Статья

Ultra-high Areal Capacity Realized in Three-Dimensional Holey Graphene/SnO2 Composite Anodes

Junfei LiangDepartment of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA; Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA; School of Energy and Power Engineering, North University of China, Shanxi, Taiyuan 030051, P. R. ChinaHongtao SunDepartment of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA; Department of Industrial and Manufacturing Engineering, The Pennsylvania State University, University Park, PA 16802-4400, USAZipeng ZhaoDepartment of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USAYiliu WangDepartment of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USAZhiying FengDepartment of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USAJian ZhuDepartment of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA; College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, ChinaLin GuoSchool of Chemistry, Beihang University, Beijing 100191, China. Electronic address: [email protected]Yu HuangDepartment of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA; California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA. Electronic address: [email protected]Xiangfeng DuanDepartment of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA; California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA. Electronic address: [email protected]

2019en

ABI

Аннотация

Nanostructured alloy-type electrode materials and its composites have shown extraordinary promise for lithium-ion batteries (LIBs) with exceptional gravimetric capacity. However, studies to date are usually limited to laboratory cells with too low mass loading (and thus too low areal capacity) to exert significant practical impact. Herein, by impregnating micrometer-sized SnO2/graphene composites into 3D holey graphene frameworks (HGF), we show that a well-designed 3D-HGF/SnO2 composite anode with a high mass loading of 12 mg cm−2 can deliver an ultra-high areal capacity up to 14.5 mAh cm−2 under current density of 0.2 mA cm−2 and stable areal capacity of 9.5 mAh cm−2 under current density of 2.4 mA cm−2, considerably outperforming those in the state-of-art research devices or commercial devices. This robust realization of high areal capacity defines a critical step to capturing the full potential of high-capacity alloy-type electrode materials in practical LIBs.

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Идентификаторы

DOI: 10.1016/j.isci.2019.08.025

Цитирования и источники

Цитирований: 2Использованных источников: 0

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