Iron atom-nanoparticles for interactional enhancing the electrocatalytic reaction activity in Li-S batteries

作     者：Gamal H.Al-Shawesh Jiawen Zhu Wei Zhang Shuai Xie Junjie Xu Guolei Cai Amar Y.Al-Ansi Yunhong Wei Song Jin Hengxing Ji Gamal H.Al-Shawesh;Jiawen Zhu;Wei Zhang;Shuai Xie;Junjie Xu;Guolei Cai;Amar Y.Al-Ansi;Yunhong Wei;Song Jin;Hengxing Ji

作者机构：Hefei National Laboratory for Physical Sciences at the MicroscaleCAS Key Laboratory of Materials for Energy ConversionDepartment of Applied ChemistryUniversity of Science and Technology of ChinaHefei 230026China Department of ChemistryFaculty of EducationThamar UniversityDhamarYemen School of Chemistry and Chemical EngineeringHefei University of TechnologyHefei 230009China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2023年第34卷第11期

页      面：311-316页

核心收录：

学科分类：0808[工学-电气工程] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the Natural Science Foundation of China(Nos.22125902,U2032202,21975243 and 21825302) the National Program for Support of Topnotch Young Professionals,the Fundamental Research Funds for the Central Universities(No.WK2030020032) the DNL cooperation Fund,CAS(No.DNL202020) the Anhui Science Fund for Distinguished Young Scholars(No.2208085J15) 

主　　题：N-doped carbon nanotubes Iron atoms Iron nanoparticles Electrocatalyst Li-S batteries 

摘      要：The undesirable shuttle effect and sluggish redox kinetics of polysulfides seriously result in low sulfur utilization and poor capacity ***,an integrated strategy is proposed by rational designing multifunctional architecture to manipulate the redox kinetics of polysulfides,specifically,by employing iron atoms(Fe-As)and iron-species nanoparticles(Fe-NPs)co-embedded nitrogen-doped carbon nanotube(Fe-NCNT)as catalyst and host for *** synergistic cooperation of Fe-As and Fe-NPs provides efficient active sites to facilitate the diffusion,strengthen the affinities,and promote the conversion reactions for ***,the NCNT not only offers practical Li+transport pathways but also immobilize the polysulfides *** from these merits,the Fe-NCNT/S electrodes exhibit high initial specific capacity of 1502.6 mAh/g at 0.1 C,outstanding rate performance(830 mAh/g at 2 C),and good cycling performance(597.8 mAh/g after 500 cycles with an ultralow capacity fading rate of 0.069%per cycle).This work features the distinct interaction of iron atom-nanoparticles on facilitating immobilization-diffusion-transformation process of polysulfides,and it also expected to pave the way for the application in practical Li-S batteries.