MoS2-intercalated carbon hetero-layers bonded on graphene as electrode materials for enhanced sodium/potassium ion storage  

作　　者：Laiying Jing Junwei Sun Chaoyang Sun Di Wu Gang Lian Deliang Cui Qilong Wang Haohai Yu 

机构地区：[1]State Key Lab of Crystal Materials,Shandong University,Jinan 250100,China [2]School of Materials Science and Engineering,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250353,China [3]Key Laboratory for Special Functional Aggregated Materials of Education Ministry,School of Chemistry&Chemical Engineering,Shandong University,Jinan 250100,China

出　　处：《Nano Research》2023年第1期473-480,共8页纳米研究（英文版）

基　　金：The authors are grateful to the National Key Research and Development Project(No.51890863);the National Natural Science Foundation of China(Nos.51872172 and 51972197);Natural Science Foundation of Shandong Province(Nos.ZR2019MEM021 and ZR2020QE067);Young Scholars Program of Shandong University.

摘　　要：MoS2 is considered as an ideal electrode material in the field of energy storage due to high theoretical specific capacity and unique layered structure.However,limited interlayer distance and poor intrinsic electrical conductivity restrict its potential realworld application.Herein,an alternately intercalated structure of MoS2 monolayer and N-doped porous carbon(NC)layer is grown on reduced graphene oxide(rGO)via a chemical intercalated strategy.The expanded interlayer distance of MoS2(0.96 nm),enlarged by the intercalation of N-doped porous carbon layers,can enhance ion diffusion mobility,provide additional reactive sites for ion storage and maintain the stability of electrode structure.In addition,the hierarchical structures between rGO substrate and intercalated N-doped carbon layers construct a three-dimensional(3D)conductive network,which can significantly improve the electrical conductivity and the structural stability.As a result,the rGO-supported MoS2/NC electrode exhibits an ultrahigh reversible capacity and remarkable long cycling stability for sodium-ion batteries(SIBs)and potassium-ion(PIBs).Meanwhile,the as-obtained MoS2/NC@rGO electrode also delivers a superior cycle performance of 250 mAh·g−1 after 160 cycles at 0.5 A·g−1 when employed as an anode for sodium-ion full cells.

关 键 词：MOS2 GRAPHENE expanded interlayer spacing sodium-ion batteries potassium-ion batteries 

分 类 号：TB33[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]