中国造纸学报2025，Vol.40Issue(4)：20-30,11.DOI:10.11981/j.issn.1000-6842.2025.04.20
N,B,F三元共掺杂木质素基碳纤维改性锂硫电池隔膜电化学性能
Lignin-derived N,B,and F Tri-doped Carbon Fibers for Improving Electrochemical Performances of Lithium-Sulfur Battery Separators
摘要
Abstract
In this study,alkali lignin was employed as raw material to synthesize nitrogen,boron,and fluorine ternary-doped carbon nanofi-ber(NBFCNF)via ionic liquid-assisted electrospinning.The NBFCNF was integrated onto commercial polypropylene(PP)separators to con-struct a functional interfacial layer(NBFCNF/PP).The microporous structure,conductive network formation,interfacial chemical proper-ties,and lithium polysulfide reaction kinetics of separators for lithium-sulfur batteries were systematically investigated,using scanning elec-tron microscopy,contact angle measurements,cyclic voltammetry,galvanostatic charge-discharge,and electrochemical impedance spectros-copy.The results showed that under high sulfur loadings(5.0 and 6.5 mg/cm2),lithium-sulfur batteries with NBFCNF/PP separators deliv-ered discharge capacities of 673 and 577 mAh/g,respectively,after 200 charge-discharge cycles.At current density of 0.2 C,the batteries retained a discharge capacity of 963.5 mAh/g after 200 cycles,corresponding to a capacity retention of 73%,significantly outperforming lithi-um-sulfur batteries with PP separators.The effective chemical adsorption of lithium polysulfides was caused by the NBFCNF/PP separator,which suppressed the shuttle effect,accelerates interfacial reaction kinetics,and markedly improved cycling stability and rate capability.关键词
木质素/锂硫电池/碳纳米纤维/静电纺丝/多硫化锂Key words
lignin/lithium-sulfur batteries/carbon nanofibers/electrospinning/lithium polysulfides分类
轻工纺织引用本文复制引用
张换春,李彦岑,孙润仓,胡顺友..N,B,F三元共掺杂木质素基碳纤维改性锂硫电池隔膜电化学性能[J].中国造纸学报,2025,40(4):20-30,11.基金项目
大连工业大学引进人才科研启动经费项目(LJBKY2024031,LJBKY2025018) （LJBKY2024031,LJBKY2025018）
辽宁省博士科研启动基金计划项目(2025-BS-0464) （2025-BS-0464）
中国科协青年人才托举工程项目(2024QNRC0555). （2024QNRC0555）
