Lithiation Depth Regulation of Silicon Anodes toward Excellent Stability.

Yang, Xuming; Tang, Shengrui; Li, Liewu; He, Yaqi; Li, Menghao; Wei, Xianbin; Hu, Jiangtao; Wang, Jionghui; Ouyang, Xiaoping; Gu, M Danny; Zhang, Qianlin; Liu, Jianhong

Yang, Xuming; Tang, Shengrui; Li, Liewu; He, Yaqi; Li, Menghao; Wei, Xianbin; Hu, Jiangtao; Wang, Jionghui; Ouyang, Xiaoping; Gu, M Danny; Zhang, Qianlin; Liu, Jianhong.

Afiliação

Yang X; Graphene Composite Research Center, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China.
Tang S; Graphene Composite Research Center, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China.
Li L; Graphene Composite Research Center, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China.
He Y; Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
Li M; Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
Wei X; Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
Hu J; Graphene Composite Research Center, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China.
Wang J; Minmetals Exploration & Development Co. Ltd, Beijing 100010, China.
Ouyang X; School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, China.
Gu MD; Eastern Institute for Advanced Study, Eastern Institute of Technology, Ningbo, Zhejiang 315200, China.
Zhang Q; Graphene Composite Research Center, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China.
Liu J; Graphene Composite Research Center, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China.

J Phys Chem Lett ; 15(28): 7320-7326, 2024 Jul 18.

Article em En | MEDLINE | ID: mdl-38985009

ABSTRACT

ABSTRACT

Silicon (Si) is an appealing choice of anode for next-generation lithium ion batteries with high energy density, but its dramatic volume expansion makes it a tremendous challenge to achieve acceptable stability. Herein, we demonstrate that no capacity decay is observed during the testing period when the lithiation depth of Si nanoparticles is regulated at 2000 mAh g-1 or below, the fracture of Si anode films is well mitigated under suitable regulation of lithiation depth, and the cycled Si remains particulate without turning flocculent as under full lithiation. In addition, the solid electrolyte interphase (SEI) with a LiF-dominated outer region produced under lithiation regulation could better passivate the Si anodes and prevent further electrolyte decomposition than the mosaic-type SEI formed under full lithiation. Regulating lithiation depth proved to be a feasible solution to the pressing volume issues, and optimization of capacity utilization should be considered as much as materials-level optimization.

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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: J Phys Chem Lett Ano de publicação: 2024 Tipo de documento: Article País de afiliação: China País de publicação: Estados Unidos

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