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A Self-Conditioned Metalloporphyrin as a Highly Stable Cathode for Fast Rechargeable Magnesium Batteries

Abouzari-Lotf, Ebrahim; Azmi, Raheleh; Li, Zhenyou; Shakouri, Shirin; Chen, Zhi; Zhao-Karger, Zhirong; Klyatskaya, Svetlana; Maibach, Julia; Ruben, Mario; Fichtner, Maximilian

Development of practical rechargeable Mg batteries (RMBs) is impeded by their limited cycle life and rate performance of cathodes. As demonstrated herein, a copper‐porphyrin with meso‐functionalized ethynyl groups is capable of reversible two‐ and four‐electron storage at an extremely fast rate (tested up to 53 C). The reversible four‐electron redox process with cationic‐anionic contributions resulted in a specific discharge capacity of 155 mAh g$^{-1}$ at the high current density of 1000 mA g$^{-1}$. Even at 4000 mA g$^{-1}$, it still delivered >70 mAh g$^{-1}$ after 500 cycles, corresponding to an energy density of >92 Wh kg$^{-1}$ at a high power of >5100 W kg$^{-1}$. The ability to provide such high‐rate performance and long‐life opens the way to the development of practical cathodes for multivalent metal batteries.

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Verlagsausgabe §
DOI: 10.5445/IR/1000130925
Veröffentlicht am 25.03.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Post Lithium Storage (POLiS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1864-5631, 1864-564X
KITopen-ID: 1000130925
Erschienen in ChemSusChem
Verlag Wiley-VCH Verlag
Band 14
Seiten 1-8
Vorab online veröffentlicht am 01.03.2021
Schlagwörter electrode materials; magnesium batteries; multi-electron redox reactions; porphyrins; transmetalation
Nachgewiesen in Scopus
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