Development of bipolar all-solid-state lithium battery based on quasi-solid-state electrolyte containing tetraglyme-LiTFSA equimolar complex.
The development of high energy-density lithium-ion secondary batteries as storage batteries in vehicles is attracting increasing attention. In this study, high-voltage bipolar stacked batteries with a quasi-solid-state electrolyte containing a Li-Glyme complex were prepared, and the performance of the device was evaluated. Via the successful production of double-layered and triple-layered high-voltage devices, it was confirmed that these stacked batteries operated properly without any internal short-circuits of a single cell within the package: Their plateau potentials (6.7 and 10.0 V, respectively) were two and three times that (3.4 V) of the single-layered device, respectively. Further, the double-layered device showed a capacity retention of 99% on the 200th cycle at 0.5 C, which is an indication of good cycling properties. These results suggest that bipolar stacked batteries with a quasi-solid-state electrolyte containing a Li-Glyme complex could readily produce a high voltage of 10 V.
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 KatahiraAoba-ku, Sendai, Miyagi 980-8577, Japan.
Yoshiyuki
Y
Gambe
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 KatahiraAoba-ku, Sendai, Miyagi 980-8577, Japan.
Yan
Y
Sun
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 KatahiraAoba-ku, Sendai, Miyagi 980-8577, Japan.
Itaru
I
Honma