醇水法制备纳米氧化镍电极的结构与电化学性能  

Structure and electrochemical performance of nano-sized NiO electrode prepared by alcohol-water method

作　　者：张校飞 左小华 汪汝武[3] 张峰 Zhang Xiaofei;Zuo Xiaohua;Wang Ruwu;Zhang Feng(College of Mathematics and Physics,Hubei Ploytechnic University,Huangshi,435003,China;College of Chemistry and Chimical Engineering,Hubei Ploytechnic University,Huangshi,435003,China;College of Science,Wuhan University of Science and Technology,Wuhan 430065,China)

机构地区：[1]湖北理工学院数理学院,湖北黄石435003 [2]湖北理工学院化学与化工学院,湖北黄石435003 [3]武汉科技大学理学院,湖北武汉430065

出　　处：《武汉科技大学学报》2019年第6期431-436,共6页Journal of Wuhan University of Science and Technology

基　　金：国家自然科学基金资助项目(51372077);国家留学基金委资助项目(201808420381);湖北理工学院引进人才资助项目(12xjz02R)

摘　　要：采用醇水法制备了纳米氧化镍粉体材料并分析了其粉体形成过程,重点研究了热处理温度对氧化镍粉体的相组成、形态以及氧化镍电极电化学性能的影响。结果表明,氧化镍粉体由前驱体Ni2(OH)2CO3·xH2O在270℃附近分解产生;热处理温度对合成粉体的结晶度和比表面积具有显著影响,而粉体的结晶度和比表面积又是影响氧化镍电极电化学性能的重要因素,其中,粉体结晶度的作用占主导地位。当氧化镍粉体热处理温度为250℃时,所制氧化镍电极具有优异的电化学性能,在测试电流密度为5mA/cm2的条件下,其比电容达到1180F/g。Nano-particle NiO powders were successfully synthesized by alcohol-water method,and the synthesis process was discussed.The investigation was focused on the effect of calcining temperature on the phase composition and morphology of NiO powders as well as electrochemical performance of NiO electrodes.The results show that NiO powders derive from the decomposition of the precursor Ni2(OH)2 CO3·xH2O,occurring at around 270℃.The calcining temperature has a significant effect on crystallization and specific area of NiO powders which affect the electrochemical properties of the corresponding electrode.Furthermore,crystallization effect is demonstrated to be predominant.NiO electrode derived from the powders calcined at 250℃exhibits a fairly high specific capacitance of 1180 F/g at a current density of 5 mA/cm2.

关 键 词：纳米氧化镍 氧化镍电极 醇水法 电化学性能 比电容 结晶度 

分 类 号：TQ15[化学工程—电化学工业]