中华医学超声杂志

应用化学 ›› 2011, Vol. 28 ›› Issue (11): 1323-1330.DOI: 10.3724/SP.J.1095.2011.00694

• 研究论文 • 上一篇    下一篇

镍氢电池正极大电流充放电性能及最佳配方

杨志宇,胡猛,季小丹,雷立旭*   

  1. (东南大学化学化工学院 南京 211189)
  • 收稿日期:2010-11-22 修回日期:2011-01-20 出版日期:2011-11-10 发布日期:2011-11-10
  • 通讯作者: 雷立旭，教授; Tel:025-52090620; Fax:025-52090618; E-mail:lixu.lei@seu.edu.cn; 研究方向：无机能量转换材料、固体废弃物资源化及固体化学
  • 基金资助:
    江苏省“六大人才高峰”行动计划（2007004）资助项目

The Charge and Discharge Properties and the Optimum Formulation of a Positive Electrode of Nickel Metal Hydride Batteries

YANG Zhiyu, HU Meng, JI Xiaodan, LEI Lixu*   

  1. (School of Chemistry and Chemical Engineering,Southeast University,Nanjing 211189)
  • Received:2010-11-22 Revised:2011-01-20 Published:2011-11-10 Online:2011-11-10
  • Contact: Hu Meng

PDF

1247

被引次数

5

摘要：

采用化学共沉淀法制备了镍铝和钴铝2种层状氢氧化物[Ni4Al(OH)10]OH和[Co4Al(OH)10]NO3。 将前者作为电极活性材料，后者及石墨作为正极导电添加剂，通过单纯形重心设计研究了正极中3种物质的最佳配比，使其大电流充放电性能得到有效地提高。 结果表明，电极的性能与电极配方密切相关。 当[Ni4Al(OH)10]OH、[Co4Al(OH)10]NO3和石墨的质量分数分别为64.45%、12.27%和23.28%时，电极在经过800 mA/g 200次充放电后的放电比容量最高，为270.5 mA·h/g (最大值的88.7%)；[Co4Al(OH)10]NO3的加入使电极的放电比容量和循环寿命得到了显著的提高。

关键词: [Ni4Al(OH)10]OH, [Co4Al(OH)10]NO3, 单纯形重心设计, 大电流充放电

Abstract:

Two layered double hydroxides, [Ni4Al(OH)10]OH and [Co4Al(OH)10]NO3, were synthesized by chemical co-precipitation. The former was used as the active material and the latter as well as graphite were used as the conductive additives, respectively. The optimum ratio of the three materials in a positive electrode was estimated through the simplex-centroid design to improve the charge/discharge properties efficiently at a high current density. When the mass fractions of [Ni4Al(OH)10]OH, [Co4Al(OH)10]NO3 and graphite are 64.45%, 12.27% and 23.28%, respectively, the discharge capacity can retain 270.5 mA·h/g(88.7% of the maximum) after 200 cycles a current density of 800 mA/g.

Key words: [Ni4Al(OH)10]OH, [Co4Al(OH)10]NO3, simplex-centroid design, charge and discharge at high current density

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