Reduction of charge-transfer resistance at the solid electrolyte - Electrode interface by pulsed laser deposition of films from a crystalline Li2PO2N source

William C. West, Zachary D. Hood, Shiba P. Adhikari, Chengdu Liang, Abdou Lachgar, Munekazu Motoyama, Yasutoshi Iriyama

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)

Abstract

Amorphous films deposited by pulsed laser deposition from a crystalline Li2PO2N target in a N2 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 LiMn1.485Ni0.45Cr0.05O4 (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-cm2 compared to 760 and 960 Ω-cm2 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 Li3PO4 in a N2 atmosphere, the LiPON-PLD films were composed of a higher amount of triply coordinated P-N<PP with relatively lower contributions of P-N=P.

Original languageEnglish
Pages (from-to)116-122
Number of pages7
JournalJournal of Power Sources
Volume312
DOIs
Publication statusPublished - Apr 30 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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