Wide-temperature range operation supercapacitors from nanostructured activated carbon fabric

摘要: Abstract Electrochemical power sources that offer high energy and densities and, can also withstand a harsh temperature range have become extremely desirable in applications ranging from civilian portable electronic devices to military weapons. In this report, we demonstrated wide withstanding supercapacitor which be operated 100 °C −40 °C within voltage window −2 V 2 V. The performance of the coin cells, assembled with nanostructured activated carbon fabric (ACF) as electrode material 1 M tetraethylammonium tetrafluoroborate (TEABF 4 ) polypropylene carbonate (PC) solution electrolyte, was systematically studied set window. ACF yielded ideal rectangular shapes cyclic voltammograms 0–100 °C an average mass capacitance 90 F g −1 60 F g at −25 °C. still over 20 F g low −40 °C. Another exciting feature supercapacitors they resumed their room when cooled defrosted −40 °C, demonstrating excellent repeatability stability. charge–discharge behavior showed long-cycle stability extreme temperatures. These electrochemical performances make type very promising many practical applications.