Ali Can Çelt, Meltem Çayirli, Reşat Can Özden, Ersu Lökçü, Mustafa Anik
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Abstract
In this study, bilayer MoS2 was synthesized on graphene film using chemical vapor deposition (CVD) to get a hetero-film photo-catalyst for the photo-assisted charging of Li-oxygen battery. The synthesized hetero-film exhibited an optical band gap of 1.8 eV and a valence band edge potential of −1.23 VAg/AgCl (2.04 VLi+/Li). Fast-responding photocurrents in the microampere range were achieved through on-off cycles under visible-light irradiation. The anodic nature of the photocurrents indicated that the synthesized semiconductor film was n-type. Photo-assisted testing demonstrated that the MoS2/graphene hetero-film photo-catalyst significantly reduced the charging potential and increased the discharging potential at a current density of 0.1 mA cm−2, thereby greatly enhancing the cyclic performance of the Li-oxygen battery.
期刊介绍：
ChemElectroChem is aimed to become a top-ranking electrochemistry journal for primary research papers and critical secondary information from authors across the world. The journal covers the entire scope of pure and applied electrochemistry, the latter encompassing (among others) energy applications, electrochemistry at interfaces (including surfaces), photoelectrochemistry and bioelectrochemistry.
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