Synergistic adsorption and catalytic effects of Ti_(3)C_(2)T_(x)/CoO/MoO_(3) composite on lithium polysulfides for high-performance lithium–sulfur batteries

作     者：Bin Fan Weikun Chen Kaining Li Qingya Wei Qian He Wei Liu Bigui Zhou Jun Yuan Yingping Zou 

作者机构：College of Chemistry and Chemical EngineeringCentral South UniversityChangshaChina College of Resources and Environmental ScienceSouth-Central University for NationalitiesWuhanChina Institute of Carbon Neutrality and New EnergySchool of Electronics and InformationHangzhou Dianzi UniversityHangzhouChina Institute for Advanced StudyCentral South UniversityChangshaChina 

出 版 物：《Interdisciplinary Materials》 (交叉学科材料（英文）)

年 卷 期：2024年第3卷第5期

页      面：726-737页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：Institute of Advanced Study of Central South University High Performance Computing Center of Central South University 

主　　题：lithium-sulfur batteries polysulfides reaction kinetics separator synergistic catalysis 

摘      要：The shuttle effect of lithium polysulfides(LiPSs)and their sluggish kinetic processes lead to rapid capacity fading and poor cycling stability in lithium-sulfur(Li-S)batteries,limiting their commercial *** study proposes a functionalized separator with adsorption and synergistic catalysis ability for Li-S *** modified separator comprises Ti_(3)C_(2)T_(x) sheets,CoO,and MoO_(3).Experimental and theoretical calculations demonstrate that Ti_(3)C_(2)T_(x)/CoO/MoO_(3) composite not only effectively inhibits the shuttle effect of LiPSs,ensuring efficient utilization of active materials,but also enhances reversibility and reaction kinetics among *** full exposure of active sites in the Ti_(3)C_(2)T_(x)/CoO/MoO_(3) composite and the synergistic action of different catalysts enable efficient capture and conversion of LiPSs molecules at the material ***,the lithium-sulfur batteries with Ti_(3)C_(2)T_(x)/CoO/MoO_(3)@PP separator exhibited only a 0.042%capacity decay per cycle at 0.5 C(800 cycles).Moreover,a high areal capacity of 6.85 mAh cm-2 was achieved at high sulfur loading(7.9 mg cm-2)and low electrolyte-to-sulfur ratio(10μL mg-1).