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Surface phonons of lithium ion battery active materials
Swiss Fed Inst Technol, Dept Informat Technol & Elect Engn, CH-8092 Zurich, Switzerland..
Swiss Fed Inst Technol, Dept Informat Technol & Elect Engn, CH-8092 Zurich, Switzerland..
Univ Bath, Dept Chem, Bath BA2 7AY, Avon, England..
Swiss Fed Inst Technol, Dept Informat Technol & Elect Engn, CH-8092 Zurich, Switzerland..
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2019 (English)In: SUSTAINABLE ENERGY & FUELS, ISSN 2398-4902, Vol. 3, no 2, p. 508-513Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY , 2019. Vol. 3, no 2, p. 508-513
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URN: urn:nbn:se:kth:diva-244533DOI: 10.1039/c8se00389kISI: 000457548700015Scopus ID: 2-s2.0-85060780741OAI: oai:DiVA.org:kth-244533DiVA, id: diva2:1302163
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QC 20190403

Available from: 2019-04-03 Created: 2019-04-03 Last updated: 2019-04-03Bibliographically approved

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Månsson, Martin

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  • apa
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