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Single Crystal ZrO2 Nanosheets Formed by Thermal Transformation for Solid Oxide Fuel Cells and Oxygen Sensors
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2019-09-03 00:00:00 , DOI: 10.1021/acsanm.9b01312
Tetsuya Yamada 1 , Yuta Kubota 2 , Yuki Makinose 3 , Norihiro Suzuki 4 , Kazuya Nakata 4 , Chiaki Terashima 4 , Nobuhiro Matsushita 2 , Kiyoshi Okada 5 , Akira Fujishima 4 , Ken-ichi Katsumata 4
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2019-09-03 00:00:00 , DOI: 10.1021/acsanm.9b01312
Tetsuya Yamada 1 , Yuta Kubota 2 , Yuki Makinose 3 , Norihiro Suzuki 4 , Kazuya Nakata 4 , Chiaki Terashima 4 , Nobuhiro Matsushita 2 , Kiyoshi Okada 5 , Akira Fujishima 4 , Ken-ichi Katsumata 4
Affiliation
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Monoclinic ZrO2 with a nanosheet structure has been successfully synthesized via the thermal transformation of NH4Zr2F9 using a high-temperature ionothermal synthesis. The samples were characterized by using X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, atomic force microscopy, and conductivity measurements with a multiprobe. The result indicates that the as-prepared samples have a single crystal sheet structure with a thickness of 4 nm. To the best of our knowledge, a thin film of single crystal monoclinic ZrO2 has not been reported, even though ZrO2 is an important material. In the absence of the ionic liquid (butyl-2,3-dimethylimidazolium tetrafluoroborate), the thermal transformation of NH4Zr2F9 produced porosity within the two-dimensional structure, whereas in the presence of the ionic liquid, the homogeneous sheet structure was maintained without porosity. The decomposition temperature of the ionic liquid and transformation temperature of NH4Zr2F9 were analyzed to investigate the thermal transformation process; the thermal transformation was completed before the combustion of the ionic liquid. The current vs voltage curve of a ZrO2 nanosheet indicates high resistivity and breakdown voltage (ca. 20 V), which are attributable to the single crystal structure without grain boundaries. The ZrO2 is utilized for solid oxide fuel cell and oxygen sensor; therefore, the single crystal nanosheet with high resistivity is expected to be applied to these fields. CeO2 single crystallized nanosheets were also obtained by the proposed thermal transformation method in an ionic liquid. The synthetic routes to obtain nanosheets are limited; however, the proposed method has the potential to expand the number of routes and enable the synthesis of nanosheet materials.
中文翻译：
通过热转化形成的用于固体氧化物燃料电池和氧传感器的单晶ZrO 2纳米片
通过使用高温离子热合成法对NH 4 Zr 2 F 9进行热转化，已成功合成了具有纳米片结构的单斜晶ZrO 2。通过使用X射线衍射，场发射扫描电子显微镜，透射电子显微镜，原子力显微镜和多探针电导率测量来表征样品。结果表明，所制备的样品具有厚度为4nm的单晶片结构。据我们所知，尽管ZrO 2是单晶的单晶ZrO 2薄膜，但尚未见报道。是重要的材料。在不存在离子液体（2,3-二甲基咪唑鎓四氟硼酸丁酯）的情况下，NH 4 Zr 2 F 9的热转化在二维结构内产生孔隙，而在离子液体的存在下，均相片状结构保持无孔隙。分析了离子液体的分解温度和NH 4 Zr 2 F 9的转变温度，以研究其热转变过程。热转化是在离子液体燃烧之前完成的。ZrO 2的电流-电压曲线纳米片表明高电阻率和击穿电压（约20 V），这归因于没有晶界的单晶结构。ZrO 2用于固体氧化物燃料电池和氧气传感器。因此，期望将具有高电阻率的单晶纳米片应用于这些领域。还通过提出的热转化方法在离子液体中获得了CeO 2单晶纳米片。获得纳米片的合成途径是有限的。然而，所提出的方法具有扩大路线数目的潜力并且能够合成纳米片材料。
更新日期：2019-09-03
中文翻译：
通过热转化形成的用于固体氧化物燃料电池和氧传感器的单晶ZrO 2纳米片
通过使用高温离子热合成法对NH 4 Zr 2 F 9进行热转化，已成功合成了具有纳米片结构的单斜晶ZrO 2。通过使用X射线衍射，场发射扫描电子显微镜，透射电子显微镜，原子力显微镜和多探针电导率测量来表征样品。结果表明，所制备的样品具有厚度为4nm的单晶片结构。据我们所知，尽管ZrO 2是单晶的单晶ZrO 2薄膜，但尚未见报道。是重要的材料。在不存在离子液体（2,3-二甲基咪唑鎓四氟硼酸丁酯）的情况下，NH 4 Zr 2 F 9的热转化在二维结构内产生孔隙，而在离子液体的存在下，均相片状结构保持无孔隙。分析了离子液体的分解温度和NH 4 Zr 2 F 9的转变温度，以研究其热转变过程。热转化是在离子液体燃烧之前完成的。ZrO 2的电流-电压曲线纳米片表明高电阻率和击穿电压（约20 V），这归因于没有晶界的单晶结构。ZrO 2用于固体氧化物燃料电池和氧气传感器。因此，期望将具有高电阻率的单晶纳米片应用于这些领域。还通过提出的热转化方法在离子液体中获得了CeO 2单晶纳米片。获得纳米片的合成途径是有限的。然而，所提出的方法具有扩大路线数目的潜力并且能够合成纳米片材料。
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