Vertically grown MoS_(2)nanosheets on graphene with defect-rich structure for efficient sodium storage  

作　　者：Ying Wang Jia-Peng He Han-Qing Pan Qing-Peng Wang Lei Zhang Yong-Chang Liu Qing-Hong Wang 

机构地区：[1]School of Chemistry&Materials Science,Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials,Jiangsu Normal University,Xuzhou,221116,China [2]Institute of Biopharmaceutical Research,Liaocheng University,Liaocheng,252059,China [3]Beijing Advanced Innovation Center for Materials Genome Engineering,Institute for Advanced Materials and Technology,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing,100083,China [4]Centre for Catalysis and Clean Energy,Gold Coast Campus,Griffith University,Gold Coast,QLD,4222,Australia

出　　处：《Rare Metals》2024年第3期1062-1071,共10页稀有金属（英文版）

基　　金：financially supported by the Natural Science Foundation of Jiangsu Province(No.BK20211352);the Nature Science Fundation of Jiangsu Higher Education Institutions of China(No.22KJA430005)。

摘　　要：The synthesis of a perpendicular growth structure of MoS_(2)nanosheets on graphene for efficient sodium storage is challenging yet ideal due to the benefits of open ion diffusion channels and high electronic conductivity.In this study,we have successfully fabricated a novel structure of vertical MoS_(2)nanosheets on graphene,with ZnS nanoparticles serving as bonding points(MoS_(2)/ZnS/G),through a facile hydrothermal method.During the synthesis process,Zn^(2+)not only acts as a landing site for the vertical growth of MoS_(2)nanosheets but also triggers the formation of a defect-rich structure in the final samples.This unique architecture of MoS_(2)/ZnS/G effectively combines the advantages of a vertically aligned geometry and a defectrich structure for energy storage.The resulting structure displays shortened transport paths for electrons/ions,enhanced conductivity,improved structural integrity,and an increased number of active sites for promising electrochemical performance.As expected,when used as anode for sodium-ion batteries,the as-synthesize d MoS_(2)/ZnS/G exhibits excellent rate capability(high capacity of 298 mAh·g^(-1)at 5 A·g^(-1))and good cycling stability(a capacity decay of 0.056%per cycle after 500 cycles at 1 A·g^(-1)).According to the kinetic investigations,the electrochemical process of the MoS_(2)/ZnS/G sample is primarily governe d by a pseudocapacitive behavior,which enhances the charge/discharge kinetics and allows the MoS_(2)/ZnS/G structure to remain intact during cycling.

关 键 词：MoS_(2) Perpendicular growth GRAPHENE Sodium storage Electrochemical performance 

分 类 号：TM912[电气工程—电力电子与电力传动] TB383.1[一般工业技术—材料科学与工程]