Reduced graphene oxide supported highly porous V2O5 spheres as a high-power cathode material for lithium ion batteries

被引：143

作者：

Rui, Xianhong ^{[1
,2
]}

Zhu, Jixin ^{[2
]}

Sim, Daohao ^{[2
]}

Xu, Chen ^{[2
]}

Zeng, Yi ^{[2
]}

Hng, Huey Hoon ^{[2
]}

Lim, Tuti Mariana ^{[1
,3
]}

Yan, Qingyu ^{[2
,4
,5
]}

机构：

[1] Nanyang Technol Univ, Sch Civil & Environm Engn, Singapore 639798, Singapore

[2] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

[3] Ngee Ann Polytech, Sch Life Sci & Chem Technol, Singapore 599489, Singapore

[4] Nanyang Technol Univ, Energy Res Inst, Singapore 637459, Singapore

[5] Nanyang Technol Univ, TUM CREATE Ctr Electromobil, Singapore 637459, Singapore

来源：

NANOSCALE | 2011年 / 3卷 / 11期

关键词：

HIGH-PERFORMANCE; ELECTRODE MATERIALS; ANODE MATERIAL; CAPACITY; NANOPARTICLES; SHEETS; FILMS;

D O I：

10.1039/c1nr10879d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Reduced graphene oxide (rGO) supported highly porous polycrystalline V2O5 spheres (V2O5/rGO) were prepared by using a solvothermal approach followed by an annealing process. Initially, reduced vanadium oxide (rVO) nanoparticles with sizes in the range of 10-50 nm were formed through heterogeneous nucleation on rGO sheets during the solvothermal process. These rVO nanoparticles were oxidized to V2O5 after the annealing process in air at 350 degrees C and assembled into polycrystalline porous spheres with sizes of 200-800 nm. The weight ratio between the rGO and V2O5 is tunable by changing the weight ratio of the precursors, which in turn affects the morphology of V2O5/rGO composites. The V2O5/rGO composites display superior cathode performances with highly reversible specific capacities, good cycling stabilities and excellent rate capabilities (e.g. 102 mA h g(-1) at 19 degrees C).

引用

页码：4752 / 4758

页数：7

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