TY - JOUR
T1 - Lithium diffusion coefficient in amorphous lithium phosphate thin films measured by secondary ion mass spectroscopy with isotope exchange methods
AU - Kuwata, Naoaki
AU - Lu, Xiaoli
AU - Miyazaki, Takamichi
AU - Iwai, Yoshiki
AU - Tanabe, Tadao
AU - Kawamura, Junichi
N1 - Funding Information:
The authors thank to Dr. Tetsutaro Hayashi and Mr. Eiji Toda of Sumitomo Metal Mine Co. Ltd., for the preparation of 6 Li samples and fruitful discussions. For the SIMS equipment, we thank the “Center for Fusion Research of Nano-Interface Devices, Tohoku University” of “Low-Carbon Research Network” funded by MEXT (Ministry of Education, Culture, Sports, Science and Technology), Japan . This work was supported by JSPS KAKENHI Grant Number 15H03872 . This research was financially supported by JST, ALCA-SPRING .
Publisher Copyright:
© 2016 The Authors
PY - 2016/10/15
Y1 - 2016/10/15
N2 - Lithium diffusion coefficients in amorphous lithium phosphate (a-Li3PO4) thin films were determined by secondary ion mass spectroscopy (SIMS), using 7Li and 6Li stable isotopes. The diffusion couples were prepared by an ion-exchange method using liquid electrolyte and a mask method based on thin-film deposition. The tracer diffusion coefficient, DLi ⁎, was evaluated by analyzing the isotope profiles obtained by SIMS in the temperature range of 25–160 °C. The diffusion coefficient of a-Li3PO4 was 6.0 × 10− 13 cm2/s at 25 °C, while the activation energy was 0.58 eV, as measured for the samples prepared by using the ion-exchange method. The conductivity diffusion coefficient, Dσ, was calculated from the thin film ionic conductivity, which was determined by impedance spectroscopy. The correlation factor, HR, was 0.55 ± 0.20 in the measured temperature range, which indicated the cooperative motion of lithium ions in lithium phosphate glasses.
AB - Lithium diffusion coefficients in amorphous lithium phosphate (a-Li3PO4) thin films were determined by secondary ion mass spectroscopy (SIMS), using 7Li and 6Li stable isotopes. The diffusion couples were prepared by an ion-exchange method using liquid electrolyte and a mask method based on thin-film deposition. The tracer diffusion coefficient, DLi ⁎, was evaluated by analyzing the isotope profiles obtained by SIMS in the temperature range of 25–160 °C. The diffusion coefficient of a-Li3PO4 was 6.0 × 10− 13 cm2/s at 25 °C, while the activation energy was 0.58 eV, as measured for the samples prepared by using the ion-exchange method. The conductivity diffusion coefficient, Dσ, was calculated from the thin film ionic conductivity, which was determined by impedance spectroscopy. The correlation factor, HR, was 0.55 ± 0.20 in the measured temperature range, which indicated the cooperative motion of lithium ions in lithium phosphate glasses.
KW - Diffusion coefficient
KW - Haven ratio
KW - Pulsed laser deposition
KW - Thin-film battery
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U2 - 10.1016/j.ssi.2016.06.015
DO - 10.1016/j.ssi.2016.06.015
M3 - Article
AN - SCOPUS:84978880809
SN - 0167-2738
VL - 294
SP - 59
EP - 66
JO - Solid State Ionics
JF - Solid State Ionics
ER -