Journal of Inorganic Materials ›› 2016, Vol. 31 ›› Issue (9): 992-996.doi: 10.15541/jim20160085

• Orginal Article • Previous Articles     Next Articles

In-situ Synthesis and Discharge Performance of Ni-NiCl2 Composite as Cathode Materials for Thermal Batteries

Ying CHU1(), Yun-Wei LI2, Qi-Bing WU2, Jing HU1, Qian-Qiu TIAN2, He-Long HU1, Yong-Ping ZHU1()   

  1. 1. Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
    2. Meiling Power Co., Ltd, Zunyi 563003, China
  • Received:2016-02-02 Revised:2016-04-29 Online:2016-09-20 Published:2016-08-29
  • About author:CHU Ying. E-mail: ychu@ipe.ac.cn
  • Supported by:
    National Natural Science Youth Foundation of China (51204155)

Abstract:

As a high potential compound, NiCl2 is an ideal anode material for high powder thermal battery, but its small specific surface area and poor conductivity hinder the application in thermal battery. In present study, The Ni-NiCl2 composite with high specific surface area and conductivity was prepared by sublimation and in-situ synthesis, as cathode materials for thermal batteries. The precursor material NiCl2·6H2O was dried to dehydrate and sublimated at 850~900℃ in Ar atmosphere successively. And then the yellow sublimed powder was reduced at 300~500℃ in Ar + H2 atmosphere for 1 h. Finally, the Ni and NiCl2 composite powders were formed. Thermoanalysis, crystal structure, in-situ synthesis process and electrochemical performance of the powders were analyzed. The results show that NiCl2 crystal grows along the direction perpendicular to c axis and formed a layered structure of 200-300 µm in the sublimation process. The resistivity of Ni-NiCl2 composite is reduced with the increase of elemental Ni content. The discharge curve of LiSi︱LiCl-LiBr-LiF︱NiCl2 thermal batteries with Ni-NiCl2 (5wt% elemental Ni) as anode material at 1000 mA/cm2 is more stable and has a shorter activation time, as compared to the discharge curve with pure NiCl2 as anode material.

Key words: thermal batteries, cathode material, Ni-NiCl2 Composite: in-situ synthesis, discharge performance

CLC Number: 

  • TB333