新型炭材料（中英文）2025，Vol.40Issue(1)：167-177,11.DOI:10.1016/S1872-5805(24)60942-X
炭纤维担载三元金属硫化物实现高性能低温锂硫电池
The use of a ternary metal sulfide loading on carbon fibers as the sulfur host for high performance low-temperature lithium sulfur batteries
摘要
Abstract
The use of lithium-sulfur(Li-S)batteries is limited by sulfur redox reactions involving multi-phase transformations,especially at low-temperatures.To address this issue,we report a material(FCNS@NCFs)consisting of nitrogen-doped carbon fibers loaded with a ternary metal sulf-ide((Fe,Co,Ni)9S8)for use as the sulfur host in Li-S batteries.This materi-al was prepared using transfer blot filter paper as the carbon precursor,thiourea as the source of nitrogen and sulfur,and FeCl3·6H2O,CoCl2·6H2O and NiCl2·6H2O as the metal ion sources.It was synthesized by an impreg-nation method followed by calcination.The nitrogen doping significantly in-creased the conductivity of the host,and the metal sulfides have excellent catalytic activities.Theoretical calculations,and adsorption and deposition experiments show that active sites on the surface of FCNS@NCFs selectively adsorb polysulfides,facilitate rapid adsorption and conversion,prevent cathode passivation and inhib-it the polysulfide shuttling.The FCNS@NCFs used as the sulfur host has excellent electrochemical properties.Its initial dis-charge capacity is 1639.0 mAh g-1 at 0.2 C and room temperature,and it remains a capacity of 1255.1 mAh g-1 after 100 cycles.At-20～C,it has an initial discharge capacity of 1578.5 mAh g at 0.2 C,with a capacity of 867.5 mAh g-1 after 100 cycles.Its excellent performance at both ambient and low temperatures suggests a new way to produce high-performance low-temper-ature Li-S batteries.关键词
锂硫电池/低温/过渡金属硫化物/硫转化动力学Key words
Lithium sulfur batteries/Low temperature/Transition metal sulfides/Sulfur conversion kinetics分类
化学化工引用本文复制引用
何昕,左怀洋,肖茹,屈卓研,孙振华,王宝,李峰..炭纤维担载三元金属硫化物实现高性能低温锂硫电池[J].新型炭材料（中英文）,2025,40(1):167-177,11.基金项目
This work was partially supported by National Natural Science Foundation of China(52172250),and Institute of Process Engineering(IPE)Project for Frontier Basic Research(QYJC-2023-06). （52172250）
