Silicon monoxide (SiO) is an attractive anode material for next-generation lithium-ion batteries for its ultra-high theoreti-cal capacity of 2680 mAh -g?1. The studies to date have been limited to electrodes with a rela-tively low mass loading (< 3.5 mg -cm?2), which has seriously restricted the areal capacity and its potential in practical devices. Maximizing areal capacity with such high-capacity materials is critical for capitalizing their potential in practi-cal technologies. Herein, we report a monolithic three-dimensional (3D) large-sheet holey gra-phene framework/SiO (LHGF/SiO) composite for high-mass-loading electrode. By specifically using large-sheet holey graphene building blocks, we construct LHGF with super-elasticity and exceptional mechanical robustness, which is essential for accommodating the large volume change of SiO and ensuring the structure integrity even at ultrahigh mass loading. Addi-tionally, the 3D porous graphene network structure in LHGF ensures excellent electron and ion transport. By systematically tailoring microstructure design, we show the LHGF/SiO anode with a mass loading of 44 mg -cm?2 delivers a high areal capacity of 35.4 mAh -cm?2 at a current of 8.8 mA -cm?2 and retains a capacity of 10.6 mAh -cm?2 at 17.6 mA -cm?2, greatly exceeding those of the state-of-the-art commercial or research devices. Furthermore, we show an LHGF/SiO anode with an ultra-high mass loading of 94 mg -cm?2 delivers an unprecedented areal capacity up to 140.8 mAh -cm?2. The achievement of such high areal capacities marks a critical step toward realizing the full potential of high-capacity alloy-type electrode materials in practical lithium-ion batteries.

Jiang Zhong;Tao Wang;Lei Wang;Lele Peng;Shubin Fu;Meng Zhang;Jinhui Cao;Xiang Xu;Junfei Liang;Huilong Fei;Xidong Duan;Bingan Lu;Yiliu Wang;Jian Zhu;Xiangfeng Duan

State Key Laboratory for Chemo/Biosensing and Chemometrics,College of Chemistry and Chemical Engineering,School of Physics and Electronics,Hunan Key Laboratory of Two?Dimensional Materials,Engineering Research Center of Advanced Catalysis of the Ministry of Education,Hunan University,Changsha 410082,People's Republic of China;International Graduate School at Shenzhen,Tsinghua University,Shenzhen 518057,People's Republic of China;Key Laboratory of Structures Dynamic Behavior and Control of the Ministry of Education,Key Laboratory of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology,Harbin Institute of Technology,Harbin 150090,People's Republic of China;School of Energy and Power Engineering,North University of China,Taiyuan 030051,People's Republic of China;Department of Chemistry and Biochemistry,University of California,Los Angeles,CA 90095,USA

纳微快报（英文）

[1]Jiang Zhong;Tao Wang;Lei Wang;Lele Peng;Shubin Fu;Meng Zhang;Jinhui Cao;Xiang Xu;Junfei Liang;Huilong Fei;Xidong Duan;Bingan Lu;Yiliu Wang;Jian Zhu;Xiangfeng Duan-.A Silicon Monoxide Lithium?Ion Battery Anode with Ultrahigh Areal Capacity)[J].纳微快报（英文）,2022(03):229-243

Monoxide,Areal,LHGF

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