Abstract
In this work, hollow structured V2O5 microspheres were fabricated from solid vanadium precursor microspheres which were prepared by microwave-assisted, solvothermal approach. In the annealing process, the spherical precursor microspheres can be converted into hollow microspheres, serving as a sacrificial template. The synthesis approach is quite different from the previously reported approaches for the preparation of hollow structured V2O5 microspheres. As cathode materials for lithium ion batteries, the hollow-structured V2O5 microspheres exhibit high capacity and good rate capability. The electrodes deliver specific discharge capacities of 132 and 113 mA h g-1 at the current densities of 1 C and 8 C, respectively.
摘要
本文报道了一种制备V2O5中空微球的新方法. 首先采用微波、 溶剂热法制备了实心结构的钒前躯体, 再在空气中烧结, 实现其向空心结构V2O5微球的结构转变. 在此过程中, 前躯体微球起到了牺牲模板的作用. 该制备方式与之前报道的V2O5中空微球的方法有较大不同. 作为锂离子电池正极材料, 该V2O5中空微球的方法有较大不同. 作为锂离子电池正极材料, 该V2O5微球展现了较高的容量和优异的倍率性能. 该材料在电流密度大小为1 C和8 C下的初始放电比容量分别为132和113 mA h g−1.
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Lu Zeng received her bachelor degree from Hunan University of Technology in 2013. She is currently a graduate student at the School of Materials Science and Engineering, Xiang Tan University. She worked in Prof. Anqiang Pan’s group in 2015. Her current research focuses on hollow-structured materials for electrochemical energy storage application.
Anqiang Pan received his BSc (2005) and PhD (2011) degrees in materials physics and chemistry from Central South University. He worked at the University of Washington, Pacific Northwest National Laboratory and Nanyang Technological University and joined Central South University as a Sheng-Hua Professor in 2013. His current interests are on lithium ion batteries, and supercapacitors.
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Zeng, L., Pan, A., Liang, S. et al. Novel synthesis of V2O5 hollow microspheres for lithium ion batteries. Sci. China Mater. 59, 567–573 (2016). https://doi.org/10.1007/s40843-016-5046-1
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DOI: https://doi.org/10.1007/s40843-016-5046-1