Chem. J. Chinese Universities ›› 2026, Vol. 47 ›› Issue (9): 20260220.doi: 10.7503/cjcu20260220

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Embedded Inducible Layered Nb₃VSe₆/Carbon Nanofiber Membrane Regulating Sulfide Conversion and Lithium Deposition to Achieve High-stability of Lithium-Sulfur Batteries

ZHANG Yingying(), XUE Jiayi, WANG Chao, DANG Yuxin, ZHANG Peng, WANG Gaoliang, MA Tianshu, JIA Qi, WU Tong, LIU Jinghai()   

  1. College of Chemistry and Materials Science,Inner Mongolia Key Laboratory of Solid State Chemistry and Battery,Inner Mongolia Engineering Research Centre of Lithium?Sulfur Battery Energy Storage,Inner Mongolia Minzu University,Tongliao 028000,China
  • Received:2026-05-07 Online:2026-09-10 Published:2026-06-30
  • Contact: ZHANG Yingying, LIU Jinghai E-mail:zhangyingying@imun.edu.cn;jhliu2015@imun.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22361035, 22461030);the Inner Mongolia Natural Science Foundation, China(2024QN02013);the Inner Mongolia Grassland Talents-Young Leading Talents Program, China(KYCYYC24001, KYCYYC25002);the Inner Mongolia Minzu University Doctoral Research Fund, China(KYQD21002、 KYQD23005);the Basic Research Operating Expenses Project for Universities Directly Under the Inner Mongolia Autonomous Region, China(GXKY25Z009);the Innovation Platform Construction Project of Key Laboratories in the Inner Mongolia Autonomous Region, China(KJJH2402, SYS25003)

Abstract:

Lithium sulfur batteries are considered as one of the most promising electrochemical energy storage devices for the next generation due to their theoretical specific capacity of 1675 mA·h/g and energy density of 2600 W·h/kg. However, the slow kinetics of the oxidation-reduction reaction of sulfur and lithium sulfide in lithium sulfur batteries, the shuttle effect of polysulfides, and the growth of lithium dendrites seriously hinder the development and application of lithium sulfur batteries. In this study, a flexible Nb₃VSe₆/carbon nanofiber composite membrane(NVSCNF) was prepared and used as an electrocatalytic membrane reactor(NVS@MR) for lithium-sulfur batteries. A layered catalyst with embedded induction was constructed by modifying 2H-NbSe2 through V atom intercalation strategy. NVSCNF exhibits strong chemical adsorption capacity and excellent electrocatalytic activity toward lithium polysulfides, enhancing redox kinetics; furthermore, the abundant active sites on NVSCNF effectively regulate lithium deposition behavior and suppress dendrite growth. The assembled lithium-sulfur battery exhibited a discharge specific capacity of 1305.0 mA·h/g at a rate of 0.1 C. After 800 cycles at a rate of 5.0 C, the capacity remained at 502.3 mA·h/g. It could cycle stably for over 1000 h at a current density of 0.5 mA/cm², with an initial overpotential of only 18.3 mV.

Key words: Nb?VSe6 membrane reactor, V-atom intercalation, Polysulfide conversion, Lithium deposition, Lithium-sulfur battery

CLC Number: 

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