Peng Dasong, Duan Lianwei, Wang Xiaodong, Ren Yanchao
67th Floor, Building B, Fangyuan Building, No. 9 Ping'an Road, Luojiang District Quanzhou City Fujian Province China
RSC Adv. 2021 Jul 8;11(39):24125-24131. doi: 10.1039/d0ra10336e. eCollection 2021 Jul 6.
In this work, based on the electrospinning method, pure CoO, pure MnO, and CoO composite nano-fiber materials doped with different ratios of Mn were prepared. XRD, XPS, BET and SEM tests were used to characterize the composition, structure and morphology of the materials. An electrochemical workstation was used to test the electrochemical performance of the materials. The results showed that the material properties had greatly improved on doping Mn in CoO nano-fibers. The relationship between the amount of Mn doped in the CoO composite nano-fiber material and its electrochemical performance was also tested and is discussed in this report. The results show that when : = 20 : 2, the CoO composite nano-fiber material had a specific surface area of 68 m g. Under the current density of 1 A g, the 20 : 2 sample had the maximum capacitance of 585 F g, which was obviously larger than that of pure CoO nano-fibers (416 F g). After 2000 cycles of charging/discharging, the specific capacitance of the 20 : 2 sample was 85.9%, while that of the pure CoO nano-fiber material was only 76.4%. The mechanism of performance improvement in the composite fibers was analyzed, which demonstrated concrete results.
在这项工作中，基于静电纺丝法制备了纯CoO、纯MnO以及掺杂不同比例Mn的CoO复合纳米纤维材料。采用XRD、XPS、BET和SEM测试对材料的组成、结构和形貌进行表征。使用电化学工作站测试材料的电化学性能。结果表明，在CoO纳米纤维中掺杂Mn后材料性能有了很大改善。本报告还测试并讨论了CoO复合纳米纤维材料中Mn掺杂量与其电化学性能之间的关系。结果表明，当 ： = 20 ：2时，CoO复合纳米纤维材料的比表面积为68 m²/g。在1 A/g的电流密度下，20 ：2的样品具有最大电容585 F/g，明显大于纯CoO纳米纤维（416 F/g）。经过2000次充放电循环后，20 ：2样品的比电容为85.9%，而纯CoO纳米纤维材料仅为76.4%。分析了复合纤维性能改善的机理，得出了具体结果。
