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Issue 32, 2016
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Lowering the charge voltage of Li–O2 batteries via an unmediated photoelectrochemical oxidation approach

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Abstract

We here demonstrate an unmediated photoelectrochemical oxidation approach to address the overpotential issue of Li–O2 batteries during the charge process. We show that photoexcited holes from the photoelectrode provide a direct oxidation of solid Li2O2, without the use of a redox mediator. The Li–O2 battery composed of carbon nitride on carbon paper as a cathode and also as a photoelectrode exhibits an ultralow charge voltage of 1.96 V resulting in a ‘negative’ overpotential and good cycling performance. These results could represent a new and promising avenue for the future development of photo-charging all-solid-state batteries.

Graphical abstract: Lowering the charge voltage of Li–O2 batteries via an unmediated photoelectrochemical oxidation approach

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Publication details

The article was received on 29 Apr 2016, accepted on 16 Jun 2016 and first published on 16 Jun 2016


Article type: Communication
DOI: 10.1039/C6TA03583C
Citation: J. Mater. Chem. A, 2016,4, 12411-12415

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    Lowering the charge voltage of Li–O2 batteries via an unmediated photoelectrochemical oxidation approach

    Y. Liu, N. Li, K. Liao, Q. Li, M. Ishida and H. Zhou, J. Mater. Chem. A, 2016, 4, 12411
    DOI: 10.1039/C6TA03583C

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