Wide Electrochemical Stability Window of NaClO4 Water-in-Salt Electrolyte Elevates the Supercapacitive Performance of Poly(3,4-ethylenedioxythiophene)

Plawan Kumar Jha; Sachin Kochrekar; Ashwini Jadhav; Robert Lassfolk; Mikko Salomäki; Ermei Mäkilä; Carita Kvarnström

doi:10.1016/j.ensm.2024.103758

Wide Electrochemical Stability Window of NaClO4 Water-in-Salt Electrolyte Elevates the Supercapacitive Performance of Poly(3,4-ethylenedioxythiophene)

Plawan Kumar Jha^*
, Sachin Kochrekar
, Ashwini Jadhav
, Robert Lassfolk
, Mikko Salomäki
, Ermei Mäkilä
, Carita Kvarnström^*

^*Corresponding author for this work

Laboratory of Molecular Science and Engineering

Research output: Contribution to journal › Article › Scientific › peer-review

13 Citations (Scopus)

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Abstract

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.

Original language	English
Article number	103758
Pages (from-to)	103758
Journal	Energy Storage Materials
Volume	72
DOIs	https://doi.org/10.1016/j.ensm.2024.103758
Publication status	Published - Sept 2024
MoE publication type	A1 Journal article-refereed

Funding

P.K.J. S.K. and A.J. acknowledge the Real Estate Foundation, Finland, and Business Finland (COMPOL project) for their financial support. P.K.J. and R.L. are grateful to the Turku Center for Chemical and Molecular Analytics (CCMA) for providing the NMR facility. P.K.J. thanks Pooja Sindhu from IISER Pune for the TEM images. P.K.J. thanks Pia Damlin from university of Turku for the technical help.

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10.1016/j.ensm.2024.103758Licence: CC BY-NC-ND

1-s2.0-S2405829724005841-mainFinal published version, 6.54 MBLicence: CC BY-NC-ND

https://urn.fi/URN:NBN:fi-fe2024111391241

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@article{408e0f1a1632490e9dbf8e92b4b94eae,

title = "Wide Electrochemical Stability Window of NaClO4 Water-in-Salt Electrolyte Elevates the Supercapacitive Performance of Poly(3,4-ethylenedioxythiophene)",

abstract = "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.",

author = "Jha, \{Plawan Kumar\} and Sachin Kochrekar and Ashwini Jadhav and Robert Lassfolk and Mikko Salom{\"a}ki and Ermei M{\"a}kil{\"a} and Carita Kvarnstr{\"o}m",

year = "2024",

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doi = "10.1016/j.ensm.2024.103758",

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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 -

Wide Electrochemical Stability Window of NaClO4 Water-in-Salt Electrolyte Elevates the Supercapacitive Performance of Poly(3,4-ethylenedioxythiophene)

Abstract

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