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- W2044283675 abstract "The electrochemical characteristics of 1 M NaPF6, NaClO4 and NaN(SO2F)2 (i.e., NaFSI) solutions in a quaternary solvent mixture of ethylene carbonate, dimethyl carbonate, propylene carbonate and ethyl acetate, in a 1:1:1:0.5 ratio by volume, were studied for application as electrolytes of supercapacitors working in a wide temperature range (from –40 to 60 °C). Mainly microporous carbide derived carbon powder (synthesized from Mo2C by chlorination at 800 °C) based electrodes exhibited nearly ideal capacitive behaviour at cell potentials up to 3.4 V in the NaPF6 electrolyte, where also the limiting capacitance of 120 F g−1 was practically retained down to –30 °C. The slower electrolyte ions diffusion processes at low temperature caused smaller capacitance and inferior power performance for the NaClO4 electrolyte based systems even at room-temperature. Cycle life measurements under floating potential conditions showed that the NaPF6 electrolyte has much better electrochemical stability at 3.0 V floating compared to NaClO4. Electrochemical stability problems observed with the NaFSI electrolyte due to oxidation of aluminium current collectors were not overcome by the addition of small concentration of aluminium-stabilizing NaPF6 salt." @default.
- W2044283675 created "2016-06-24" @default.
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- W2044283675 date "2014-03-01" @default.
- W2044283675 modified "2023-10-06" @default.
- W2044283675 title "Characteristics of non-aqueous quaternary solvent mixture and Na-salts based supercapacitor electrolytes in a wide temperature range" @default.
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- W2044283675 doi "https://doi.org/10.1016/j.electacta.2013.12.149" @default.
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