Quantifying Diffusion through Interfaces of Lithium-Ion Battery Active Materials
Artikel i vetenskaplig tidskrift, 2020

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.

ab initio simulations

solid-state diffusion

muon spin spectroscopy

lithium-ion batteries

cyclic voltammetry



Peter Benedek

Eidgenössische Technische Hochschule Zürich (ETH)

Ola Kenji Forslund

Kungliga Tekniska Högskolan (KTH)

E. Nocerino

Kungliga Tekniska Högskolan (KTH)

Nuri Yazdani

Eidgenössische Technische Hochschule Zürich (ETH)

Nami Matsubara

Kungliga Tekniska Högskolan (KTH)

Yasmine Sassa

Chalmers, Fysik, Materialfysik

Fanni Jurànyi

Paul Scherrer Institut

Marisa Medarde

Paul Scherrer Institut

Mark Telling

STFC Rutherford Appleton Laboratory

Martin Månsson

Kungliga Tekniska Högskolan (KTH)

Vanessa Wood

Eidgenössische Technische Hochschule Zürich (ETH)

ACS Applied Materials & Interfaces

1944-8244 (ISSN) 1944-8252 (eISSN)

Vol. 12 14 16243-16249


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