TY - JOUR
T1 - Atomically Well-Ordered Structure at Solid Electrolyte and Electrode Interface Reduces the Interfacial Resistance
AU - Shiraki, Susumu
AU - Shirasawa, Tetsuroh
AU - Suzuki, Tohru
AU - Kawasoko, Hideyuki
AU - Shimizu, Ryouta
AU - Hitosugi, Taro
N1 - Funding Information:
This study was supported by the “Applied and Practical LiB Development for Automobile and Multiple Application” project of the New Energy and Industrial Technology Development Organization (NEDO), Private University Research Branding Project from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), the Advanced Low Carbon Technology Research and Development Program (ALCA), PREST (JPMJPR13C5), and CREST of the Japan Science and Technology Agency (JST). The authors also acknowledge the support of Toyota Motor Corporation. T.S., S.S., and T.H. acknowledge a Grant-in-Aid for Scientific Research (no. 26105008, no. 25390072, no. 26106502, no. 26108702, no. 26246022, no. 26610092, and no. 16H03864) from MEXT, Japan. The synchrotron radiation experiments were performed at PF with the approval of Photon Factory Program Advisory Committee Proposals no. 2014G155 and no. 2015G661. The authors thank Professor Munekazu Motoyama, Professor Akichika Kumatani, and Professor Masakazu Hatura for helpful discussions about the interpretation of impedance spectra.
Publisher Copyright:
Copyright © 2018 American Chemical Society.
PY - 2018/12/5
Y1 - 2018/12/5
N2 - Using synchrotron surface X-ray diffraction, we investigated the atomic structures of the interfaces of a solid electrolyte (Li 3 PO 4 ) and electrode (LiCoO 2 ). We prepared two types of interfaces with high and low interface resistances; the low-resistance interface exhibited a flat and well-ordered atomic arrangement at the electrode surface, whereas the high-resistance interface showed a disordered interface. These results indicate that the crystallinity of LiCoO 2 at the interface has a significant impact on interface resistance. Furthermore, we reveal that the migration of Li ions along the interface and into grain boundaries and antiphase domain boundaries is a critical factor reducing interface resistance.
AB - Using synchrotron surface X-ray diffraction, we investigated the atomic structures of the interfaces of a solid electrolyte (Li 3 PO 4 ) and electrode (LiCoO 2 ). We prepared two types of interfaces with high and low interface resistances; the low-resistance interface exhibited a flat and well-ordered atomic arrangement at the electrode surface, whereas the high-resistance interface showed a disordered interface. These results indicate that the crystallinity of LiCoO 2 at the interface has a significant impact on interface resistance. Furthermore, we reveal that the migration of Li ions along the interface and into grain boundaries and antiphase domain boundaries is a critical factor reducing interface resistance.
KW - Li PO
KW - LiCoO
KW - X-ray crystal truncation rod scattering
KW - all-solid-state battery
KW - interface resistance
KW - solid-electrolyte/electrode interface
KW - thin film
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U2 - 10.1021/acsami.8b08926
DO - 10.1021/acsami.8b08926
M3 - Article
C2 - 30465729
AN - SCOPUS:85057522461
SN - 1944-8244
VL - 10
SP - 41732
EP - 41737
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
IS - 48
ER -