Improving the Performance at Elevated Temperature of High Voltage Graphite/LiNi0.5Mn1.5O4 Cells with Added Lithium Catechol Dimethyl Borate [electronic resource].
- Washington, D.C. : United States. Dept. of Energy. Office of Basic Energy Sciences, 2016. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- pages A128-A136 : digital, PDF file
- Additional Creators:
- Brown University, United States. Department of Energy. Office of Basic Energy Sciences, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- 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.
- Published through SciTech Connect., 12/13/2016., Journal of the Electrochemical Society 164 2 ISSN 0013-4651 AM, and Yingnan Dong; Julien Demeaux; Yuzi Zhang; Mengqing Xu; Liu Zhou; Alex D. MacIntosh; Brett L. Lucht.
- Funding Information:
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