Issue 2, 2018

Morphology controlled lithium storage in Li3VO4 anodes

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 g−1 at 0.1 A g−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

Supplementary files

Article information

Article type
Paper
Submitted
13 Oct 2017
Accepted
27 Nov 2017
First published
27 Nov 2017

J. Mater. Chem. A, 2018,6, 456-463

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, 6, 456 DOI: 10.1039/C7TA09023D

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