高等学校化学学报 ›› 2016, Vol. 37 ›› Issue (8): 1491-1498.doi: 10.7503/cjcu20160168

• 物理化学 • 上一篇    下一篇

NixCo1-xS2的水热法制备及热电池放电性能

杨坤坤1,2, 赵平1,2, 杨少华1,2(), 赵彦龙3   

  1. 1. 沈阳理工大学环境与化学工程学院, 沈阳 110159
    2. 辽宁省特种储备电源工程技术研究中心, 沈阳 110159
    3. 北方特种能源集团西安庆华公司, 西安 710025
  • 收稿日期:2016-03-23 出版日期:2016-07-19 发布日期:2016-07-19
  • 作者简介:

    联系人简介: 杨少华, 男, 博士, 教授, 主要从事新型化学电源研究. E-mail: 1276994969@qq.com

Hydrothermal Synthesis of NixCo1-xS2 and Its Discharge Performance in Thermal Batteries

YANG Kunkun1,2, ZHAO Ping1,2, YANG Shaohua1,2,*(), ZHAO Yanlong3   

  1. 1. College of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China
    2. Special Reserve Battery Engineering and Technology Research Center of Liaoning Province, Shenyang 110159, China
    3. Xi’an Qinghua Co., Ltd., North Special Energy Group, Xi’an 710025, China
  • Received:2016-03-23 Online:2016-07-19 Published:2016-07-19
  • Contact: YANG Shaohua E-mail:1276994969@qq.com

摘要:

以氯化镍、 硫酸钴、 硫代硫酸钠为反应物, 通过水热法合成系列NixCo1-xS2(x=0, 0.1, 0.3, 0.5, 0.7, 0.9, 1.0)粉体材料; 采用X射线衍射光谱仪(XRD)、 扫描电子显微镜(SEM)、 激光粒度分布仪和差热分析仪(DTA)等对材料进行表征; 采用粉末压片工艺将材料与锂硅合金和LiCl-KCl(MgO)熔盐电解质装配成单体电池, 考察了NixCo1-xS2正极材料中镍、 钴的含量对其放电性能的影响. 结果表明, 当x=0.3时, NixCo1-xS2正极材料在100 mA/cm2恒流放电时, 单体电池放电电压可以达到1.899 V, 截止电压为1.5 V时比容量为276.5 mA·h/g, 放电过程中单体电池内阻较低, 放电性能最好.

关键词: 热电池, 正极材料, 水热合成, NixCo1-xS2

Abstract:

NixCo1-xS2(x=0, 0.1, 0.3, 0.5, 0.7, 0.9, 1.0) powders were prepared by hydrothermal method using NiCl2, CoSO4 and Na2S2O3 and characterized with X-ray diffractometer(XRD), scanning electron microscope, laser particle size distribution analyzer and differential thermal analyser(DTA). A single cell was prepared with a NixCo1-xS2 cathode, a LiSi anode and a LiCl-KCl(MgO) molten salt electrolyte by pressed-power process. The effects of Ni and Co contents in NixCo1-xS2 cathode materials on the discharge performance of thermal battery were investigated. The results suggest that the single cell cathode material with Ni0.3Co0.7S2 cathod has the best performance and the resistance is relatively low. The cell voltage can reach 1.899 V, and the specific capacity can reach 276.5 mA·h/g with a cut-off voltage of 1.5 V at a constant current density of 100 mA/cm2 and a temperature of 450 ℃.

Key words: Thermal battery, Cathode material, Hydrothermal synthesis, NixCo1-xS2

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