高等学校化学学报

高等学校化学学报

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嵌入诱导型层状Nb3VSe6/碳纳米纤维膜调控多硫化物转化与锂沉积实现高稳定锂硫电池

张莹莹,薛嘉仪,王朝,党宇鑫,张鹏,王高亮,麻天舒,贾琪,吴桐,刘景海   

  1. 内蒙古民族大学化学与材料学院，内蒙古固体化学与电池重点实验室，锂硫电池储能内蒙古自治区工程研究中心
  • 收稿日期:2026-05-27 修回日期:2026-06-26 网络首发:2026-06-30 发布日期:2026-06-30
  • 通讯作者: 刘景海
  • 基金资助:
    国家自然科学基金（编号：22361035，22461030）；内蒙古自然科学基金（编号：2024QN02013）；内蒙古草原英才-青年领军人才计划（编号：KYCYYC24001，KYCYYC25002）；自治区级事业单位引进优秀人才和科研启动绩效项目（编号：RCQD20002）；内蒙古民族大学博士科研基金（编号：KYQD21002、KYQD23005）；内蒙古自治区直属高校基本科研业务费项目（编号：GXKY25Z009）；内蒙古自治区高校创新团队计划（编号：NMGIRT2417）；内蒙古自治区重点实验室创新平台建设项目（编号：KJJH2402, SYS25003）；内蒙古自然科学基金重点联合项目（编号：2025ZDLH004）；内蒙古自治区提质培育学科（化学）；锂硫电池储能内蒙古自治区工程研究中心开放课题项目（MDK2024057）

Embedded Inducible Layered Nb3VSe6/Carbon Nanofiber Membrane Regulates Sulfide Conversion and Lithium Deposition to Achieve High-Stability Lithium-Sulfur Batteries

ZHANG Yiingying*, XUE Jiayi, WANG chao, DANG yuxin, ZHANG Peng, WANG gaoliang, MA Tianshu, JIA qi, WU Tong, LIU Jinghai*   

  1. Inner Mongolia Key Laboratory of Solid State chemistry for Battery; Inner Mongolia Engineering Research Centre of Lithium-Sulfur Battery Energy Storage, College of Chemistry and Materials Science, Inner Mongolia Minzu University
  • Received:2026-05-27 Revised:2026-06-26 Online First:2026-06-30 Published:2026-06-30
  • Contact: 景海 刘

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摘要： 锂硫电池因其高达1675.0 mAh/g的理论比容量和2600.0 Wh/kg的能量密度，被认为是下一代最具应用前景的电化学储能器件之一。然而，锂硫电池中硫及硫化锂的氧化还原反应动力学缓慢、多硫化物穿梭效应以及锂枝晶生长等问题，严重阻碍了锂硫电池的发展及应用。因此，制备了柔性Nb3VSe6/碳纳米纤维复合膜（NVSCNF），并将其作为锂硫电池的电催化膜反应器（NVS@MR）。通过V原子插层策略，对2H-NbSe2进行改性，构筑了一种嵌入诱导型层状催化剂。NVSCNF对多硫化锂具有强化学吸附能力和优异的电催化活性，提升了氧化还原动力学，且NVSCNF的丰富活性位点良好的调控锂沉积行为，抑制枝晶生长。所组装的锂硫电池在0.1C时的放电比容量为1305.0 mAh/g，在5.0C高电流密度下循环800次后容量仍保持在502.3 mAh/g，在0.5 mA/cm2下可稳定循环?超过1000小时?，初始过电位仅?18.3 mV?。

关键词: Nb?VSe6膜反应器, V原子插层, 多硫化物转化, 锂沉积, 锂硫电池

Abstract: Lithium sulfur batteries are considered one of the most promising electrochemical energy storage devices for the next generation due to their theoretical specific capacity of 1675 mAh/g and energy density of 2600 Wh/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. Therefore, a flexible Nb3VSe6/carbon nanofiber composite membrane (NVSCNF) was prepared and used as an electrocatalytic membrane reactor for lithium sulfur batteries (NVS@MR). A layered catalyst with embedded induction was constructed by modifying 2H-NbSe2 through V atom intercalation strategy. NVSCNF has strong chemical adsorption capacity and excellent electrocatalytic activity towards lithium polysulfides, enhancing redox kinetics. The abundant active sites of NVSCNF effectively regulate lithium deposition behavior and inhibit dendrite growth. The discharge specific capacity of the assembled lithium sulfur battery is 1305 mAh/g at 0.1C, and the capacity remains at 502.3 mAh/g after 800 cycles at a high current density of 5.0C. It can be stably cycled for more than 1000 hours at 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

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