51. Reduction of charge-transfer resistance at the solid electrolyte – electrode interface by pulsed laser deposition of films from a crystalline Li2PO2N source.
- Author
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West, William C., Hood, Zachary D., Adhikari, Shiba P., Liang, Chengdu, Lachgar, Abdou, Motoyama, Munekazu, and Iriyama, Yasutoshi
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CHEMICAL reduction , *CHARGE transfer , *ELECTRIC resistance , *SOLID electrolytes , *ELECTRODES , *PULSED laser deposition , *CRYSTALLINE interfaces - Abstract
Amorphous films deposited by pulsed laser deposition from a crystalline Li 2 PO 2 N target in a N 2 ambient atmosphere (LiPON-PLD) have been examined as an approach to reduce the charge-transfer resistance at the electrode-solid electrolyte interface. Despite the relatively low ionic conductivity of ca. 1.5 × 10 −8 S cm −1 at 25 °C, the amorphous LiPON-PLD films deposited between a LiMn 1.485 Ni 0.45 Cr 0.05 O 4 (LNM) cathode and LiPON electrolyte resulted in sharply improved electrochemical performance in terms of charge-transfer resistance and CV profiles. Cells without a LiPON-PLD film had a charge-transfer resistance of 4470 Ω-cm 2 compared to 760 and 960 Ω-cm 2 for the sample with 17 nm and 31 nm thick LiPON-PLD films, respectively. The LiPON-PLD amorphous films show no evidence of the continuous planar P N P N- backbone characteristic of the crystalline target material, but compared with LiPON prepared from radio frequency magnetron sputtering with Li 3 PO 4 in a N 2 atmosphere, the LiPON-PLD films were composed of a higher amount of triply coordinated P − N < P P with relatively lower contributions of P N P. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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