Conductive Mesoporous Niobium Nitride Microspheres/Nitrogen-Doped Graphene Hybrid with Efficient Polysulfide Anchoring and Catalytic Conversion for High-Performance Lithium-Sulfur Batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

9 Scopus Citations
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Author(s)

  • Xingxing Li
  • Biao Gao
  • Xian Huang
  • Zhijun Guo
  • Qingwei Li
  • Xuming Zhang
  • Kaifu Huo

Detail(s)

Original languageEnglish
Journal / PublicationACS Applied Materials and Interfaces
Volume11
Issue number3
Online published2 Jan 2019
Publication statusPublished - 23 Jan 2019

Abstract

Lithium-sulfur (Li-S) batteries are promising next-generation energy storage devices because of their high energy density of 2600 Wh kg-1. Efficient immobilization and fast conversion of soluble lithium polysulfide intermediates (LiPSs) are crucial to the electrochemical performance of Li-S batteries. Herein, we report a novel strategy to simultaneously achieve large capacity, high rate capability, and long cycle life by utilizing mesoporous niobium nitride microspheres/N-doped graphene nanosheets (NbN@NG) hybrids as multifunctional host materials for sulfur cathodes. The mesoporous NbN microspheres chemically immobilize LiPSs via Nb-S chemical bonding and catalytically promote conversion of LiPSs into insoluble Li2S resulting in enhanced redox reaction kinetics. Moreover, the highly conductive NbN and N-doped graphene nanosheets provide rapid electron transport and consequently, the S/NbN@NG cathode demonstrates a large capacity of 948 mAh g-1 at 1C (1C = 1650 mA g-1), high rate capability of 739 mAh g-1 at 5C, and excellent cycle stability with a capacity decay of 0.09% per cycle for over 400 cycles. The results described here provide insights into the design of multifunctional host materials for high-performance Li-S batteries.

Research Area(s)

  • chemical absorption, electrocatalytic conversion, lithium-sulfur batteries, niobium nitride, polysulfide trapping

Citation Format(s)

Conductive Mesoporous Niobium Nitride Microspheres/Nitrogen-Doped Graphene Hybrid with Efficient Polysulfide Anchoring and Catalytic Conversion for High-Performance Lithium-Sulfur Batteries. / Li, Xingxing; Gao, Biao; Huang, Xian; Guo, Zhijun; Li, Qingwei; Zhang, Xuming; Chu, Paul K.; Huo, Kaifu.

In: ACS Applied Materials and Interfaces, Vol. 11, No. 3, 23.01.2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review