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Preparation of hexagonal ultrathin WO3 nano-ribbons and their electrochemical performance as an anode material in lithium ion batteries

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Nano Research 2016年第2期9卷 435-441页

作者： Chao Lian Xiaoling Xiao Zheng Chen Yuxi Liu Enyue Zhao Dingsheng Wang Chen Chen Yadong Li Department of Chemistry & Collaborative Innovation Center for Nanomaterial Science and Engineering Tsinghua University Beijing 100084 China College of Materials Science and Opto-electronic Technology University of Chinese Academy of Sciences Beijing 100049 China

Hexagonal ultrathin WO3 nano-ribbons （HUWNRs） of subnanometer thicknesses, 2-5 nm widths, and lengths of up to several micrometers were prepared by a solvothermal method. The as-prepared HUWNRs grow along the [001] direction, and the main exposed facet is the （720） crystal plane. The HUWNRs exhibit good electrochemical performance as an anode material in lithium ion batteries because of their unique structure. It is believed that these unique materials may be applied in many fields.

关键词： hexagonal tungsten oxide ultrathin nano-ribbons low-dimensional structure anode materiallithium ion battery

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Mesocrystal Co3O4 nanoplatelets as high capacity anode materials for Li-ion batteries

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Nano Research 2014年第5期7卷 794-803页

作者： Dawei Su Shixue Dou Guoxiu Wang Institute for Superconducting & Electronic Materials University of Wollongong Wollongong NSW 2522 Australia Centre for Clean Energy Technology School of Chemistry and Forensic Science University of Technology Sydney Broadway Sydney NSW 2007 Australia

Faceted crystals with exposed highly reactive planes have attracted intensive investigations for applications. Herein, we demonstrate a general synthetic method to prepare mesocrystal Co3O4 with predominantly exposed {111} reactive facets by the in situ thermal decomposition from Co（OH）2 nanoplatelets. The mesocrystal feature was identified by field emission scanning electron microscopy, transmission electron microscopy, selected area electron diffraction, and N2 isotherm analyses. When applied as anode material in lithium-ion batteries, mesocrystal Co3O4 nanoplatelets delivered a high specific capacity and an outstanding high rate performance. The superior electrochemical performance should be ascribed to the predominantly exposed {111} active facets and highly accessible surfaces. This synthetic strategy could be extended to prepare other mesocrystal functional nanomaterials.

关键词： msoporous material faceted crystal anode materiallithium ion battery

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