Quantifying Diffusion through Interfaces of Lithium-Ion Battery Active Materials
Journal article, 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.

cyclic voltammetry

lithium-ion batteries

solid-state diffusion

LiFePO4

ab initio simulations

muon spin spectroscopy

Author

Peter Benedek

Swiss Federal Institute of Technology in Zürich (ETH)

Ola Kenji Forslund

Royal Institute of Technology (KTH)

E. Nocerino

Royal Institute of Technology (KTH)

Nuri Yazdani

Swiss Federal Institute of Technology in Zürich (ETH)

Nami Matsubara

Royal Institute of Technology (KTH)

Yasmine Sassa

Chalmers, Physics, Materials Physics

Fanni Jurànyi

Paul Scherrer Institut

Marisa Medarde

Paul Scherrer Institut

Mark Telling

Rutherford Appleton Laboratory

Martin Månsson

Royal Institute of Technology (KTH)

Vanessa Wood

Swiss Federal Institute of Technology in Zürich (ETH)

ACS Applied Materials & Interfaces

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

Vol. 12 14 16243-16249

Subject Categories

Other Chemistry Topics

Condensed Matter Physics

DOI

10.1021/acsami.9b21470

PubMed

32163263

More information

Latest update

8/28/2020