Journal of Inorganic Materials ›› 2017, Vol. 32 ›› Issue (7): 691-698.doi: 10.15541/jim20160493

• Orginal Article • Previous Articles     Next Articles

Hydrothermal Synthesis of FeS2/Reduced Graphene Oxide Nanocomposite with Enhanced Discharge Performance for Thermal Battery

Kun-Kun YANG1,2(), Shao-Hua YANG1,2(), Ping ZHAO1,2(), Yan-Long ZHAO3   

  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. of North Special Energy Group, Xi’an 710025, China
  • Received:2016-08-29 Revised:2016-11-20 Online:2017-07-20 Published:2017-06-23
  • About author:YANG Kun-Kun. E-mail: kkyang69@126.com

Abstract:

FeS2/reduced graphene oxide (RGO) composites were prepared through a facile hydrothermal method using FeCl2, Na2S2O3 and graphene oxide(GO) as the starting materials. X-ray diffractometer (XRD), scanning electron microscope (SEM), laser particle size distribution analyzer, and differential thermal analyzer (DTA) were used to characterize the prepared nanocomposites. The results show that graphene oxide prevents the aggregation of FeS2 particles during the hydrothermal synthesis, and make FeS2 form loose spherical particles. FeS2/RGO exhibits a high specific capacity of 314.9 mAh/g with a cut-off voltage of 1.5 V at constant current density of 100 mA/cm2 and temperature of 450℃ in LiCl-KCl melt, which is 65.6 mAh/g higher than that of FeS2. FeS2/RGO exhibits a high specific capacity of 302.3 mAh/g with a cut-off voltage of 1.5 V at constant current density of 100 mA/cm2 and temperature of 500℃ in LiF-LiCl-LiBr melt, which is 29.8 mAh/g higher than that of FeS2. In contrast with FeS2, the conductivity of the FeS2/RGO cathode material is improved, the resistance of the single cell is relatively lower during discharge process, thus FeS2/RGO cathode has a better battery discharge capacity.

Key words: thermal battery, cathode material, hydrothermal synthesis, FeS2/RGO

CLC Number: 

  • TM911