文章摘要
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
投稿时间:2019-07-03  
DOI:
中文关键词: 纳米氧化镍  氧化镍电极  醇水法  电化学性能  比电容  结晶度
英文关键词: nano-sized NiO  NiO electrode  alcohol-water method  electrochemical performance  specific capacitance  crystallinity
基金项目: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).
作者单位E-mail
张校飞 湖北理工学院数理学院,湖北 黄石,435003 zhangxiaofei@whut.edu.cn 
左小华 湖北理工学院化学与化工学院,湖北 黄石,435003  
汪汝武 武汉科技大学理学院,湖北 武汉,430065  
张峰 湖北理工学院数理学院,湖北 黄石,435003  
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中文摘要:
      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5 mA/cm2的条件下,其比电容达到1180 F/g。
英文摘要:
      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)2CO3·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.
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