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Elucidating Metal and Ligand Redox Activities of Copper-Benzoquinoid Coordination Polymer as Cathode for Lithium-Ion Batteries

Abstract

A novel redox-active quinone-based organic building block 1,4-dicyano-2,3,5,6-tetrahydroxybenzene (LH4) has been synthesized, and used as a bridging ligand to form a new 1D copper-benzoquinoid coordination polymer [CuL(DMF)2]n. The compound is able to deliver an initial capacity as high as 240 mA h g–1 at 20 mA g–1 (~C/3) when used as cathode in Li batteries. Ex situ XPS and FT-IR reveal the involvement of both Cu and the organic moieties in the multi-electron redox reaction. Cu K-edge XANES and EXAFS measurements confirm the change in the oxidation state and coordination environment of Cu during discharge-charge process. In situ generated metallic nanoparticles have been observed by TEM. The obtained mechanistic understanding of the metal-organic electrode materials for Li-based batteries may pave the way for the design of next-generation energy-storage systems.

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Publication details

The article was received on 17 May 2019, accepted on 02 Aug 2019 and first published on 09 Aug 2019


Article type: Communication
DOI: 10.1039/C9TA05244E
J. Mater. Chem. A, 2019, Accepted Manuscript

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    Elucidating Metal and Ligand Redox Activities of Copper-Benzoquinoid Coordination Polymer as Cathode for Lithium-Ion Batteries

    C. Chang, A. Li, I. Popovs, W. Kaveevivitchai, J. Chen, K. Chou, T. Kuo and T. Chen, J. Mater. Chem. A, 2019, Accepted Manuscript , DOI: 10.1039/C9TA05244E

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