化工学报 ›› 2010, Vol. 61 ›› Issue (10): 2703-2707.

• 能源和环境工程 • 上一篇    下一篇

层间阴离子对铝取代氢氧化镍电化学性能的影响

李延伟;李月晓;姚金环;姜吉琼;张正刚;刘长久   

  1. 桂林理工大学化学与生物工程学院;桂林理工大学有色金属及材料加工新技术教育部重点实验室
  • 出版日期:2010-10-05 发布日期:2010-10-05

Influence of intercalated anions on electrochemical performance of Al substituted nickel hydroxide

LI Yanwei; LI Yuexiao; YAO Jinhuan;IANG Jiqiong;ZHANG Zhenggang;LIU Changjiu   

  • Online:2010-10-05 Published:2010-10-05

摘要:

采用化学共沉淀法制备出层间分别含有SO-4和NO-3的铝取代氢氧化镍样品。利用X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)和扫描电子显微镜(SEM)对样品的微观结构和表面形貌进行了分析。采用循环伏安(CV)、交流阻抗(EIS)和充放电测试表征了样品的电化学性能。结果表明,层间含有NO-3的铝取代氢氧化镍比层间含有SO-4的铝取代氢氧化镍具有更好的电化学反应可逆性、更高的质子传递系数和放电比容量。

关键词:

氢氧化镍, 阴离子, 微观结构, 电化学性能

Abstract:

Al substituted nickel hydroxide with interlayer SO-4 or NO-3 were synthesized by chemical coprecipitation method and their microstructure and morphology were characterized by X-ray diffraction (XRD),Fourier transform infrared (FT-IR)and scanning electron microscopy (SEM).The electrochemical performance of these samples was measured by cyclic voltammetry (CV), electrochemical impedence spectroscopy (EIS)and charge-discharge test.The results showed that better reaction reversibility, higher proton diffuse coefficient and discharge capacity were obtained for the nickel hydroxide with interlayer NO-3 than for that with interlayer SO-4.

Key words:

氢氧化镍, 阴离子, 微观结构, 电化学性能