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Author

Choi, Nam-Soon
Energy Materials Lab
Research Interests
  • Rechargeable lithium battery, electrolytes for next generation Mg and Na battery

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Effect of SEI on Capacity Losses of Spinel Lithium Manganese Oxide/Graphite Batteries Stored at 60 degrees C

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Title
Effect of SEI on Capacity Losses of Spinel Lithium Manganese Oxide/Graphite Batteries Stored at 60 degrees C
Author
Cho, In HaengKim, Sung-SooShin, Soon CheolChoi, Nam-Soon
Keywords
Anode surfaces; Capacity fading; Capacity loss; Discharge capacities; Ex situ; Fluoroethylene; Solid electrolyte interphase; Spectrometry measurements; Spinel-type; Vinylene carbonates
Issue Date
2010
Publisher
ELECTROCHEMICAL SOC INC
Citation
ELECTROCHEMICAL AND SOLID STATE LETTERS, v.13, no.11, pp.A168 - A172
Abstract
The discharge capacities of spinet-type Li(1.1)Mn(1.9)O(4)/graphite cells charged in electrolytes with solid electrolyte interphase (SEI)-forming additives are investigated after being stored at 60 degrees C. The presence of Mn deposits on the anode surface, which is responsible for the capacity fading of cells, is clearly shown by means of open-circuit voltage, ex situ X-ray diffraction, and energy-dispersive spectrometry measurements. Unlike fluoroethylene carbonate, using vinylene carbonate as an SEI former leads to a noticeable improvement in the discharge capacity retention of cells that were stored for 20 days at 60 degrees C.
URI
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DOI
http://dx.doi.org/10.1149/1.3481711
ISSN
1099-0062
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