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

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Energy Materials Lab

Research Interests

Rechargeable lithium battery, electrolytes for next generation Mg and Na battery

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

Cited 25 times in thomson ci

Cited 18 times in thomson ci

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

Keywords: Anode surfaces; Capacity fading; Capacity loss; Discharge capacities; Ex situ; Fluoroethylene; Solid electrolyte interphase; Spectrometry measurements; Spinel-type; Vinylene carbonates

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.