Constructing LiF-Enriched Solid Electrolyte Interface on Graphene Arrays with Abundant Edges on Microscale Si-C Anodes Toward High-Energy Lithium-Ion Batteries

Ge, Ke1; Wang, Zhenhong2; Liu, Jie3,4; Mu, Yongbiao3,4; Wang, Rui5; Xu, Xiaoqian3,4; Wang, Yichun3,4; Zou, Zhiyu3,4; Zhang, Qing3,4; Han, Meisheng3,4; Zeng, Lin3,4

2024-09-01

10.1002/adfm.202414384

ADVANCED FUNCTIONAL MATERIALS   影响因子和分区

1616-301X

1616-3028

Silicon (Si) anodes offer excellent lithium storage capacity for lithium-ion batteries but face practical limitations due to significant volume expansion and low intrinsic electrical conductivity. These issues lead to side reactions that consume the electrolyte and impede ion-electron transport, resulting in low areal loading (<2 mg cm(-2)) and restricted energy density. To address this, a scalable method is developed using spray drying of commercial graphite flakes (s-Gr) and nanosilicon particles (n-Si), followed by chemical vapor deposition to create microscale Si/C anodes (s-Gr/n-Si/VGs). Thin vertical graphene nanosheets (VGs) are grown on the surfaces and within the internal pores, forming a robust, micron-sized Si/C spherical composite material. The VGs construct the conductive network, allowing the electrodes to operate at high areal loadings without pulverization and promoting LiF-enriched solid electrolyte interphase for improved cycling stability. The s-Gr/n-Si/VGs maintain a capacity of 641.9 mAh g(-1) after 1000 cycles at 11.0 mg cm(-2), retaining 95.9% capacity. In pouch cells with NCM811 cathodes, the 5.0 Ah-level cells achieved 80.0% capacity retention after 510 cycles at 1.0 C. This research provides a feasible pathway for manufacturing high-performance, low-cost, and scalable Si/C anodes suitable for high-energy-density lithium-ion batteries.

high-energy-density LiF-riched solid electrolyte interphase lithium-ion batteries vertical graphene nanosheets

SCI

英语

通讯

National Natural Science Foundation of China[22309078] ; Shenzhen Science and Technology Plan Project[SGDX20230116091644003] ; High level of special funds[G03034K001] ; null[2023B0303000002]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001325147000001

WILEY-V C H VERLAG GMBH

Web of Science

1.Jiangsu Higee Energy Co Ltd, Jiangyin 214400, Peoples R China
2.CNNC China Nucl Power Engn Co Ltd, Zhengzhou Branch, Zhengzhou 450000, Peoples R China
3.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, SUSTech Energy Inst Carbon Neutral, Shenzhen 518055, Peoples R China
5.Univ Cambridge, Dept Engn, 17 Charles Babbage Rd, Cambridge CB30FS, England

Ge, Ke,Wang, Zhenhong,Liu, Jie,et al. Constructing LiF-Enriched Solid Electrolyte Interface on Graphene Arrays with Abundant Edges on Microscale Si-C Anodes Toward High-Energy Lithium-Ion Batteries[J]. ADVANCED FUNCTIONAL MATERIALS,2024.

Ge, Ke.,Wang, Zhenhong.,Liu, Jie.,Mu, Yongbiao.,Wang, Rui.,...&Zeng, Lin.(2024).Constructing LiF-Enriched Solid Electrolyte Interface on Graphene Arrays with Abundant Edges on Microscale Si-C Anodes Toward High-Energy Lithium-Ion Batteries.ADVANCED FUNCTIONAL MATERIALS.

Ge, Ke,et al."Constructing LiF-Enriched Solid Electrolyte Interface on Graphene Arrays with Abundant Edges on Microscale Si-C Anodes Toward High-Energy Lithium-Ion Batteries".ADVANCED FUNCTIONAL MATERIALS (2024).