Cu doped V2O5 flowers as cathode material for high-performance lithium ion batteries

Hong Yu; Xianhong Rui; Huiteng Tan; Jing Chen; Xin Huang; Chen Xu; Weiling Liu; Denis Y. W. Yu; Huey Hoon Hng; Harry E. Hoster; Qingyu Yan

doi:10.1039/C3NR00548H

Cu doped V₂O₅ flowers as cathode material for high-performance lithium ion batteries†

Hong Yu,^ab Xianhong Rui,^ab Huiteng Tan,^ab Jing Chen,^a Xin Huang,^a Chen Xu,^ab Weiling Liu,^a Denis Y. W. Yu,^b Huey Hoon Hng,^a Harry E. Hoster^b and Qingyu Yan*^abc

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^a School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
E-mail: alexyan@ntu.edu.sg
Fax: +65 6790 9081
Tel: +65 6790 4583

^b TUM CREATE Centre for Electromobility, Nanyang Technological University, Singapore 637459, Singapore

^c Energy Research Institute at NTU, Nanyang Technological University, Singapore 637459, Singapore

Abstract

Hierarchical Cu doped vanadium pentoxide (V₂O₅) flowers were prepared via a simple hydrothermal approach followed by an annealing process. The flower precursors are self-assembled with 1D nanobelts surrounding a central core. The morphological evolution is investigated and a plausible mechanism is proposed. As the cathode material for lithium ion batteries, the Cu doped V₂O₅ samples exhibit improved electrochemical performance compared to the un-doped ones. Among them Cu_0.02V_1.98O₅ delivered higher reversible specific capacities, better cycling stabilities and excellent rate capabilities, e.g. 97 mA h g⁻¹ at 20.0 C.

Nanoscale

Cu doped V₂O₅ flowers as cathode material for high-performance lithium ion batteries†

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Cu doped V₂O₅ flowers as cathode material for high-performance lithium ion batteries

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