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Title: Improving the Performance at Elevated Temperature of High Voltage Graphite/LiNi0.5Mn1.5O4 Cells with Added Lithium Catechol Dimethyl Borate

Journal Article · · Journal of the Electrochemical Society
DOI:https://doi.org/10.1149/2.0331702jes· OSTI ID:1425633
 [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Univ. of Rhode Island, Kingston, RI (United States). Dept. of Chemistry
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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.

Research Organization:
Brown Univ., Providence, RI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0007074
OSTI ID:
1425633
Journal Information:
Journal of the Electrochemical Society, Vol. 164, Issue 2; ISSN 0013-4651
Publisher:
The Electrochemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

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Cited By (5)

Recent progress on lithium-ion batteries with high electrochemical performance journal February 2019
Improving the Cycling Performance of High-Voltage NMC111 || Graphite Lithium Ion Cells By an Effective Urea-Based Electrolyte Additive journal January 2019
The Investigation of Electrolyte Oxidation and Film Deposition Characteristics at High Potentials in a Carbonate-Based Electrolyte Using Pt Electrode journal January 2018
Electrochemical Characterization and Solid Electrolyte Interface Modeling of LiNi 0.5 Mn 1.5 O 4 -Graphite Cells journal January 2019
Improving the Performance of Graphite/LiNi 0.5 Mn 1.5 O 4 Cells with Added N,N-dimethylformamide Sulfur Trioxide Complex journal January 2017

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Related Subjects

25 ENERGY STORAGE
Electrolyte
High Voltage
Lithium Ion Battery
surface film