Sim Hwansu, Jo Changshin, Yu Taekyung, Lim Eunho, Yoon Songhun, Lee Jung Heon, Yoo Jibeom, Lee Jinwoo, Lim Byungkwon
School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 440-746 (Korea).
Chemistry. 2014 Nov 3;20(45):14880-4. doi: 10.1002/chem.201403991. Epub 2014 Sep 15.
Colloidal nanosheets of nickel-manganese layered double hydroxides (LDHs) have been synthesized in high yields through a facile reverse micelle method with xylene as an oil phase and oleylamine as a surfactant. Electron microscopy studies of the product revealed the formation of colloidal nanoplatelets with sizes of 50-150 nm, and X-ray diffraction, energy dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy studies showed that the Ni-Mn LDH nanosheets had a hydrotalcite-like structure with a formula of Ni3 Mn(OH)8 ⋅n H2 O. We found that the presence of both Ni and Mn precursors was required for the growth of Ni-Mn LDH nanosheets. As pseudocapacitors, the Ni-Mn LDH nanosheets exhibited much higher specific capacitance than unitary nickel hydroxides and manganese oxides.
通过以二甲苯为油相、油胺为表面活性剂的简便反胶束法，已高产率合成了镍 - 锰层状双氢氧化物（LDH）的胶体纳米片。对产物的电子显微镜研究揭示了尺寸为50 - 150 nm的胶体纳米片的形成，X射线衍射、能量色散X射线光谱和X射线光电子能谱研究表明，Ni - Mn LDH纳米片具有水滑石状结构，化学式为Ni3 Mn(OH)8 ⋅n H2 O。我们发现，Ni - Mn LDH纳米片的生长需要同时存在Ni和Mn前驱体。作为赝电容器，Ni - Mn LDH纳米片表现出比单一氢氧化镍和氧化锰更高的比电容。
