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Morphology controlled lithium storage in Li3VO4 anodes

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Abstract

Li3VO4 (LVO) anode materials with controllable morphologies ranging from spherical-assemblies, single-crystal nanorods, and flower shapes to bulk-shapes were fabricated via a solvothermal approach using different alcohols (i.e., ethanol, methanol, propanol, and butanol). XRD, SEM, BET, Raman and FTIR and galvanostatic charge/discharge measurements were carried out to correlate their structure/morphology with their electrochemical characteristics. The experimental results reveal that both structure and morphology play important roles in the Li+ ion storage of LVO, which degrades in the sequential order from nanorods, to spheres, to flowers and finally to bulk. The LVO nanorods are hierarchical and have a small particle size, high specific surface area, and high crystallinity; thus, they exhibit the largest Li+ ion diffusion coefficient and best electrochemical performance among the four electrodes. Moreover, coating carbon on the single-crystal LVO nanorods further enhances their Li+ ion storage ability. Consequently, the carbon-coated LVO nanorods deliver a high reversible capacity of 440 mA h gāˆ’1 at 0.1 A gāˆ’1 with good cycling stability and demonstrate great practical application. In addition, the results promote a better fundamental understanding of the Li+ ion storage behavior in LVO and provide insight into the optimal design of LVO and other vanadium-based electrode materials.

Graphical abstract: Morphology controlled lithium storage in Li3VO4 anodes

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Publication details

The article was received on 13 Oct 2017, accepted on 27 Nov 2017 and first published on 27 Nov 2017


Article type: Paper
DOI: 10.1039/C7TA09023D
Citation: J. Mater. Chem. A, 2018, Advance Article
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    Morphology controlled lithium storage in Li3VO4 anodes

    G. Yang, B. Zhang, J. Feng, Y. Lu, Z. Wang, V. Aravindan, M. Aravind, J. Liu, M. Srinivasan, Z. Shen and Y. Huang, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C7TA09023D

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