Porous hierarchical TiO2/MoS2/RGO nanoflowers as anode material for sodium ion batteries with high capacity and stability

被引:35
|
作者
Ma, Jingyun [1 ]
Xing, Mengdi [1 ]
Yin, Longwei [2 ]
Hui, Kwan San [3 ]
Hui, Kwun Nam [4 ]
机构
[1] Qilu Univ Technol, Shandong Acad Sci, Sch Mat Sci & Engn, Jinan 250353, Peoples R China
[2] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Sch Mat Sci & Engn, Jinan 250061, Peoples R China
[3] Univ East Anglia, Engn Fac Sci, Norwich NR4 7TJ, Norfolk, England
[4] Univ Macau, Inst Appl Phys & Mat Engn, Ave Univ, Taipa, Macau, Peoples R China
关键词
Sodium ion batteries; Interconnected network; TiO2/MoS2/RGO; Component matching effect; Cycling stability; HIGH-PERFORMANCE ANODE; ANATASE TIO2; ASSISTED SYNTHESIS; DOPED GRAPHENE; LAYERED MOS2; LITHIUM; LI; COMPOSITES; NANOSHEETS; OXIDE;
D O I
10.1016/j.apsusc.2020.147735
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
To enhance the reversible capacity and cycle stability of MoS2 as anode materials for sodium ion batteries (SIBs), we constructed a hybrid architecture composed of MoS2 and TiO2 nanosheets, linking with reduced graphene oxide (RGO) to another TiO2/MoS2 to form a nanoflower structure. Owing to layered RGO coupled with TiO2/MoS2 hybrid, such a composite offered interconnected conductive channels to short shuttle path of Na+ ions and favorable transport kinetics under charge/discharge cycling. Moreover, this unique structure showed a porous and hierarchical architecture, which not only buffered volume changes but also provided more electrochemical active sites during insertion/deintercalation processes of Na ions. Outstanding electrochemical performances were identified by the component matching effect among TiO2, MoS2 and RGO with a three-dimensional (3D) interconnected network, exhibiting a good reversible capacity of 616 mA h g(-1) after 100 cycles at 0.1 A g(-1), an excellent rate capability of 250 mA h g(-1) even at 5A g(-1) and a long cycling stability of 460 mA h g(-1) with a capacity fluctuation of 0.03% per cycle within 350 cycles at 1 A g(-1).
引用
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页数:9
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