the Ministry of EducationInstitute of Applied Physics and Materials EngineeringUniversity of MacauAvenida da Universidade, Taipa, Macau SAR 999078, P. R. China;

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正文语种英语
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Ah-level pouch cells; lean binder content; lithium-ion batteries; silicon nanoparticle anodes; stress distribution binders;

An Ion-Conductive Grafted Polymeric Binder with Practical Loading for Silicon Anode with High Interfacial Stability in Lithium-Ion Batteries

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