Achieving High-Performance 3D K+ -Pre-intercalated Ti3 C2 Tx MXene for Potassium-Ion Hybrid Capacitors via Regulating Electrolyte Solvation Structure.
- Publisher:
- Wiley
- Publication Type:
- Journal Article
- Citation:
- Angew Chem Int Ed Engl, 2021, 60, (50), pp. 26246-26253
- Issue Date:
- 2021-12-06
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| Filename | Description | Size | |||
|---|---|---|---|---|---|
| Angewandte Chemie Intl Edit - 2021 - Zhao - Achieving High‐Performance 3D K ‐Pre‐intercalated Ti3C2Tx MXene for.pdf | Published Version | 2.35 MB |
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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 Ti3 C2 Tx 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 Ti3 C2 Tx electrode, which is beneficial for interfacial stability and reaction kinetics. As a proof of concept, 3D K+ -Ti3 C2 Tx //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.
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