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Quantifying Diffusion through Interfaces of Lithium-Ion Battery Active Materials
Swiss Fed Inst Technol, Dept Informat Technol & Elect Engn, CH-8092 Zurich, Switzerland..
KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.ORCID iD: 0000-0001-8879-7875
KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.ORCID iD: 0000-0003-4441-8882
Swiss Fed Inst Technol, Dept Informat Technol & Elect Engn, CH-8092 Zurich, Switzerland..
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2020 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 12, no 14, p. 16243-16249Article in journal (Refereed) Published
Abstract [en]

Detailed understanding of charge diffusion processes in a lithium-ion battery is crucial to enable its systematic improvement. Experimental investigation of diffusion at the interface between active particles and the electrolyte is challenging but warrants investigation as it can introduce resistances that, for example, limit the charge and discharge rates. Here, we show an approach to study diffusion at interfaces using muon spin spectroscopy. By performing measurements on LiFePO4 platelets with different sizes, we determine how diffusion through the LiFePO4 (010) interface differs from that in the center of the particle (i.e., bulk diffusion). We perform ab initio calculations to aid the understanding of the results and show the relevance of our interfacial diffusion measurement to electrochemical performance through cyclic voltammetry measurements. These results indicate that surface engineering can be used to improve the performance of lithium-ion batteries.

Place, publisher, year, edition, pages
American Chemical Society (ACS) , 2020. Vol. 12, no 14, p. 16243-16249
Keywords [en]
solid-state diffusion, lithium-ion batteries, muon spin spectroscopy, ab initio simulations, cyclic voltammetry, LiFePO4
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URN: urn:nbn:se:kth:diva-273129DOI: 10.1021/acsami.9b21470ISI: 000526583500027PubMedID: 32163263Scopus ID: 2-s2.0-85083084739OAI: oai:DiVA.org:kth-273129DiVA, id: diva2:1432105
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QC 20200526

Available from: 2020-05-26 Created: 2020-05-26 Last updated: 2023-12-07Bibliographically approved

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Forslund, Ola KenjiNocerino, ElisabettaMatsubara, NamiMånsson, Martin

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