TY - JOUR
T1 - Reduction of charge-transfer resistance at the solid electrolyte - Electrode interface by pulsed laser deposition of films from a crystalline Li2PO2N source
AU - West, William C.
AU - Hood, Zachary D.
AU - Adhikari, Shiba P.
AU - Liang, Chengdu
AU - Lachgar, Abdou
AU - Motoyama, Munekazu
AU - Iriyama, Yasutoshi
N1 - Funding Information:
WCW gratefully acknowledges the financial support from Toyota Motor Company . A portion of this research was completed at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility. ZDH gratefully acknowledges support from Higher Education Research Experiences (HERE) at Oak Ridge National Laboratory and from the National Science Foundation Graduate Research Fellowship under Grant No. DGE-1148903 . Financial support from the Wake Forest University Center for Energy, Environment, and Sustainability is also acknowledged. The authors thank Dr. Takuya Masuda at National Institute for Materials Science (Japan) for assistance with the XPS measurements, Dr. Hisashi Sakai at Aichi Synchrotron Radiation Center for assistance with the S-XRD measurements, and Dr. Keerthi Senevirathne at Florida A&M University and Dr. Natalie Holzwarth at Wake Forest University for helpful discussions.
Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.
PY - 2016/4/30
Y1 - 2016/4/30
N2 - 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.
AB - 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.
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U2 - 10.1016/j.jpowsour.2016.02.034
DO - 10.1016/j.jpowsour.2016.02.034
M3 - Article
AN - SCOPUS:84964318621
SN - 0378-7753
VL - 312
SP - 116
EP - 122
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -
