One-step hydrothermal synthesis of graphene decorated V2O5 nanobelts for enhanced electrochemical energy storage

被引：195

作者：

Lee, Minoh ^{[1
]}

Balasingam, Suresh Kannan ^{[2
]}

Jeong, Hu Young ^{[3
]}

Hong, Won G. ^{[4
]}

Lee, Han-Bo-Ram

Kim, Byung Hoon ^{[5
]}

Jun, Yongseok ^{[6
]}

机构：

[1] UNIST, Dept Chem Engn, Ulsan 689798, South Korea

[2] UNIST, Dept Chem, Ulsan 689798, South Korea

[3] UNIST, Sch Mat Sci & Engn, Ulsan 689798, South Korea

[4] Korea Basic Sci Inst, Div Mat Sci, Taejon 305333, South Korea

[5] Incheon Natl Univ, Dept Phys, Inchon 406772, South Korea

[6] Konkuk Univ, Dept Mat Chem & Engn, Seoul 143701, South Korea

来源：

SCIENTIFIC REPORTS | 2015年 / 5卷

基金：

新加坡国家研究基金会;

关键词：

VANADIUM-OXIDE NANOWIRE; HIGH-PERFORMANCE ANODE; ELECTRODE MATERIAL; CATHODE MATERIALS; REDUCTION; COMPOSITES; NANOCOMPOSITE; SUPERCAPACITORS; INTERCALATION; TRANSPARENT;

D O I：

10.1038/srep08151

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Graphene-decorated V2O5 nanobelts (GVNBs) were synthesized via a low-temperature hydrothermal method in a single step. V2O5 nanobelts (VNBs) were formed in the presence of graphene oxide, a mild oxidant, which also enhanced the conductivity of GVNBs. From the electron energy loss spectroscopy analysis, the reduced graphene oxide (rGO) are inserted into the layered crystal structure of V2O5 nanobelts, which further confirmed the enhanced conductivity of the nanobelts. The electrochemical energy-storage capacity of GVNBs was investigated for supercapacitor applications. The specific capacitance of GVNBs was evaluated using cyclic voltammetry (CV) and charge/discharge (CD) studies. The GVNBs having V2O5-rich composite, namely, V(3)G(1) (VO/GO = 3:1), showed superior specific capacitance in comparison to the other composites (V(1)G(1) and V(1)G(3)) and the pure materials. Moreover, the V(3)G(1) composite showed excellent cyclic stability and the capacitance retention of about 82% was observed even after 5000 cycles.

引用

页数：8

共 61 条

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