In:
Angewandte Chemie, Wiley, Vol. 133, No. 50 ( 2021-12-06), p. 26450-26457
Abstract:
The development of high‐performance anode materials for potassium‐based energy storage devices with long‐term cyclability requires combined innovations from rational material design to electrolyte optimization. A three‐dimensional K + ‐pre‐intercalated Ti 3 C 2 T x MXene with enlarged interlayer distance was constructed for efficient electrochemical potassium‐ion storage. We found that the optimized solvation structure of the concentrated ether‐based electrolyte leads to the formation of a thin and inorganic‐rich solid electrolyte interphase (SEI) on the K + ‐pre‐intercalated Ti 3 C 2 T x electrode, which is beneficial for interfacial stability and reaction kinetics. As a proof of concept, 3D K + ‐Ti 3 C 2 T x //activated carbon (AC) potassium‐ion hybrid capacitors (PIHCs) were assembled, which exhibited promising electrochemical performances. These results highlight the significant roles of both rational structure design and electrolyte optimization for highly reactive MXene‐based anode materials in energy storage devices.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v133.50
DOI:
10.1002/ange.202112090
Language:
English
Publisher:
Wiley
Publication Date:
2021
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