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Issue 9, 2015
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Reducing the charging voltage of a Li–O2 battery to 1.9 V by incorporating a photocatalyst

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Abstract

We here present a photoassisted rechargeable Li–O2 battery by integrating a g-C3N4 photocatalyst to address the overpotential issue of conventional non-aqueous Li–O2 batteries. The high charging overpotential of a Li–O2 battery is compensated by the photovoltage, and finally an ultralow charging voltage of 1.9 V is achieved, which is much lower than that of any other conventional non-aqueous Li–O2 batteries. It is also worth noting that the charging voltage is even much lower than the discharging voltage (∼2.7 V), resulting in 142% energy efficiency (output electric energy/input electric energy, not including solar energy).

Graphical abstract: Reducing the charging voltage of a Li–O2 battery to 1.9 V by incorporating a photocatalyst

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Article information


Submitted
25 Jun 2015
Accepted
06 Aug 2015
First published
18 Aug 2015

Energy Environ. Sci., 2015,8, 2664-2667
Article type
Communication

Reducing the charging voltage of a Li–O2 battery to 1.9 V by incorporating a photocatalyst

Y. Liu, N. Li, S. Wu, K. Liao, K. Zhu, J. Yi and H. Zhou, Energy Environ. Sci., 2015, 8, 2664
DOI: 10.1039/C5EE01958C

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