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Synthesis of N-Doped Graphene Photo-Catalyst for Photo-Assisted Charging of Li-Ion Oxygen Battery
Global Challenges ( IF 4.4 ) Pub Date : 2023-12-07 , DOI: 10.1002/gch2.202300166 Nilay Kaçar 1, 2 , Ersu Lökçü 1 , Meltem Çayirli 1 , Reşat Can Özden 1 , Sahin Coskun 1 , Cigdem Toparli 3 , İbrahim Çelikyürek 1 , Mustafa Anik 1
Global Challenges ( IF 4.4 ) Pub Date : 2023-12-07 , DOI: 10.1002/gch2.202300166 Nilay Kaçar 1, 2 , Ersu Lökçü 1 , Meltem Çayirli 1 , Reşat Can Özden 1 , Sahin Coskun 1 , Cigdem Toparli 3 , İbrahim Çelikyürek 1 , Mustafa Anik 1
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In this work, nitrogen (N)-doped graphene film is synthesized, as a photo-catalyst, on one side of the copper foam by chemical vapor deposition and the copper foam is directly used as an electrode after porous Pd@rGO cathode loading to the other side of the foam for the photo-assisted charging of the Li-ion oxygen battery. The amount of urea (CO(NH2)2), which is used as N atom source, is optimized to get maximum photo-anodic currents from the n-type graphene films. The optical band gap and the valance band edge potential of the optimized N-doped graphene film are determined as 2.00 eV and 3.71 VLi+/Li, respectively. X-ray photoelectron spectra provided that the atomic percent of N atoms in the graphene film is 1.34% and the graphitic, pyrrolic and pyridinic N atom percentages are 54.01%, 42.20% and 3.79%, respectively. The photo-assisted charging tests indicated that the N-doped graphene film photo-catalyst reduced the charging potential significantly even at 1000 mA g−1 (0.1 mA cm−2) current density and improved the cyclic discharge-charge performance of the Li-ion oxygen battery considerably.
中文翻译：
氮掺杂石墨烯光催化剂的合成用于锂离子氧电池光辅助充电
本工作通过化学气相沉积法在泡沫铜的一侧合成了作为光催化剂的氮（N）掺杂石墨烯薄膜，并在多孔Pd@rGO阴极负载后直接将泡沫铜用作电极泡沫的另一面用于锂离子氧电池的光辅助充电。优化用作N原子源的尿素(CO(NH 2 ) 2 )的量，以从n型石墨烯薄膜获得最大光阳极电流。优化后的N掺杂石墨烯薄膜的光学带隙和价带边缘电势分别为2.00 eV和3.71 V Li+/Li 。 X射线光电子能谱显示，石墨烯薄膜中N原子的原子百分比为1.34%，石墨、吡咯和吡啶N原子百分比分别为54.01%、42.20%和3.79%。光辅助充电测试表明，即使在1000 mA g -1 (0.1 mA cm -2 )电流密度下，N掺杂石墨烯薄膜光催化剂也能显着降低充电电位，并改善Li-电池的循环充放电性能。离子氧电池相当大。
更新日期：2023-12-07
中文翻译：
氮掺杂石墨烯光催化剂的合成用于锂离子氧电池光辅助充电
本工作通过化学气相沉积法在泡沫铜的一侧合成了作为光催化剂的氮（N）掺杂石墨烯薄膜，并在多孔Pd@rGO阴极负载后直接将泡沫铜用作电极泡沫的另一面用于锂离子氧电池的光辅助充电。优化用作N原子源的尿素(CO(NH 2 ) 2 )的量，以从n型石墨烯薄膜获得最大光阳极电流。优化后的N掺杂石墨烯薄膜的光学带隙和价带边缘电势分别为2.00 eV和3.71 V Li+/Li 。 X射线光电子能谱显示，石墨烯薄膜中N原子的原子百分比为1.34%，石墨、吡咯和吡啶N原子百分比分别为54.01%、42.20%和3.79%。光辅助充电测试表明，即使在1000 mA g -1 (0.1 mA cm -2 )电流密度下，N掺杂石墨烯薄膜光催化剂也能显着降低充电电位，并改善Li-电池的循环充放电性能。离子氧电池相当大。
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