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

ABSTRACT: 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.

SUBMITTER: Abouzari-Lotf E

PROVIDER: S-EPMC8251709 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature

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

Abouzari-Lotf Ebrahim E Azmi Raheleh R Li Zhenyou Z Shakouri Shirin S Chen Zhi Z Zhao-Karger Zhirong Z Klyatskaya Svetlana S Maibach Julia J Ruben Mario M Fichtner Maximilian M

ChemSusChem 20210316 8

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<sup>-1</sup> at the high current density of 1000 ...[more]

PMID: 33646642

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