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Title: Improving the Performance at Elevated Temperature of High Voltage Graphite/LiNi 0.5Mn 1.5O 4 Cells with Added Lithium Catechol Dimethyl Borate

Performance of LiNi 0.5Mn 1.5O 4/graphite cells cycled to 4.8 V at 55°C with the 1.2 M LiPF 6 in EC/EMC (3/7, STD electrolyte) with and without added lithium catechol dimethyl borate (LiCDMB) has been investigated. The incorporation of 0.5 wt% LiCDMB to the STD electrolyte results in an improved capacity retention and coulombic efficiency upon cycling at 55°C. Ex-situ analysis of the electrode surfaces via a combination of SEM, TEM, and XPS reveals that oxidation of LiCDMB at high potential results in the deposition of a passivation layer on the electrode surface, preventing transition metal ion dissolution from the cathode and subsequent deposition on the anode. NMR investigations of the bulk electrolyte stored at 85°C reveals that added LiCDMB prevents the thermal decomposition of LiPF 6.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Univ. of Rhode Island, Kingston, RI (United States). Dept. of Chemistry
Publication Date:
Grant/Contract Number:
SC0007074
Type:
Accepted Manuscript
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 164; Journal Issue: 2; Journal ID: ISSN 0013-4651
Publisher:
The Electrochemical Society
Research Org:
Brown Univ., Providence, RI (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Electrolyte; High Voltage; Lithium Ion Battery; surface film
OSTI Identifier:
1425633

Dong, Yingnan, Demeaux, Julien, Zhang, Yuzi, Xu, Mengqing, Zhou, Liu, MacIntosh, Alex D., and Lucht, Brett L.. Improving the Performance at Elevated Temperature of High Voltage Graphite/LiNi0.5Mn1.5O4 Cells with Added Lithium Catechol Dimethyl Borate. United States: N. p., Web. doi:10.1149/2.0331702jes.
Dong, Yingnan, Demeaux, Julien, Zhang, Yuzi, Xu, Mengqing, Zhou, Liu, MacIntosh, Alex D., & Lucht, Brett L.. Improving the Performance at Elevated Temperature of High Voltage Graphite/LiNi0.5Mn1.5O4 Cells with Added Lithium Catechol Dimethyl Borate. United States. doi:10.1149/2.0331702jes.
Dong, Yingnan, Demeaux, Julien, Zhang, Yuzi, Xu, Mengqing, Zhou, Liu, MacIntosh, Alex D., and Lucht, Brett L.. 2016. "Improving the Performance at Elevated Temperature of High Voltage Graphite/LiNi0.5Mn1.5O4 Cells with Added Lithium Catechol Dimethyl Borate". United States. doi:10.1149/2.0331702jes. https://www.osti.gov/servlets/purl/1425633.
@article{osti_1425633,
title = {Improving the Performance at Elevated Temperature of High Voltage Graphite/LiNi0.5Mn1.5O4 Cells with Added Lithium Catechol Dimethyl Borate},
author = {Dong, Yingnan and Demeaux, Julien and Zhang, Yuzi and Xu, Mengqing and Zhou, Liu and MacIntosh, Alex D. and Lucht, Brett L.},
abstractNote = {Performance of LiNi0.5Mn1.5O4/graphite cells cycled to 4.8 V at 55°C with the 1.2 M LiPF6 in EC/EMC (3/7, STD electrolyte) with and without added lithium catechol dimethyl borate (LiCDMB) has been investigated. The incorporation of 0.5 wt% LiCDMB to the STD electrolyte results in an improved capacity retention and coulombic efficiency upon cycling at 55°C. Ex-situ analysis of the electrode surfaces via a combination of SEM, TEM, and XPS reveals that oxidation of LiCDMB at high potential results in the deposition of a passivation layer on the electrode surface, preventing transition metal ion dissolution from the cathode and subsequent deposition on the anode. NMR investigations of the bulk electrolyte stored at 85°C reveals that added LiCDMB prevents the thermal decomposition of LiPF6.},
doi = {10.1149/2.0331702jes},
journal = {Journal of the Electrochemical Society},
number = 2,
volume = 164,
place = {United States},
year = {2016},
month = {12}
}

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