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)

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: Corr, Professor Serena and Cariello, Dr Michele and Cooke, Professor Graeme and McCarron, Mr Liam and Wilson, Dr Claire and Amores Segura, Mr Marco and Johnston, Beth
• 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

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
173075		(Iso)alloxazine incorporating electrodes as high-performance organic energy storage materials	Graeme Cooke	Engineering and Physical Sciences Research Council (EPSRC)	EP/P00315X/1	Chemistry