OYO BUTURI
Vol.88
No.7
2019
7
20197887452
OYO BUTURI Vol.88 No.7 (2019)
Our Research

Improving the power density of a lithium ion battery by loading an artificial solid electrolyte interface

Takashi TERANISHI1

An artificial solid electrolyte interface (SEI) effectively improves the power density of a lithium ion battery, LIB. Atomic layer deposition (ALD) was used to deposit Al2O3, as an artificial SEI, on the cathode active materials. The modified electrode displayed a discharge capacity of 〜110 mAh/g at a 50C rate. The incorporation of dielectric SEIs having a large permittivity also significantly enhanced the high rate capability. A series of experimental results indicated the activated Li transfer pathway is located near the triple phase junction; the dielectric-active material-electrolyte interface. In addition, utilizing the temperature dependence of the dielectric constant effectively strengthened the low-temperature power density of the LIB.

  • 1 Faculty of Engineering, Okayama University
OYO BUTURI Vol.88 No.7 p.452 (2019)