Caging tin oxide in three-dimensional graphene networks for superior volumetric lithium storage

Junwei Han, Debin Kong, Wei Lv, Dai-Ming Tang, Daliang Han, Chao Zhang, Donghai Liu, Zhichang Xiao, Xinghao Zhang, Jing Xiao, Xinzi He, Feng-Chun Hsia, Chen Zhang, Ying Tao, Dmitri Golberg, Feiyu Kang, Linjie Zhi and Quan-Hong Yang ()
Additional contact information
Junwei Han: Tianjin University
Debin Kong: CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology
Wei Lv: Tsinghua University
Dai-Ming Tang: National Institute for Materials Science (NIMS)
Daliang Han: Tianjin University
Chao Zhang: Queensland University of Technology (QUT)
Donghai Liu: Tianjin University
Zhichang Xiao: CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology
Xinghao Zhang: CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology
Jing Xiao: Tianjin University
Xinzi He: Tianjin University
Feng-Chun Hsia: National Institute for Materials Science (NIMS)
Chen Zhang: Tianjin University
Ying Tao: Tianjin University
Dmitri Golberg: National Institute for Materials Science (NIMS)
Feiyu Kang: Tsinghua University
Linjie Zhi: CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology
Quan-Hong Yang: Tianjin University

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract Tin and its compounds hold promise for the development of high-capacity anode materials that could replace graphitic carbon used in current lithium-ion batteries. However, the introduced porosity in current electrode designs to buffer the volume changes of active materials during cycling does not afford high volumetric performance. Here, we show a strategy leveraging a sulfur sacrificial agent for controlled utility of void space in a tin oxide/graphene composite anode. In a typical synthesis using the capillary drying of graphene hydrogels, sulfur is employed with hard tin oxide nanoparticles inside the contraction hydrogels. The resultant graphene-caged tin oxide delivers an ultrahigh volumetric capacity of 2123 mAh cm–3 together with good cycling stability. Our results suggest not only a conversion-type composite anode that allows for good electrochemical characteristics, but also a general synthetic means to engineering the packing density of graphene nanosheets for high energy storage capabilities in small volumes.

Date: 2018
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DOI: 10.1038/s41467-017-02808-2

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