Reducing the charging voltage of a Li-O2 battery to 1.9 v by incorporating a photocatalyst

Yang Liu; Na Li; Shichao Wu; Kaiming Liao; Kai Zhu; Jin Yi; Haoshen Zhou

doi:10.1039/c5ee01958c

Reducing the charging voltage of a Li-O₂ battery to 1.9 v by incorporating a photocatalyst

Yang Liu, Na Li, Shichao Wu, Kaiming Liao, Kai Zhu, Jin Yi, Haoshen Zhou

Research output: Contribution to journal › Article › peer-review

159 Scopus citations

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).

Original language	English
Pages (from-to)	2664-2667
Number of pages	4
Journal	Energy and Environmental Science
Volume	8
Issue number	9
DOIs	https://doi.org/10.1039/c5ee01958c
State	Published - 1 Sep 2015
Externally published	Yes

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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).",

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AU - Li, Na

AU - Wu, Shichao

AU - Liao, Kaiming

AU - Zhu, Kai

AU - Yi, Jin

AU - Zhou, Haoshen

PY - 2015/9/1

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N2 - 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).

AB - 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).

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Reducing the charging voltage of a Li-O₂ battery to 1.9 v by incorporating a photocatalyst

Abstract

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