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Issue 29, 2015
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A subtractive approach to molecular engineering of dimethoxybenzene-based redox materials for non-aqueous flow batteries

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Abstract

The development of new high capacity redox active materials is key to realizing the potential of non-aqueous redox flow batteries (RFBs). In this paper, a series of substituted 1,4-dimethoxybenzene based redox active molecules have been developed via a subtractive design approach. Five molecules have been proposed and developed by removing or reducing the bulky substituent groups of DBBB (2,5-di-tert-butyl-1,4-bis(2-methoxyethoxy)benzene), a successful overcharge protection material for lithium-ion batteries. Of these derivatives, 2,3-dimethyl-1,4-dimethoxybenzene (23DDB) and 2,5-dimethyl-1,4-dimethoxybenzene (25DDB) are particularly promising as they demonstrate favorable electrochemical characteristics at gravimetric capacities (161 mA h g−1) that approach the stability limit of chemically reversible dimethoxybenzene based structures. Diffusivity, solubility, and galvanostatic cycling results indicate that both 23DDB and 25DDB molecules have promise for non-aqueous RFBs.

Graphical abstract: A subtractive approach to molecular engineering of dimethoxybenzene-based redox materials for non-aqueous flow batteries

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Supplementary files

Article information


Submitted
01 Apr 2015
Accepted
18 Jun 2015
First published
18 Jun 2015

J. Mater. Chem. A, 2015,3, 14971-14976
Article type
Communication
Author version available

A subtractive approach to molecular engineering of dimethoxybenzene-based redox materials for non-aqueous flow batteries

J. Huang, L. Su, J. A. Kowalski, J. L. Barton, M. Ferrandon, A. K. Burrell, F. R. Brushett and L. Zhang, J. Mater. Chem. A, 2015, 3, 14971
DOI: 10.1039/C5TA02380G

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