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Issue 12, 2010
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Evaluation of polyketones with N-cyclic structure as electrode material for electrochemical energy storage: case of tetraketopiperazine unit

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Abstract

Pursuing the electrochemical evaluation vs. Li of carbonyl-based cyclic structures deriving from the oxocarbon family, polyketones with N-cyclic structure are investigated to probe the potential modifications. In this communication, we specifically report on the electrochemical investigation of our first selected family of heterocycles based on the 2,3,5,6-tetraketopiperazine unit. Working in a systematic way, a series of tetraketopiperazine molecules with quite different R groups as substituents (i.e., phenyl, allyl and propyl functions) have been synthesized and characterized. Such small molecules were found to rapidly solubilise in commonly used electrolytes. To bypass this issue, we have prepared an oligomeric form via acyclic diene metathesis (ADMET). Preliminary results on the poly-N,N′-diallyl-2,3,5,6-tetraketopiperazine oligomer show a sustained reversible capacity of 110 mAh g−1 at near 2.45 V. The insight gained from this work is the fact that two intracyclic nitrogen atoms or a lithiated enediolate functionality in the C6-based polyketone cyclic structure induces a similar tuning of the redox potential.

Graphical abstract: Evaluation of polyketones with N-cyclic structure as electrode material for electrochemical energy storage: case of tetraketopiperazine unit

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Publication details

The article was received on 01 Jun 2010, accepted on 29 Sep 2010 and first published on 10 Nov 2010


Article type: Communication
DOI: 10.1039/C0EE00126K
Citation: Energy Environ. Sci., 2010,3, 1929-1933
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    Evaluation of polyketones with N-cyclic structure as electrode material for electrochemical energy storage: case of tetraketopiperazine unit

    J. Geng, J. Bonnet, S. Renault, F. Dolhem and P. Poizot, Energy Environ. Sci., 2010, 3, 1929
    DOI: 10.1039/C0EE00126K

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