Lobinsky A A, Tolstoy V P
Department of Chemistry, Saint-Petersburg State University Peterhof 198504 Saint-Petersburg Russia
RSC Adv. 2018 Aug 21;8(52):29607-29612. doi: 10.1039/c8ra00671g. eCollection 2018 Aug 20.
In recent years, increasing attention directed at creating novel two-dimensional graphene-like materials, in particular materials based on oxides or hydroxides of transition metals, as they have a number of unique properties, which determine the perspective of their application in various fields of electronics and electrical engineering, as well as in energy storage devices. In this paper we propose a novel promising route for the synthesis of nanolayer layered double hydroxides on the basis of zinc and cobalt by a successive ionic layer deposition method. The obtained nanolayers were characterized by SEM, EDX, XRD, HRTEM, XPS and FT-IR. The results show the synthesized nanolayers were formed from two-dimensional nanocrystals with the thickness of about 6-9 nm and the morphology of the so-called "nanosheets" with the hydrotalcite-like crystal structure of an LDH. In addition, the obtained nanolayers were investigated as electrode materials for alkaline battery-supercapacitor hybrid devices and demonstrated a high specific capacitance (270 mA h g at 1 A g) and excellent electrochemical stability (3% drop in capacity after 1000 charge-discharge cycles).
近年来，人们越来越关注新型二维类石墨烯材料的制备，特别是基于过渡金属氧化物或氢氧化物的材料，因为它们具有许多独特的性质，这些性质决定了它们在电子学和电气工程的各个领域以及储能装置中的应用前景。在本文中，我们提出了一种通过连续离子层沉积法合成基于锌和钴的纳米层状双氢氧化物的新途径。通过扫描电子显微镜（SEM）、能量散射X射线光谱（EDX）、X射线衍射（XRD）、高分辨率透射电子显微镜（HRTEM）、X射线光电子能谱（XPS）和傅里叶变换红外光谱（FT-IR）对所得纳米层进行了表征。结果表明，合成的纳米层由二维纳米晶体组成，厚度约为6-9nm，形态为具有水滑石类晶体结构的所谓“纳米片”。此外，将所得纳米层作为碱性电池-超级电容器混合装置的电极材料进行了研究，结果表明其具有高比电容（在1A/g时为270mAh/g）和优异的电化学稳定性（1000次充放电循环后容量下降3%）。
