Benzo-dipteridine derivatives as organic cathodes for Li- and Na-ion batteries

Cariello, M. , Johnston, B., Bhosale, M., Amores Segura, M., Wilson, E., McCarron, L. J., Wilson, C. , Corr, S. A. and Cooke, G. (2020) Benzo-dipteridine derivatives as organic cathodes for Li- and Na-ion batteries. ACS Applied Energy Materials, 3(9), pp. 8302-8308. (doi: 10.1021/acsaem.0c00829) (PMID:33015587) (PMCID:PMC7525807)

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Abstract

Organic-based electrodes for Li- and Na-ion batteries present attractive alternatives to commonly applied inorganic counterparts which can often carry with them supply-chain risks, safety concerns with thermal runaway, and adverse environmental impact. The ability to chemically direct the structure of organic electrodes through control over functional groups is of particular importance, as this provides a route to fine-tune electrochemical performance parameters. Here, we report two benzo-dipteridine derivatives, BF-Me2 and BF-H2, as high-capacity electrodes for use in Li- and Na-ion batteries. These moieties permit binding of multiple Li-ions per molecule while simultaneously ensuring low solubility in the supporting electrolyte, often a precluding issue with organic electrodes. Both display excellent electrochemical stability, with discharge capacities of 142 and 182 mAh g–1 after 100 cycles at a C/10 rate and Coulombic efficiencies of 96% and ∼ 100% demonstrated for BF-Me2 and BF-H2, respectively. The application of a Na-ion cell has also been demonstrated, showing discharge capacities of 88.8 and 137 mAh g–1 after 100 cycles at a C/2 rate for BF-Me2 and BF-H2, respectively. This work provides an encouraging precedent for these and related structures to provide versatile, high-energy density, and long cycle-life electrochemical energy storage materials.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Wilson, Dr Claire and Amores Segura, Marco and Corr, Professor Serena and Johnston, Beth and Cooke, Professor Graeme and McCarron, Mr Liam and Cariello, Mr Michele
Authors: Cariello, M., Johnston, B., Bhosale, M., Amores Segura, M., Wilson, E., McCarron, L. J., Wilson, C., Corr, S. A., and Cooke, G.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:ACS Applied Energy Materials
Publisher:American Chemical Society
ISSN:2574-0962
ISSN (Online):2574-0962
Published Online:18 August 2020
Copyright Holders:Copyright © 2020 The Authors
First Published:First published in ACS Applied Energy Materials 3(9):8302–8308
Publisher Policy:Reproduced under a Creative Commons licence
Data DOI:10.5525/gla.researchdata.1046

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
173075(Iso)alloxazine incorporating electrodes as high-performance organic energy storage materialsGraeme CookeEngineering and Physical Sciences Research Council (EPSRC)EP/P00315X/1Chemistry