Fabrication and lithium storage performance of three-dimensional porous NiO as anode for lithium-ion battery
Fabrication and lithium storage performance of three-dimensional porous NiO as anode for lithium-ion battery
复制标题
锂离子电池负极三维多孔NiO的制备及储锂性能
DOI：
10.1016/j.jpowsour.2010.04.090
复制
发表时间：
2010-11-01
影响因子：
9.2
通讯作者：
Chen, Huanjun
中科院分区：
文献类型：
--
作者：
Wang, Chong;Wang, Dianlong;Chen, Huanjun
采用不同温度下的热处理方法在泡沫镍上制备了三维多孔NiO。用X射线衍射、扫描电镜和透射电镜对多孔NiO的形貌和结构进行了表征。三维多孔NiO阳极的电化学性能进行了评估恒流充放电循环，循环伏安法，和阻抗谱的测量与锂作为反电极和参比电极的电池。结果表明，当在0.05- 3.0V电压范围内以0.2C的速率循环时，多孔NiO提供了520 +/- 20 mAh g（-1）的稳定容量，并且在长达30次循环时没有明显的容量衰减。与NiO箔相比，多孔NiO表现出更高的可逆容量、更好的循环性能以及更高的倍率性能。分析了所观察到的循环伏安图和阻抗谱，并解释了NiO-Ni-0的氧化还原反应与Li 2 O的形成和分解。多孔NiO优异的电化学性能可归因于其大的比表面积，降低了NiO反应界面的电流密度，进而为锂离子电池提供了一种替代阳极。(C)2010 Elsevier B. V.保留所有权利。
Three-dimensional porous NiO is prepared on Ni foam by a thermal treatment method at various temperatures. The morphology and structure of porous NiO are characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The electrochemical properties of three-dimensional porous NiO anode are evaluated by galvanostatic discharge-charge cycling, cyclic voltammery, and impedance spectral measurements on cells with lithium as the counter and reference electrodes. Results show that porous NiO delivers a stable capacity of 520 +/- 20 mAh g(-1) with no noticeable capacity fading up to 30 cycles when cycled in the voltage range 0.05-3.0 V at rate of 0.2 C. The porous NiO exhibits higher reversible capacity, better cycleability, as well as higher rate capability in comparison to NiO foil. The observed cyclic voltammograms and impedance spectra are analyzed and interpret a redox reaction of NiO-Ni-0 with formation and decomposition of Li2O. The excellent electrochemical performance of porous NiO can be attributed to its large surface area, which lowers the current density of NiO reaction interface, and then an alternative anode is provided for lithium-ion batteries. (C) 2010 Elsevier B.V. All rights reserved.