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LiCr(MoO4)2: a new high specific capacity cathode material for lithium ion batteries

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Abstract

Molybdate polyanion cathode materials have received lots of research interest for their high specific capacity, high cycling stability and interesting physical and chemical properties. Here, LiCr(MoO4)2, a new deintercalation–intercalation type cathode material for lithium ion batteries, is synthesized and studied. Ultraviolet-visible-near-infrared diffuse reflection, density functional theory calculation and four-probe measurement results suggest that LiCr(MoO4)2 possesses a narrow band gap and high electronic conductivity. Bond-valence-sum maps calculation and electrochemical impedance spectroscopy prove the fast lithium ion transport rate of LiCr(MoO4)2. Benefiting from these advantages, LiCr(MoO4)2 delivers a high specific capacity (250 mA h g−1) and good rate performances. The electrochemical reaction mechanism is studied by in situ X-ray diffraction, which indicates that the lithium ion deintercalation–intercalation is a solid solution process with Cr3+/2+ and Mo6+/5+ redox.

Graphical abstract: LiCr(MoO4)2: a new high specific capacity cathode material for lithium ion batteries

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Publication details

The article was received on 25 Oct 2018, accepted on 28 Nov 2018 and first published on 29 Nov 2018


Article type: Paper
DOI: 10.1039/C8TA10274K
Citation: J. Mater. Chem. A, 2019, Advance Article
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    LiCr(MoO4)2: a new high specific capacity cathode material for lithium ion batteries

    K. Feng, F. Wang, X. Yang, H. Zhang, X. Li and H. Zhang, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C8TA10274K

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