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J. Korean Ceram. Soc. > Volume 58(3); 2021 > Article
Journal of the Korean Ceramic Society 2021;58(3): 373-377.
doi: https://doi.org/10.1007/s43207-021-00110-y
The study on the interface characteristics of solid-state electrolyte
Hyung-Sik Lim1, Liyu Liu1, Hyun-Joon Lee1, Jae-Min Cha2, Duck-ki Yoon3, Bong-Ki Ryu1
1Department of Materials Science and Engineering , Pusan National University, Busan 46241, South Korea
2The Institute of Materials Technology , Pusan National University , Busan 46241, South Korea
3R&D Center , Jeong Kwan Display Co. Ltd. , Gyeongsangnam-do 50581, South Korea
Correspondence  Bong-Ki Ryu ,Email: bkryu@pusan.ac.kr
Received: December 16, 2020; Revised: January 21, 2021   Accepted: January 25, 2021.  Published online: May 31, 2021.
ABSTRACT
Solid electrolytes for all-solid-state lithium batteries are excellent in terms of stability, and their performance has been improved through many studies. However, due to the interfacial reaction with lithium and sold electrolyte, there is a problem that the performance is deteriorated when used for a long time. In this study, the charge/discharge evaluation of more than 50 cycles was conducted and we analyzed the change Ti4+ to Ti3+ in the solid electrolyte using X-ray photoelectron spectroscopy. Finally, it was confirmed that the performance of the LiNbO3-coated solid electrolyte did not decrease even after long-term use.
Key words: All-solid-state lithium batteries · Solid electrolyte · Interfacial reaction
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