Yano Masato, Suzuki Shinya, Miyayama Masaru, Ohgaki Masataka
Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan.
Japan Science and Technology Agency, CREST, 5 Sanbancho, Chiyoda-ku, Tokyo 102-0075, Japan.
Nanomaterials (Basel). 2013 Mar 25;3(2):204-220. doi: 10.3390/nano3020204.
Nanosheet-derived H(NiCoMn)O₂ was prepared by restacking (NiCoMn)O₂ nanosheets with large or small lateral sizes and their electrochemical properties in a 1 M KOH aqueous solution; microstructural factors were compared with those of bulk H(NiCoMn)O₂ (HNCM). The electrodes composed of small nanosheets exhibited very large capacitances of 1241 F·g (395 mAh·g) at a current density of 50 mA·g, and 430 F·g (100 mAh·g) at a large current density of 1000 mA·g. These large capacitances resulted from a heterogeneous layer structure with a large surface area and pore volume. The electrodes of large nanosheets, with a strongly interconnected microstructure and a surface area slightly larger than that of HNCM, exhibited good cycle stability and capacitances larger than that of HNCM. Microstructural control through the restacking of (NiCoMn)O₂ nanosheets improved the electrochemical properties of H(Ni, Co, Mn)O₂.
通过将具有不同横向尺寸的（NiCoMn）O₂纳米片重新堆叠制备了纳米片衍生的H（NiCoMn）O₂，并研究了它们在1 M KOH水溶液中的电化学性质；将微观结构因素与块状H（NiCoMn）O₂（HNCM）进行了比较。由小纳米片组成的电极在50 mA·g的电流密度下表现出非常大的电容，为1241 F·g（395 mAh·g），在1000 mA·g的大电流密度下为430 F·g（100 mAh·g）。这些大电容源于具有大表面积和孔体积的异质层结构。大纳米片电极具有强互连的微观结构且表面积略大于HNCM，表现出良好的循环稳定性和比HNCM更大的电容。通过（NiCoMn）O₂纳米片的重新堆叠进行微观结构控制改善了H（Ni，Co，Mn）O₂的电化学性质。
