Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Naphthalene diimide as a two-electron anolyte for aqueous and neutral pH redox flow batteries

Author affiliations

Abstract

Developing organic materials that show stable and highly reversible redox-activity is a key challenge for achieving cost-effective and sustainable aqueous redox flow batteries (RFBs) for practical energy storage applications. We report a water-soluble naphthalene diimide (NDI) derivative using carboxylate groups, which was tested and established as a new class of versatile anolytes capable of storing two electrons in a single molecule in aqueous and neutral pH RFBs. The potassium salt of N,N′-bis(glycinyl)naphthalene diimide [K2-BNDI] showed reversible and stable two-electron reductions accompanied by ion- pairing. A prototype aqueous RFB consisting of [K2-BNDI] and 4-OH-TEMPO was constructed and showed excellent cyclability, high energy and voltage efficiencies. This study suggests a versatile way of designing new anolytes inspired by organic semiconductors that operate in a multi-electron redox mode.

Graphical abstract: Naphthalene diimide as a two-electron anolyte for aqueous and neutral pH redox flow batteries

Back to tab navigation

Supplementary files

Article information


Submitted
30 Jan 2020
Accepted
18 May 2020
First published
18 May 2020

J. Mater. Chem. A, 2020, Advance Article
Article type
Paper

Naphthalene diimide as a two-electron anolyte for aqueous and neutral pH redox flow batteries

V. Medabalmi, M. Sundararajan, V. Singh, M. Baik and H. R. Byon, J. Mater. Chem. A, 2020, Advance Article , DOI: 10.1039/D0TA01160F

Social activity

Search articles by author

Spotlight

Advertisements