Synthesis of V2O5 hierarchical structures for long cycle-life lithium-ion storage. Issue 3 (26th November 2014)

• Record Type: Journal Article
• Authors: Li, Guizhu; Qiu, Yongcai; Hou, Yuan; Li, Hongfei; Zhou, Lisha; Deng, Hong; Zhang, Yuegang
• Is Part Of: Journal of materials chemistry. Volume 3:Issue 3(2015)
• Page Start: 1103
• Page End: 1109
• Publication Date: 2014-11-26
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c4ta04864d
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : The "flower-like" vanadium pentoxide hierarchical structure assembled from ultrathin nanosheets is a promising electrode material for high-rate and long-cycle-life lithium-ion batteries. Abstract : A facile solvothermal method was used to synthesize V2 O5 nanosheet hierarchical structures. Using different solvent systems, we obtained the hierarchical structures with different nanosheet thicknesses of <10 nm, 50–100 nm and 100–200 nm, respectively. A systematic investigation of their electrochemical properties showed that both the reversible lithium storage capacity and the cycling stability increased with the reduced thickness of nanosheets. In order to prevent the serious structural damage of the V2 O5 electrodes during cycling, we employed a voltage-regulation charge/discharge scheme which led to a long cycle-life with an average capacity decay of 0.04% (2.0 to 3.0 V) and 0.10% per cycle (2.8 to 4.0 V) over 500 cycles.