TY - JOUR
T1 - Effect of fluoroethylene carbonate and vinylene carbonate additives on full-cell optimization of Li-ion capacitors
AU - Ahn, Seongki
AU - Fukushima, Minori
AU - Nara, Hiroki
AU - Momma, Toshiyuki
AU - Sugimoto, Wataru
AU - Osaka, Tetsuya
N1 - Funding Information:
This work was partially supported by the Advanced Low Carbon Technology Research and Development Program of the Japan Science and Technology Agency (JST-ALCA, JPMJAL1008).
Publisher Copyright:
© 2020 The Author(s)
PY - 2021/1
Y1 - 2021/1
N2 - Lithium-ion capacitors (LICs) operate by two mechanisms, namely a double-layer mechanism based on a capacitor-like positive electrode and the intercalation mechanism of a battery-like negative electrode. Hence, well-designed reaction kinetics between the positive electrode and negative electrode are essential for optimizing LIC full-cell configurations. In this study, we investigated the influences of fluoroethylene carbonate (FEC) or vinylene carbonate (VC) as electrolyte additives on full-cell performance of LICs. We confirmed that the internal resistance of graphite increased with the use of FEC, which degraded the cyclability of the LIC full-cell. Conversely, LICs consisting of the VC additive had good cyclability over 4000 cycles owing to the solid electrolyte interphase (SEI) containing polymeric species. This detailed investigation into the function of SEI compounds derived from VC additives and their effect on cyclability will provide new insights into optimization of LIC full-cell configurations with appropriate electrolyte additives.
AB - Lithium-ion capacitors (LICs) operate by two mechanisms, namely a double-layer mechanism based on a capacitor-like positive electrode and the intercalation mechanism of a battery-like negative electrode. Hence, well-designed reaction kinetics between the positive electrode and negative electrode are essential for optimizing LIC full-cell configurations. In this study, we investigated the influences of fluoroethylene carbonate (FEC) or vinylene carbonate (VC) as electrolyte additives on full-cell performance of LICs. We confirmed that the internal resistance of graphite increased with the use of FEC, which degraded the cyclability of the LIC full-cell. Conversely, LICs consisting of the VC additive had good cyclability over 4000 cycles owing to the solid electrolyte interphase (SEI) containing polymeric species. This detailed investigation into the function of SEI compounds derived from VC additives and their effect on cyclability will provide new insights into optimization of LIC full-cell configurations with appropriate electrolyte additives.
KW - Electrolyte additive
KW - Fluoroethylene carbonate
KW - Full-cell optimization
KW - Lithium-ion capacitor
KW - Vinylene carbonate
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U2 - 10.1016/j.elecom.2020.106905
DO - 10.1016/j.elecom.2020.106905
M3 - Article
AN - SCOPUS:85098215135
SN - 1388-2481
VL - 122
JO - Electrochemistry Communications
JF - Electrochemistry Communications
M1 - 106905
ER -