无机材料学报

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纳米Ni(OH)2的控制结晶法制备

何向明, 李建军, 成宏伟, 姜长印, 万春荣   

  1. 清华大学核能与新能源技术研究院材料化学实验室, 北京 102201
  • 收稿日期:2004-10-10 修回日期:2004-12-27 出版日期:2005-11-20 网络出版日期:2005-11-20

Preparation of Nano-scale Ni(OH)2 Based on Controlled Crystallization

HE Xiang-Ming, LI Jian-Jun, CHENG Hong-Wei, JIANG Chang-Yin, WAN Chun-Rong   

  1. Materials Chemistry Lab, INET, Tsinghua University, Beijing 102201, China
  • Received:2004-10-10 Revised:2004-12-27 Published:2005-11-20 Online:2005-11-20

摘要: 纳米Ni(OH)2可以有效地提升镍氢电池的性能. 本文以NiSO4和NaOH为原料, 聚乙二醇为分散剂, 采用控制结晶法制备了纳米Ni(OH)2的胶体溶液, 控制结晶的pH值和温度分别为11.0
和45℃. 然后用正丁醇进行共沸蒸馏处理. 制备了分散性良好的纳米Ni(OH)2粉体, 粉体颗粒粒径20nm左右, 团聚体系数为1.07. 并用TEM和XRD对粉体进行了表征. 所制备的样品在
1C倍率放电时电容量达到258mAh·g-1.

关键词: 纳米Ni(OH)2, 团聚控制, 控制结晶, 分散性

Abstract: The dispersive nano-scale Ni(OH)2 was synthesized by a improved controlled crystallization process and dehydrated by azeotropic distillation with n-butanol. The pH value and temperature of controlled
crystallization were optimized to be 11.0 and 45℃, respectively. As-prepared nano-scale Ni(OH)2 was dispersive, of 20nm size, and characterized by both TEM and XRD analysis.
It had discharge capacity in excess of 258mAh·g-1.

Key words: nano-scale, nickel hydroxide, controlled crystallization, dispersive

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