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High‐rate metal‐free MXene microsupercapacitors on paper substrates.

Authors :
Xue, Han
Huang, Po‐Han
Lai, Lee‐Lun
Su, Yingchun
Strömberg, Axel
Cao, Gaolong
Fan, Yuzhu
Khartsev, Sergiy
Göthelid, Mats
Sun, Yan‐Ting
Weissenrieder, Jonas
Gylfason, Kristinn B.
Niklaus, Frank
Li, Jiantong
Source :
Carbon Energy; May2024, Vol. 6 Issue 5, p1-11, 11p
Publication Year :
2024

Abstract

MXene is a promising energy storage material for miniaturized microbatteries and microsupercapacitors (MSCs). Despite its superior electrochemical performance, only a few studies have reported MXene‐based ultrahigh‐rate (>1000 mV s−1) on‐paper MSCs, mainly due to the reduced electrical conductance of MXene films deposited on paper. Herein, ultrahigh‐rate metal‐free on‐paper MSCs based on heterogeneous MXene/poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) (PEDOT:PSS)‐stack electrodes are fabricated through the combination of direct ink writing and femtosecond laser scribing. With a footprint area of only 20 mm2, the on‐paper MSCs exhibit excellent high‐rate capacitive behavior with an areal capacitance of 5.7 mF cm−2 and long cycle life (>95% capacitance retention after 10,000 cycles) at a high scan rate of 1000 mV s−1, outperforming most of the present on‐paper MSCs. Furthermore, the heterogeneous MXene/PEDOT:PSS electrodes can interconnect individual MSCs into metal‐free on‐paper MSC arrays, which can also be simultaneously charged/discharged at 1000 mV s−1, showing scalable capacitive performance. The heterogeneous MXene/PEDOT:PSS stacks are a promising electrode structure for on‐paper MSCs to serve as ultrafast miniaturized energy storage components for emerging paper electronics. [ABSTRACT FROM AUTHOR]

Details

Language :
English
Volume :
6
Issue :
5
Database :
Complementary Index
Journal :
Carbon Energy
Publication Type :
Academic Journal
Accession number :
177532504
Full Text :
https://doi.org/10.1002/cey2.442