Lithium diffusion in LiMnPO4 detected with mu +/- SR
Artikel i vetenskaplig tidskrift, 2020

Positive- and negative-muon spin rotation and relaxation (mu(+/-) SR) was first used to investigate fluctuations of nuclear magnetic fields in an olivine-type battery material, LiMnPO4, in order to clarify the diffusive species, namely, to distinguish between a mu(+) hopping among interstitial sites and Li+ ions diffusing in the LiMnPO4 lattice. Muon diffusion can only occur in mu+SR, because the implanted mu(-) forms a stable muonic atom at the lattice site, and therefore any change in linewidth measured with mu-SR must be due to Li+ diffusion. Since the two measurements exhibit a similar increase in the field fluctuation rate with temperature above 100 K, it is confirmed that Li+ ions are in fact diffusing. The diffusion coefficient of Li+ at 300 K and its activation energy were estimated to be 1.4(3) x 10(-10) cm(2)/s and 0.19(3) eV, respectively. Such combined mu(SR)-S-+/- measurements are thus shown to be a suitable tool for detecting ion diffusion in solid-state energy materials.

Författare

Jun Sugiyama

Comprehensive Research Organization for Science and Society (CROSS)

High Energy Accelerator Research Organization

Japan Atomic Energy Agency

Ola Kenji Forslund

Kungliga Tekniska Högskolan (KTH)

Elisabetta Nocerino

Kungliga Tekniska Högskolan (KTH)

Nami Matsubara

Kungliga Tekniska Högskolan (KTH)

Konstantinos Papadopoulos

Chalmers, Fysik, Materialfysik

Yasmine Sassa

Chalmers, Fysik, Materialfysik

Stephen P. Cottrell

STFC Rutherford Appleton Laboratory

Adrian D. Hillier

STFC Rutherford Appleton Laboratory

Katsuhiko Ishida

RIKEN

Martin Mansson

Kungliga Tekniska Högskolan (KTH)

Jess H. Brewer

TRIUMF

University of British Columbia (UBC)

PHYSICAL REVIEW RESEARCH

2643-1564 (eISSN)

Vol. 2 3 033161

Ämneskategorier

Oorganisk kemi

Materialkemi

Annan kemiteknik

DOI

10.1103/PhysRevResearch.2.033161

Mer information

Senast uppdaterat

2021-01-21