Moon, Juyoung Lee, Juyun Kang, Yun Chan Kim, Jong Hak Park, Jung Tae Kim, Seon Joon 2024-01-19T08:32:15Z 2024-01-19T08:32:15Z 2023-09-21 2023-10 0013-4686 https://pubs.kist.re.kr/handle/201004/113216 Supercapacitors based on organohydrogel electrolytes can function at subzero temperatures and demonstrate a large potential range. However, for the development of next-generation energy-storage technologies, improvements in the ionic conductivity, mechanical strength, and flexibility of organohydrogel electrolytes are required. We employed Ti3C2Tx, an ionophilic MXene, as a nanofiller in this study to improve the ionic conductivity of organohydrogel electrolytes. Strong affinity for Li+ ions and good dispersibility in water/glycerol were obtained by the hydroxyl group's abundance on the surface of the ionophilic MXene. Due to the enhanced Li-ion hopping through the plentiful hydroxyl groups, an antifreezing supercapacitor based on the MXene/poly(vinyl alcohol) organohydrogel electrolyte (MXPVA-OHE) displayed a gravimetric capacitance as high as 19.84 F g-1 at room temperature and 3.49 F g-1 at -20 degrees C. Due to their high ionic conductivity, wide potential window, and favorable post-freezing recyclability, MXPVA-OHE-based supercapacitors are thus excellent energy-storage devices. English Pergamon Press Ltd. Designing ionophilic MXene-based organohydrogel electrolytes for high performance supercapacitor with wide-potential-window and anti-freezing properties Article 10.1016/j.electacta.2023.143007 1 Electrochimica Acta, v.466 Electrochimica Acta 466 Y scie scopus 001059730600001 2-s2.0-85168426816 Electrochemistry Electrochemistry Article POLYMER ELECTROLYTE ENERGY-CONVERSION GEL-ELECTROLYTE OXIDE NANOCOMPOSITES HYDROGELS CARBON ION Organohydrogel MXene Electrolyte Anti -freezing Wide -potential -window Ionic conductivity Supercapacitor