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Issue 2, 2019
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Surface phonons of lithium ion battery active materials

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Abstract

Surfaces of active materials are understood to play an important role in the performance and lifetime of lithium-ion batteries, but they remain poorly characterized and therefore cannot yet be systematically designed. Here, we combine inelastic neutron scattering and ab initio simulations to demonstrate that the structure of the surface of active materials differs from the interior of the particle. We use LiFePO4 (LFP) as a model system, and we find that carbon coating influences the Li–O bonding on the (010) LFP surface relative to the bulk. Our results highlight how coatings can be used to systematically engineer the vibrations of atoms at the surface of battery active materials, and thereby impact lithium ion transport, charge transfer, and surface reactivity.

Graphical abstract: Surface phonons of lithium ion battery active materials

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Publication details

The article was received on 28 Jul 2018, accepted on 03 Dec 2018 and first published on 07 Jan 2019


Article type: Paper
DOI: 10.1039/C8SE00389K
Citation: Sustainable Energy Fuels, 2019,3, 508-513
  • Open access: Creative Commons BY-NC license
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    Surface phonons of lithium ion battery active materials

    P. Benedek, N. Yazdani, H. Chen, N. Wenzler, F. Juranyi, M. Månsson, M. S. Islam and V. C. Wood, Sustainable Energy Fuels, 2019, 3, 508
    DOI: 10.1039/C8SE00389K

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