Temperature stability of symmetric activated carbon supercapacitors assembled with in situ electrodeposited poly(vinyl alcohol) potassium borate hydrogel electrolyte

Temperature stability of symmetric activated carbon (AC) supercapacitors (SCs) assembled with in situ electrodeposited poly(vinyl alcohol) potassium borate hydrogel electrolyte was systematically studied and compared with that of AC SCs assembled with liquid aqueous electrolytes in the temperature range from −5 °C to 80 °C.