TY - JOUR
T1 - Wide Electrochemical Stability Window of NaClO4 Water-in-Salt Electrolyte Elevates the Supercapacitive Performance of Poly(3,4-ethylenedioxythiophene)
AU - Jha, Plawan Kumar
AU - Kochrekar, Sachin
AU - Jadhav, Ashwini
AU - Lassfolk, Robert
AU - Salomäki, Mikko
AU - Mäkilä, Ermei
AU - Kvarnström, Carita
PY - 2024/9
Y1 - 2024/9
N2 - Water-in-salt electrolytes (WiSEs) have emerged as the primary preference in the domain of aqueous-based supercapacitors, thanks to their wide electrochemical stability window (ESW > 1.23 V). Here, we have chemically synthesized a unique lettuce coral-like structure of tosylate doped-poly(3,4-ethylenedioxythiophene) (PEDOT-tos) and tested it for supercapacitor application in a 17 molal (m) NaClO
4 WiSE, achieving an ESW of 1.9 V. The energy and power densities (E
d and P
d) of our PEDOT-tos supercapacitor are as high as 14 Wh kg
-1 and 7210 W kg
-1, respectively, with over 80 % capacitance retention after 10,000 continuous Galvanostatic charge-discharge cycles. The NaClO
4 WiSE increases the E
d and P
d of PEDOT by several folds compared to traditional H
2SO
4 electrolyte. This work encourages the exploration of a suitable combination of a PEDOT-based composite material and WiSE for high-performance supercapacitors.
AB - Water-in-salt electrolytes (WiSEs) have emerged as the primary preference in the domain of aqueous-based supercapacitors, thanks to their wide electrochemical stability window (ESW > 1.23 V). Here, we have chemically synthesized a unique lettuce coral-like structure of tosylate doped-poly(3,4-ethylenedioxythiophene) (PEDOT-tos) and tested it for supercapacitor application in a 17 molal (m) NaClO
4 WiSE, achieving an ESW of 1.9 V. The energy and power densities (E
d and P
d) of our PEDOT-tos supercapacitor are as high as 14 Wh kg
-1 and 7210 W kg
-1, respectively, with over 80 % capacitance retention after 10,000 continuous Galvanostatic charge-discharge cycles. The NaClO
4 WiSE increases the E
d and P
d of PEDOT by several folds compared to traditional H
2SO
4 electrolyte. This work encourages the exploration of a suitable combination of a PEDOT-based composite material and WiSE for high-performance supercapacitors.
U2 - 10.1016/j.ensm.2024.103758
DO - 10.1016/j.ensm.2024.103758
M3 - Article
SN - 2405-8297
VL - 72
SP - 103758
JO - Energy Storage Materials
JF - Energy Storage Materials
M1 - 103758
ER -