Preparation and electrochemical characterization of ultrathin WO3-x/C nanosheets as anode materials in lithium ion batteries
Preparation and electrochemical characterization of ultrathin WO3-x/C nanosheets as anode materials in lithium ion batteries作者机构：College of Chemistry and Pharmaceutical Engineering Nanyang Normal University Nanyang 473061 China Department of Chemistry Tsinghua University Beijing 100084 China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2017年第10卷第6期
页 面：1903-1911页
核心收录：
学科分类：0808[工学-电气工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学]
基 金：supported by the China Ministry of Science and Technology 国家自然科学基金 the Program for Innovative Talent in University of Henan Province
主 题：WO3-x/C one-pot process,O-vacancies,lithium-ion batteries,anodes
摘 要：Ultrathin two-dimensional （2D） nanomaterials offer unique advantages compared to their counterparts in other dimensionalities. O-vacancies in such materials allow rapid electron diffusion. Carbon doping often improves the electric conductivity. Considering these merits, the WO3-x/C ultrathin 2D nanomaterial is expected to exhibit excellent electrochemical performance in Li-ion batteries. Here, ultrathin WO3-xC nanosheets were prepared via an acid-assisted one-pot process. The as-prepared WO3-x/C ultrathin nanosheets showed good electrochemical performance, with an initial discharge capacity of 1,866 mA·h·g^-1 at a current density of 200 mA·g^-1 After 100 cycles, the discharge and charge capacities were 662 and 661 mA·h·g^-1, respectively. The reversible capacity of the WO3-x/C ultrathin nanosheets exceeded those of WO3 and WOg-x nanosheets. The electrochemical testing results demonstrated that WO3-x/C ultrathin nanosheets are promising alternative anode materials for Li-ion batteries.
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