Rational Design of WO_3 Nanostructures as the Anode Materials for Lithium-Ion Batteries with Enhanced Electrochemical Performance

作     者：Yang Liu Yang Jiao Haiyue Zhou Xiang Yu Fengyu Qu Xiang Wu 

作者机构：Key Laboratory for Photonic and Electronic Bandgap MaterialsMinistry of Education and College of Chemistry and Chemical Engineering Harbin Normal University 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2015年第7卷第1期

页      面：12-16页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the Scientific Research Fund of Heilongjiang Provincial Education Department (12531179) Program for Scientific and Technological Innovation Team Construction in Universities of Heilongjiang (No. 2011TD010) 

主　　题：WO3 nanostructures Anode materials Li-ion batteries 

摘      要：A facile, one-step hydrothermal method was employed to synthesize two kinds of WO3 nanostructures. By using different kinds of sylvine, tungsten trioxide(WO3) with different morphologies of microflowers and nanowires was obtained, respectively. The discharge capacities for microflowers and nanowires are 107 and 146 m Ah g-1 after 180 cycles, and their corresponding capacity retentions after the first cycle are 72 and 85 %, respectively. Even at a high current density of 1,600 m Ah g-1, the discharge capacities of WO3 microflowers and nanowires are as high as 433 and557 m Ah g-1 after 40 cycles, in which the current densities were increased stepwise. It is worth mentioned that the rate capability of the nanowires is superior to that of the microflowers. However, the cycle performance of the microflowers is better than nanowires, revealing that the morphology and structure of the as-synthesized WO3 products can exert great influence on the electrochemical performances.