The operation of solid-state Li batteries, which are promising power supplies for portable electronic devices and electric vehicles, is accompanied by heating. Therefore, investigating the thermal stability of battery systems is essential. In this study, we report the impact of annealing on the interface of a Li3PO4 electrolyte and LiNi0.5Mn1.5O4 electrode in thin-film batteries. The batteries with the interface annealed at 200 °C show low Li3PO4–LiNi0.5Mn1.5O4 interface resistance of 7.2 Ω cm2. Furthermore, the batteries exhibit stable charge–discharge characteristics with high current density up to 1170 μA cm−2, similar to those of batteries with the non-annealing interface. The batteries with the interface annealed at 450 °C show high Li3PO4–LiNi0.5Mn1.5O4 interface resistance of 490 Ω cm2, resulting in low battery performance. X-ray photoemission spectroscopy indicates that the P in Li3PO4 is reduced by high-temperature annealing, possibly causing the performance degradation of batteries. This study provides an in-depth understanding of the interfaces of solid-state batteries and is expected to facilitate the development of thermally stable batteries.
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29 April 2024
Research Article|
April 29 2024
Impact of annealing on the resistance of Li3PO4 electrolyte–LiNi0.5Mn1.5O4 electrode interfaces Available to Purchase
Hideyuki Kawasoko
;
Hideyuki Kawasoko
a)
(Conceptualization, Data curation, Investigation, Validation, Writing – original draft, Writing – review & editing)
1
Department of Chemistry, Graduate School of Science, Tohoku University
, Sendai 980-8577, Japan
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Susumu Shiraki
;
Susumu Shiraki
(Data curation, Funding acquisition, Investigation, Validation, Writing – review & editing)
2
Department of Applied Chemistry, Nippon Institute of Technology
, Saitama 345-8501, Japan
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Kazunori Nishio
;
Kazunori Nishio
(Data curation, Investigation, Writing – review & editing)
3
School of Materials and Chemical Technology, Tokyo Institute of Technology
, Tokyo 152-8550, Japan
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Asuka Oi;
Asuka Oi
(Data curation, Investigation, Writing – review & editing)
3
School of Materials and Chemical Technology, Tokyo Institute of Technology
, Tokyo 152-8550, Japan
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Ryota Shimizu;
Ryota Shimizu
(Funding acquisition, Writing – review & editing)
4
Department of Chemistry, The University of Tokyo
, Tokyo 113-0033, Japan
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Taro Hitosugi
Taro Hitosugi
a)
(Conceptualization, Funding acquisition, Writing – review & editing)
4
Department of Chemistry, The University of Tokyo
, Tokyo 113-0033, Japan
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Hideyuki Kawasoko
1,a)
Susumu Shiraki
2
Kazunori Nishio
3
Asuka Oi
3
Ryota Shimizu
4
Taro Hitosugi
4,a)
1
Department of Chemistry, Graduate School of Science, Tohoku University
, Sendai 980-8577, Japan
2
Department of Applied Chemistry, Nippon Institute of Technology
, Saitama 345-8501, Japan
3
School of Materials and Chemical Technology, Tokyo Institute of Technology
, Tokyo 152-8550, Japan
4
Department of Chemistry, The University of Tokyo
, Tokyo 113-0033, Japan
Appl. Phys. Lett. 124, 181601 (2024)
Article history
Received:
January 22 2024
Accepted:
April 14 2024
Citation
Hideyuki Kawasoko, Susumu Shiraki, Kazunori Nishio, Asuka Oi, Ryota Shimizu, Taro Hitosugi; Impact of annealing on the resistance of Li3PO4 electrolyte–LiNi0.5Mn1.5O4 electrode interfaces. Appl. Phys. Lett. 29 April 2024; 124 (18): 181601. https://doi.org/10.1063/5.0199278
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