TY - JOUR
T1 - The use of accelerating rate calorimetry (ARC) for the study of the thermal reactions of Li-ion battery electrolyte solutions
AU - Gnanaraj, J. S.
AU - Zinigrad, E.
AU - Asraf, L.
AU - Gottlieb, H. E.
AU - Sprecher, M.
AU - Aurbach, D.
AU - Schmidt, M.
PY - 2003/6/1
Y1 - 2003/6/1
N2 - The thermal stability of 1M LiPF6, LiClO4, LiN(SO2CF2CF3)2 (LiBETI) and LiPF3(CF2CF3)3 (LiFAP) solutions in mixtures of ethylene carbonate, diethyl carbonate and dimethyl carbonate in the temperature range 40-350°C was studied by ARC and DSC. NMR was used to analyze the reaction products at different reaction stages. The least thermally stable are LiClO4 solutions. LiPF3(CF2CF3)3 solutions showed higher thermal stability than LiPF6 solutions. The highest thermal stability was found for LiN(SO2CF2CF3)2 solutions. Studies by DSC and pressure measurements during ARC experiments with LiPF6 and LiFAP solutions detected an endothermic reaction, which occurs before a number of exothermic reactions as the temperature increases. Fluoride ions are formed and react with the alkyl carbonate molecules both as bases and as nucleophiles.
AB - The thermal stability of 1M LiPF6, LiClO4, LiN(SO2CF2CF3)2 (LiBETI) and LiPF3(CF2CF3)3 (LiFAP) solutions in mixtures of ethylene carbonate, diethyl carbonate and dimethyl carbonate in the temperature range 40-350°C was studied by ARC and DSC. NMR was used to analyze the reaction products at different reaction stages. The least thermally stable are LiClO4 solutions. LiPF3(CF2CF3)3 solutions showed higher thermal stability than LiPF6 solutions. The highest thermal stability was found for LiN(SO2CF2CF3)2 solutions. Studies by DSC and pressure measurements during ARC experiments with LiPF6 and LiFAP solutions detected an endothermic reaction, which occurs before a number of exothermic reactions as the temperature increases. Fluoride ions are formed and react with the alkyl carbonate molecules both as bases and as nucleophiles.
KW - Accelerating rate calorimetry (ARC)
KW - Alkyl carbonate solutions
KW - Differential scanning calorimetry (DSC)
KW - Thermal stability
UR - http://www.scopus.com/inward/record.url?scp=0038685950&partnerID=8YFLogxK
U2 - 10.1016/S0378-7753(03)00255-6
DO - 10.1016/S0378-7753(03)00255-6
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AN - SCOPUS:0038685950
SN - 0378-7753
VL - 119-121
SP - 794
EP - 798
JO - Journal of Power Sources
JF - Journal of Power Sources
T2 - Selected Papers Presented at the 11th IMLB
Y2 - 22 June 2002 through 28 June 2002
ER -
