Universal design of three-dimensional porous graphene-iron based promotors for kinetically rationalized lithium-sulfur chemistry  

作　　者：Hua Gao Yunfeng Zhang Menglei Wang Ruoxuan Yang Shuai Feng Xuan Cao Yaping Zhang Zhongyuan Lu Yingze Song 

机构地区：[1]State Key Laboratory of Environment-Friendly Energy Materials,School of Materials and Chemistry,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China [2]School of Material Science and Engineering,Henan University of Technology,Zhengzhou 450001,Henan,China [3]College of Chemistry and Chemical Engineering,Taishan University,Tai’an 271021,Shandong,China

出　　处：《Journal of Energy Chemistry》2025年第1期192-200,共9页能源化学(英文版)

基　　金：Key Laboratory of Environment-friendly Energy Materials(SWUST,18ZD320304 and 22fksy23);Doctoral Fund of Henan University of Technology(31401577);Natural Science Foundation of Shandong Province(ZR2023MB053);Technological Innovation Project of Tai’an City(2022GX064)。

摘　　要：Lithium-sulfur(Li-S)batteries are widely deemed to be one of the most potential candidates for future secondary batteries because of their remarkable energy density.Nevertheless,notorious polysulfide shuttling and retarded sulfur reaction kinetics pose significant obstacles to the further application of Li-S batteries.While rationally designed highly active electrocatalysts can facilitate polysulfide conversion,the universal and scalable synthesis strategies need to be developed.Herein,a universal synthetic strategy to construct a series of three-dimensional(3D)porous graphene-iron(3DGr-Fe)based electrocatalysts involving 3DGr-FeP,3DGr-Fe_(3)C,and 3DGr-Fe_(3)Se_(4)is exploited for manipulating the Li-S redox reactions.It has been observed that the implementation of a 3D porous Gr architecture leads to the well-designed conductive networks,while the uniformly dispersed iron nanoparticles introduce an abundance of active sites,fostering the lithium polysulfide conversion,thereby bolstering the overall electrochemical performance.The Li-S battery with the 3DGr-Fe based electrocatalyst exhibits remarkable capacity retention of 94.8%upon 100 times at 0.2 C.Moreover,the soft-packaged Li-S pouch cell based on such a 3DGr-Fe electrocatalyst delivers superior capacity of 1060.71 mA h g^(-1)and guarantees for the continuous 30 min work of fan toy.This investigation gives comprehensive insights into the design,synthesis,and mechanism of 3DGr-Fe based electrocatalysts with high activity toward efficient and durable Li-S batteries.

关 键 词：Lithium-sulfur battery Universal synthesis 3D graphene-iron based promotor ELECTROCATALYSIS 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ426[化学工程]