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Origin of Enhanced Electricity Generation on Magnéli Phase Titanium Suboxide Nanocrystal Films
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2021-09-20 , DOI: 10.1021/acsaem.1c01840 Pengchao Si 1, 2 , Mengqi Li 1 , Xiang Wang 1 , Feifei Sun 1 , Jingjing Liu 1 , Qinhuan Wang 1 , Fuqiang Ren 1 , Haoran Kong 1, 2 , Yu Wang 1
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2021-09-20 , DOI: 10.1021/acsaem.1c01840 Pengchao Si 1, 2 , Mengqi Li 1 , Xiang Wang 1 , Feifei Sun 1 , Jingjing Liu 1 , Qinhuan Wang 1 , Fuqiang Ren 1 , Haoran Kong 1, 2 , Yu Wang 1
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The energy conversion process caused by relative motion of droplets and nanofilms has aroused widespread attention. However, the mechanism is still unclear, especially regarding the modification of the nanomaterial itself. In this study, we found that by annealing TiO2 in a H2 atmosphere at different temperatures, the Magnéli phase titanium suboxide can be prepared with a lot of oxygen vacancies. Oxygen vacancies not only form negative charge centers inside the film, which enhance the attraction of Na+, but also increase the carrier concentration. By increasing the oxygen vacancy concentration, the measured VOC value was increased by ∼5 times and ISC by ∼30 times. Furthermore, a universal film preparation process was developed for the large-scale production of flexible energy conversion units based on the simple sol–gel method. Experimental results show that the prepared energy conversion unit has excellent performance of collecting rainwater energy and show a stable and continuous VOC output of ∼600 mV, combined with the surface hydrophobic treatment technology.
中文翻译：
Magnéli 相低氧化钛纳米晶薄膜增强发电的起源
液滴与纳米薄膜的相对运动引起的能量转换过程引起了广泛关注。然而，该机制仍不清楚，特别是关于纳米材料本身的改性。在这项研究中，我们发现通过在不同温度的 H 2气氛中对TiO 2进行退火，可以制备具有大量氧空位的 Magnéli 相低氧化钛。氧空位不仅在薄膜内部形成负电荷中心，增强了对Na +的吸引力，而且增加了载流子浓度。通过增加氧空位浓度，测得的V OC值增加了约 5 倍，I SC约 30 倍。此外，基于简单的溶胶-凝胶法，开发了一种通用的薄膜制备工艺，用于大规模生产柔性能量转换单元。实验结果表明，所制备的能量转换单元结合表面疏水处理技术，具有优良的收集雨水能量的性能，并表现出稳定、连续的~600 mV的V OC输出。
更新日期：2021-10-25
中文翻译：
Magnéli 相低氧化钛纳米晶薄膜增强发电的起源
液滴与纳米薄膜的相对运动引起的能量转换过程引起了广泛关注。然而，该机制仍不清楚，特别是关于纳米材料本身的改性。在这项研究中，我们发现通过在不同温度的 H 2气氛中对TiO 2进行退火，可以制备具有大量氧空位的 Magnéli 相低氧化钛。氧空位不仅在薄膜内部形成负电荷中心，增强了对Na +的吸引力，而且增加了载流子浓度。通过增加氧空位浓度，测得的V OC值增加了约 5 倍，I SC约 30 倍。此外，基于简单的溶胶-凝胶法，开发了一种通用的薄膜制备工艺，用于大规模生产柔性能量转换单元。实验结果表明，所制备的能量转换单元结合表面疏水处理技术，具有优良的收集雨水能量的性能，并表现出稳定、连续的~600 mV的V OC输出。
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