TY - JOUR
T1 - Ethylene carbonate (EC)-propyl acetate (PA) based electrolyte for low temperature performance of li-ion rechargeable batteries
AU - Nagano, Hiroki
AU - Kim, Hackho
AU - Ikeda, Suguru
AU - Miyoshi, Seiji
AU - Watanabe, Motonori
AU - Ishihara, Tatsumi
PY - 2021
Y1 - 2021
N2 - Charge-discharge performance at -30°C was studied using low-viscosity ester solvents (propyl acetate (PA), propyl propionate (PP), and ethyl propionate (EP)) as electrolyte for improving the low-temperature performance of li-ion rechargeable batteries. Among the studied ester, PA based electrolyte showed the most superior cycle stability. EC-PA based electrolyte increased the discharge capacity of the cell at -30°C by 6% compared to the EC-DEC based electrolyte. Although the cell capacity at low temperature was increased, favorable solid electrolyte interface (SEI) may not be formed and the cycle stability was decreased in the cell using PA component as the electrolyte. Using an electrolyte additive for SEI formation in combination with PA based electrolyte, the low temperature discharge capacity and cycle stability were much increased which was strongly demanded for electric vehicle application.
AB - Charge-discharge performance at -30°C was studied using low-viscosity ester solvents (propyl acetate (PA), propyl propionate (PP), and ethyl propionate (EP)) as electrolyte for improving the low-temperature performance of li-ion rechargeable batteries. Among the studied ester, PA based electrolyte showed the most superior cycle stability. EC-PA based electrolyte increased the discharge capacity of the cell at -30°C by 6% compared to the EC-DEC based electrolyte. Although the cell capacity at low temperature was increased, favorable solid electrolyte interface (SEI) may not be formed and the cycle stability was decreased in the cell using PA component as the electrolyte. Using an electrolyte additive for SEI formation in combination with PA based electrolyte, the low temperature discharge capacity and cycle stability were much increased which was strongly demanded for electric vehicle application.
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U2 - 10.1246/bcsj.20210185
DO - 10.1246/bcsj.20210185
M3 - Article
AN - SCOPUS:85118202705
SN - 0009-2673
VL - 94
SP - 2202
EP - 2209
JO - Bulletin of the Chemical Society of Japan
JF - Bulletin of the Chemical Society of Japan
IS - 9
ER -