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Issue 47, 2018
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Operando investigations of lithiation and delithiation processes in a BiVO4 anode material

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Abstract

BiVO4 undergoes a series of conversion and alloying reactions as an anode material in lithium ion batteries. The current work demonstrates a charge capacity of 485 mA h g−1 after 50 cycles in a voltage range of 0–2.00 V (graphite has a capacity of 372 mA h g−1 theoretically). An exceptionally high volumetric capacity makes BiVO4 suitable for compact applications (volumetric capacity of 3984 mA h cm−3 for BiVO4 in comparison to 756 mA h cm−3 for graphite theoretically). Reaction steps and electronic transformations have been identified by operando quasi simultaneous synchrotron X-ray diffraction and absorption spectroscopy studies. An irreversible reaction step occurs for the Bi3+/Bi0 redox pair, whereas reversible mechanisms are found for the V5+/V3+ and Bi0/Bi3− redox pairs. The proposed mechanisms are supported by density functional theory (DFT) calculations.

Graphical abstract: Operando investigations of lithiation and delithiation processes in a BiVO4 anode material

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Publication details

The article was received on 21 Aug 2018, accepted on 09 Nov 2018 and first published on 09 Nov 2018


Article type: Paper
DOI: 10.1039/C8CP05330H
Citation: Phys. Chem. Chem. Phys., 2018,20, 29798-29803

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    Operando investigations of lithiation and delithiation processes in a BiVO4 anode material

    A. Ruud, J. Sottmann, P. Vajeeston and H. Fjellvåg, Phys. Chem. Chem. Phys., 2018, 20, 29798
    DOI: 10.1039/C8CP05330H

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