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锂硫电池的高稳定性
Embedded Inducible Layered Nb₃VSe₆/Carbon Nanofiber Membrane Regulating Sulfide Conversion and Lithium Deposition to Achieve High-stability of Lithium-Sulfur Batteries
摘要
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 applica-tion of lithium sulfur batteries.In this study,a flexible Nb ₃VSe₆/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.关键词
Nb₃VSe6膜反应器/V原子插层/多硫化物转化/锂沉积/锂硫电池Key words
Nb₃VSe6 membrane reactor/V-atom intercalation/Polysulfide conversion/Lithium deposition/Lithium-sulfur battery分类
化学化工引用本文复制引用
张莹莹,刘景海,薛嘉仪,王朝,党宇鑫,张鹏,王高亮,麻天舒,贾琪,吴桐..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锂硫电池的高稳定性[J].高等学校化学学报,2026,47(9):112-122,11.基金项目
国家自然科学基金(批准号:22361035,22461030)、内蒙古自然科学基金(批准号:2024QN02013)、内蒙古草原英才-青年领军人才计划(批准号:KYCYYC24001,KYCYYC25002)、内蒙古民族大学博士科研基金(批准号:KYQD21002、KYQD23005)、内蒙古自治区直属高校基本科研业务费项目(批准号:GXKY25Z009)和内蒙古自治区重点实验室创新平台建设项目(批准号:KJJH2402,SYS25003)资助.Supported by the National Natural Science Foundation of China(Nos.22361035,22461030),the Inner Mongolia Natural Science Foundation,China(No.2024QN02013),the Inner Mongolia Grassland Talents-Young Leading Talents Program,China(Nos.KYCYYC24001,KYCYYC25002),the Inner Mongolia Minzu University Doctoral Research Fund,China(Nos.KYQD21002,KYQD23005),the Basic Research Operating Expenses Project for Universities Directly Under the Inner Mongolia Autonomous Region,China(No.GXKY25Z009),and the Innovation Platform Construc-tion Project of Key Laboratories in the Inner Mongolia Autonomous Region,China(Nos.KJJH2402,SYS25003). （批准号:22361035,22461030）
