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

Junfei Liang; Hongtao Sun; Zipeng Zhao; Yiliu Wang; Zhiying Feng; Jian Zhu; Lin Guo; Yu Huang; Xiangfeng Duan

iScience (Sep 2019)

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

Junfei Liang,
Hongtao Sun,
Zipeng Zhao,
Yiliu Wang,
Zhiying Feng,
Jian Zhu,
Lin Guo,
Yu Huang,
Xiangfeng Duan

Affiliations

Junfei Liang: Department 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. China
Hongtao Sun: Department 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, USA
Zipeng Zhao: Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA
Yiliu Wang: Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA
Zhiying Feng: Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA
Jian Zhu: Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA; College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
Lin Guo: School of Chemistry, Beihang University, Beijing 100191, China; Corresponding author
Yu Huang: Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA; California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA; Corresponding author
Xiangfeng Duan: Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA; California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA; Corresponding author

Journal volume & issue: Vol. 19
pp. 728 – 736

Abstract

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Summary: 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. : Energy Storage; Nanomaterials; Energy Materials Subject Areas: Energy Storage, Nanomaterials, Energy Materials

Published in iScience

ISSN: 2589-0042 (Online)
Publisher: Elsevier
Country of publisher: United States
LCC subjects: Science
Website: http://www.cell.com/iscience/home

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