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Concentrated Electrolytes Enabling Stable Aqueous Ammonium‐Ion Batteries

Han, Jin 1; Zarrabeitia, Maider ORCID iD icon 1; Mariani, Alessandro 1; Kuenzel, Matthias 1; Mullaliu, Angelo 1; Varzi, Alberto ORCID iD icon 1; Passerini, Stefano 1
1 Helmholtz-Institut Ulm (HIU), Karlsruher Institut für Technologie (KIT)

Abstract:

Rechargeable aqueous batteries are promising devices for large-scale energy-storage applications because of their low-cost, inherent safety, and environmental friendliness. Among them, aqueous ammonium-ion (NH$_4$$^+$) batteries (AAIB) are currently emerging owing to the fast diffusion kinetics of NH$_4$$^+$. Nevertheless, it is still a challenge to obtain stable AAIB with relatively high output potential, considering the instability of many electrode materials in an aqueous environment. Herein, a cell based on a concentrated (5.8 m) aqueous (NH$_4$)$_2$SO$_4$ electrolyte, ammonium copper hexacyanoferrate (N-CuHCF) as the positive electrode (cathode), and 3,4,9,10-perylene-bis(dicarboximide) (PTCDI) as the negative electrode (anode) is reported. The solvation structure, electrochemical properties, as well as the electrode–electrolyte interface and interphase are systematically investigated by the combination of theoretical and experimental methods. The results indicate a remarkable cycling performance of the low-cost rocking-chair AAIB, which offers a capacity retention of ≈72% after 1000 cycles and an average output potential of ≈1.0 V.


Verlagsausgabe §
DOI: 10.5445/IR/1000149074
Veröffentlicht am 27.07.2022
Originalveröffentlichung
DOI: 10.1002/adma.202201877
Scopus
Zitationen: 53
Web of Science
Zitationen: 63
Dimensions
Zitationen: 61
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 0935-9648, 1521-4095
KITopen-ID: 1000149074
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Erschienen in Advanced Materials
Verlag John Wiley and Sons
Band 34
Heft 32
Seiten Art.-Nr.: 2201877
Vorab online veröffentlicht am 08.07.2022
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Web of Science
Scopus
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