Liu Huan, Wang Xinlu, Xu Hang, Wang Jinxian, Ma Qianli, Yu Wensheng, Yang Ying, Dong Xiangting, Liu Guixia, Zhao Yan
Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Department of Chemistry & Environmental Engineering, Changchun University of Science and Technology Changchun Jilin 130022 PR China
RSC Adv. 2018 Nov 26;8(69):39377-39383. doi: 10.1039/c8ra08066f. eCollection 2018 Nov 23.
Nanostructured ZnCoO anode materials for lithium-ion batteries (LIBs) have been successfully prepared by a two-step process, combining facile and concise electrospinning and simple post-treatment techniques. Three different structured ZnCoO anodes (nanoparticles, nanotubes and nanowires) can be prepared by simply adjusting the ratio of metallic salt and PVP in the precursor solutions. Charge-discharge tests and cyclic voltammetry (CV) have been conducted to evaluate the lithium storage performances of ZnCoO anodes, particularly for ZnCoO nanotubes obtained from a weight ratio 2 : 4 of metallic salt and PVP polymer in the precursor solution. Remarkably, ZnCoO nanotubes exhibit high specific capacity, good rate property, and long cycling stability. Reversible capacity is still maintained at 1180.8 mA h g after 275 cycles at a current density of 200 mA g. In case of rate capability, even after cycling at the 2000 mA g current density, the capacity could recover to 684 mA h g. The brilliant electrochemical properties of the ZnCoO anodes make them promising anodes for LIBs and other energy storage applications.
通过两步法成功制备了用于锂离子电池（LIBs）的纳米结构ZnCoO负极材料，该方法结合了简便且简洁的静电纺丝和简单的后处理技术。通过简单调整前驱体溶液中金属盐和PVP的比例，可以制备出三种不同结构的ZnCoO负极（纳米颗粒、纳米管和纳米线）。进行了充放电测试和循环伏安法（CV）以评估ZnCoO负极的锂存储性能，特别是对于从前驱体溶液中金属盐与PVP聚合物重量比为2∶4获得的ZnCoO纳米管。值得注意的是，ZnCoO纳米管表现出高比容量、良好的倍率性能和长循环稳定性。在200 mA g的电流密度下循环275次后，可逆容量仍保持在1180.8 mA h g。在倍率性能方面，即使在2000 mA g的电流密度下循环后，容量仍可恢复到684 mA h g。ZnCoO负极出色的电化学性能使其成为用于LIBs和其他储能应用的有前景的负极材料。
