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Atomically Well-Ordered Structure at Solid Electrolyte and Electrode Interface Reduces the Interfacial Resistance
被引:63
|作者:
Shiraki, Susumu
[1
,2
]
Shirasawa, Tetsuroh
[3
,4
]
Suzuki, Tohru
[2
]
Kawasoko, Hideyuki
[2
]
Shimizu, Ryota
[2
,4
,5
]
Hitosugi, Taro
[2
,5
]
机构:
[1] Nippon Inst Technol, Dept Appl Chem, Saitama 3458501, Japan
[2] Tohoku Univ, AIMR, Sendai, Miyagi 9808577, Japan
[3] Natl Inst Adv Ind Sci & Technol, Natl Metrol Inst Japan, Tsukuba, Ibaraki 3058565, Japan
[4] JST, PRESTO, Kawaguchi, Saitama 3320012, Japan
[5] Tokyo Inst Technol, Sch Mat & Chem Technol, Tokyo 1528552, Japan
基金:
日本科学技术振兴机构;
关键词:
X-ray crystal truncation rod scattering;
thin film;
all-solid-state battery;
solid-electrolyte/electrode interface;
LiCoO2;
Li3PO4;
interface resistance;
LITHIUM BATTERIES;
THIN-FILMS;
D O I:
10.1021/acsami.8b08926
中图分类号:
TB3 [工程材料学];
学科分类号:
0805 ;
080502 ;
摘要:
Using synchrotron surface X-ray diffraction, we investigated the atomic structures of the interfaces of a solid electrolyte (Li3PO4) and electrode (LiCoO2). 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 LiCoO2 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.
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页码:41732 / 41737
页数:6
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