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  • Development of bipolar all-solid-state lithium battery based on quasi-solid-state electrolyte containing tetraglyme-LiTFSA equimolar complex.

Development of bipolar all-solid-state lithium battery based on quasi-solid-state electrolyte containing tetraglyme-LiTFSA equimolar complex.

Scientific reports (2015-03-10)
Yoshiyuki Gambe, Yan Sun, Itaru Honma
ABSTRACT

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.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Bis(trifluoromethane)sulfonimide lithium salt, puriss., ≥99.0% (19F-NMR)
Sigma-Aldrich
Tetraethylene glycol dimethyl ether, ≥99%
Sigma-Aldrich
Bis(trifluoromethane)sulfonimide lithium salt, 99.95% trace metals basis
Sigma-Aldrich
Bis(trifluoromethane)sulfonimide lithium salt
Sigma-Aldrich
Dimethyl ether, ≥99.9%
Sigma-Aldrich
Dimethyl ether, ≥99%
Sigma-Aldrich
Dimethyl ether, puriss., ≥99.9% (GC)
Sigma-Aldrich
Tetraethylene glycol, 99%
Sigma-Aldrich
Dimethyl ether, puriss., ≥99.9% (GC)