Boosting bidirectional conversion of polysulfide driven by the built-in electric field of MoS_(2)/MoP Mott–Schottky heterostructures in lithium–sulfur batteries
作者机构：School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China MIIT Key Laboratory of Advanced Structural–Functional Integration Materials&Green Manufacturing TechnologyHarbin Institute of TechnologyHarbin 150001China
出 版 物：《Journal of Advanced Ceramics》 (先进陶瓷（英文）)
年 卷 期：2023年第12卷第10期
页 面：1872-1888页
核心收录：
学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学]
基 金：supported by the National Natural Science Foundation of China(Grant Nos.51772060,51672059,52372041,52302087,51621091) Heilongjiang Touyan Team Program,and the Fundamental Research Funds for the Central Universities(Grant No.HIT.OCEF.2021003)
主 题：MoS_(2)/MoP Mott-Schottky heterostructures synergistic effect bidirectional polysulfide conversion shuttle effect lithium-sulfur(Li-S)batteries
摘 要：Heterostructure engineering for sulfur hosts is an effective way to achieve interfacial synergistic effects on suppressing the“shuttle effectof polysulfides and thus improve electrochemical performance of lithium–sulfur(Li–S)*** selection and design of different components into heterostructures is vital to enhance the synergistic ***,MoS_(2)/MoP Mott–Schottky heterostructure nanoparticles decorated on reduced graphene oxide(MoS_(2)/MoP@rGO)are fabricated and used as sulfur host *** calculation and experiment results reveal that the in-situ introduction of MoP could tune the electronic structure,activate the basal plane of MoS_(2),and achieve the interfacial synergistic effects between adsorption(MoS_(2))and fast conversion(MoP).Such synergistic effects enable MoS_(2)/MoP@rGO to not only remarkably facilitate Li_(2)S deposition during the discharging process but also significantly accelerate the Li_(2)S dissolution during the charging process,demonstrating bidirectional promotion ***,the designed cathode delivers initial capacity of 919.5 mA·h·g^(−1)with capacity of 502.3 mA·h·g^(−1)remaining after 700 cycles at 0.5 *** under higher sulfur loading of 4.31 mg·cm^(−2)and lower electrolyte to sulfur(E/S)ratio of 8.21μL·mg^(−1),the MoS_(2)/MoP@rGO@S cathode could still achieve good capacity and cycle *** work provides a novel and efficient structural design strategy of sulfur hosts for high-performance Li–S energy storage systems.
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