In:
Angewandte Chemie International Edition, Wiley, Vol. 60, No. 48 ( 2021-11-22), p. 25318-25322
Kurzfassung:
MXenes have attracted great interests as supercapacitors due to their metallic conductivity, high density, and hydrophilic nature. Herein we report Ti 3 C 2 ‐Cu/Co hybrids via molten salt etching in which the existence of metal atoms and their interactions with MXene via surficial O atoms were elucidated by XAFS for the first time. The electrochemical investigation of Ti 3 C 2 ‐Cu electrode demonstrated the pseudocapacitive contribution of Cu and a splendid specific capacitance of 885.0 F g −1 at 0.5 A g −1 in 1.0 M H 2 SO 4 . Symmetric supercapacitor Ti 3 C 2 ‐Cu//Ti 3 C 2 ‐Cu was demonstrated with operating voltage of 1.6 V, areal capacitance of 290.5 mF cm −2 at 1 mA cm −2 , and stability over 10 000 cycles. It delivered an areal energy density of 103.3 μWh cm −2 at power density of 0.8 mW cm −2 , based on which a supercapacitor pouch was fabricated. It provides deeper insights into the molten salt mechanism and strategies for designing MXene‐based materials for electrochemical energy storage.
Materialart:
Online-Ressource
ISSN:
1433-7851
,
1521-3773
DOI:
10.1002/anie.202112381
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2021
ZDB Id:
2011836-3
ZDB Id:
123227-7