Sodium storage performance and mechanism of rGO-wrapped nanorod vanadium sulfide as an anode material for sodium ion batteries

被引：21

作者：

Zhu, Liya ^{[1
]}

Li, Yanan ^{[1
]}

Wang, Jing ^{[1
]}

Zhu, Xianjun ^{[1
]}

机构：

[1] Cent China Normal Univ, Coll Chem, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China

来源：

SOLID STATE IONICS | 2018年 / 327卷

关键词：

Vanadium sulfide; rGO; Anode; Sodium ion battery; CARBON-COATED NA3V2(PO4)(3); LITHIUM; NANOSHEETS; NANOTUBES; CATHODE;

D O I：

10.1016/j.ssi.2018.10.022

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：

Nanorod vanadium sulfide wrapped by reduced graphene oxide (rGO) composite is synthesized by a facile solvothermal reaction. Nanorod vanadium sulfide is uniformly distributed on the surface of rGO nanosheets. As an anode for sodium ion batteries, the composite with 13 wt% rGO has 1203.8 and 781.4 mAh g-1 specific capacities for the first discharge and charge, respectively, with 64.9% of Coulombic efficiency, higher than that of pure vanadium sulfide submicrospheres. The sodiation/desodiation mechanism is investigated by cyclic voltanimetry, electrochemical impedance spectrum and discharging-charging measurement. The results show that the vanadium sulfide/rGO composite can convert to sodium sulfide + vanadium/rGO composite after the first cycle, and the rGO can inhibit the dissolution of polysulfide while metal vanadium increases electrode conductivity, resulting in the enhanced electrochemical performance.

引用

页码：129 / 135

页数：7

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