Journal of Inorganic Materials ›› 2019, Vol. 34 ›› Issue (5): 502-508.DOI: 10.15541/jim20180338

Special Issue: 离子电池材料

Previous Articles     Next Articles

Controllable Preparation of Co-NC Nanoporous Carbon Derived from ZIF-67 for Advanced Lithium-sulfur Batteries

Shi-Qiang LUO,Chun-Man ZHENG(),Wei-Wei SUN,Wei XIE,Jian-Huang KE,Shuang-Ke LIU,Xiao-Bin HONG,Yu-Jie LI,Jing XU   

  1. Department of Material Science and Engineering, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • Received:2018-07-23 Revised:2018-11-26 Published:2019-05-20 Online:2019-05-14
  • Contact:
  • Supported by:
    National Natural Science Foundation of China 51702362(51702362);China Postdoctoral Science Foundation Funded Project(2018M33664);National Postdoctoral Program for Innovative Talents(BX201700103)

Abstract:

This work reported a facile strategy for preparing S/Co-NC composite sulfur cathode materials with different Co loadings derived from ZIF-67, which were applied as cathode materials for Li-S batteries. SEM and TEM were used to observe the morphology and pore structure of Co-NC composite. XRD analysis was employed to investigate the crystalline state of cobalt embedded in porous carbon materials. N2 adsorption-desorption techniques was used to characterize the BET surface area and pore volume of Co-NC samples. Experimental results showed that the Co-NC with Co content of 15.93wt% exhibited the superior electrochemical performance. The cathode equipped with optimized composite showed a high capacity retention rate of 94.84% between 50 th to 200 th cycles at 0.2C current density, and even at high current density (5.0C), a high discharge capacity of 718.8 mAh?g -1 could still be obtained.

Key words: metal-organic frameworks (MOFs), N-doped porous carbon, Li-S battery, cycle stability

CLC Number: