Hydronium Intercalation Enables High Rate in Hexagonal Molybdate Single Crystals

Hydronium Intercalation Enables High Rate in Hexagonal Molybdate Single Crystals

© 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 36(2024), 6 vom: 28. Feb., Seite e2307118
1. Verfasser: Guo, Haocheng (VerfasserIn)
Weitere Verfasser: Wu, Sicheng, Chen, Wen, Su, Zhen, Wang, Qing, Sharma, Neeraj, Rong, Chengli, Fleischmann, Simon, Liu, Zhaoping, Zhao, Chuan
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article hexagonal molybdates hydronium intercalation operando XRD single-crystal electrode solid-state NMR
Beschreibung
Zusammenfassung:© 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.
Rapid proton transport in solid-hosts promotes a new chemistry in achieving high-rate Faradaic electrodes. Exploring the possibility of hydronium intercalation is essential for advancing proton-based charge storage. Nevertheless, this is yet to be revealed. Herein, a new host is reported of hexagonal molybdates, (A2 O)x ·MoO3 ·(H2 O)y (A = Na+ , NH4 + ), and hydronium (de)intercalation is demonstrated with experiments. Hexagonal molybdates show a battery-type initial reduction followed by intercalation pseudocapacitance. Fast rate of 200 C (40 A g-1 ) and long lifespan of 30 000 cycles are achieved in electrodes of monocrystals even over 200 µm. Solid-state nuclear magnetic resonance confirms hydronium intercalations, and operando measurements using electrochemical quartz crystal microbalance and synchrotron X-ray diffraction disclose distinct intercalation behaviours in different electrolyte concentrations. Remarkably, characterizations of the cycled electrodes show nearly identical structures and suggest equilibrium products are minimally influenced by the extent of proton solvation. These results offer new insights into proton electrochemistry and will advance correlated high-power batteries and beyond
Beschreibung:Date Revised 08.02.2024
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202307118