Ali Can Çelt, Meltem Çayirli, Reşat Can Özden, Ersu Lökçü, Mustafa Anik
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引用次数: 0
摘要
本研究利用化学气相沉积（CVD）技术在石墨烯薄膜上合成了双层 MoS2，从而获得了一种用于锂氧电池光辅助充电的异质薄膜光催化剂。合成的异质薄膜的光带隙为 1.8 eV，价带边电位为-1.23 VAg/AgCl (2.04 VLi+/Li)。在可见光照射下，通过开关循环可获得微安培范围的快速响应光电流。光电流的阳极性质表明合成的半导体薄膜是 n 型的。光助测试表明，在电流密度为 0.1 mA cm-2 时，MoS2/石墨烯异质薄膜光催化剂能显著降低充电电位，提高放电电位，从而大大提高了锂氧电池的循环性能。
Synthesis of MoS₂/Graphene Hetero-Film Photocatalyst and Li-Oxygen Battery Application
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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