Thermal Stability and Electrochemical Properties of Fluorine Compounds as Nonflammable Solvents for Lithium-Ion Batteries
- 1 January 2010
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 157 (6), A707-A712
- https://doi.org/10.1149/1.3377084
Abstract
Differential scanning calorimetry study demonstrated that mixing of fluoro-ethers and fluoro-carbonates improved the thermal stability of 0.67 mol/L LiClO4LiClO4 –ethylene carbonate (EC)/diethyl carbonate (DEC)/propylene carbonate (PC) (1:1:1 by volume). The oxidation currents were smaller in the fluorine compound-mixed electrolyte solutions than in 0.67 mol/L LiClO4LiClO4 –EC/DEC/PC, which also shows a high stability of the fluorine compound-mixed electrolyte solutions against electrochemical oxidation. Electrochemical reduction of fluorine compounds took place at the higher potentials than EC, DEC, and PC, as suggested by the highest occupied molecular orbital and lowest unoccupied p-molecular orbital energies of the fluorine compounds. However, charge/discharge experiments using natural graphite (NG) electrodes showed that the fluorine compounds increased first coulombic efficiencies due to the quick formation of the solid electrolyte interphase on NG in PC-containing solvents.Keywords
This publication has 38 references indexed in Scilit:
- Cresyl diphenyl phosphate as flame retardant additive for lithium-ion batteriesJournal of Power Sources, 2008
- Electrochemical performance of lithium-ion batteries with triphenylphosphate as a flame-retardant additiveJournal of Power Sources, 2007
- Electrochemical Performance of Li-Ion Batteries Containing Biphenyl, Vinyl Ethylene Carbonate in Liquid ElectrolyteJournal of the Electrochemical Society, 2007
- High-Concentration Trimethyl Phosphate-Based Nonflammable Electrolytes with Improved Charge–Discharge Performance of a Graphite Anode for Lithium-Ion CellsJournal of the Electrochemical Society, 2006
- Comparative study of trimethyl phosphite and trimethyl phosphate as electrolyte additives in lithium ion batteriesJournal of Power Sources, 2005
- Flame-retardant additives for lithium-ion batteriesJournal of Power Sources, 2003
- An Attempt to Formulate Nonflammable Lithium Ion Electrolytes with Alkyl Phosphates and PhosphazenesJournal of the Electrochemical Society, 2002
- Nonflammable Electrolytes for Li-Ion Batteries Based on a Fluorinated PhosphateJournal of the Electrochemical Society, 2002
- Nonflammable Trimethyl Phosphate Solvent-Containing Electrolytes for Lithium-Ion Batteries: II. The Use of an Amorphous Carbon AnodeJournal of the Electrochemical Society, 2001
- Nonflammable Trimethyl Phosphate Solvent-Containing Electrolytes for Lithium-Ion Batteries: I. Fundamental PropertiesJournal of the Electrochemical Society, 2001