纳米花
非阻塞I/O
材料科学
化学工程
氧化镍
透射电子显微镜
傅里叶变换红外光谱
溶剂热合成
扫描电子显微镜
热重分析
纳米技术
电容
超级电容器
氧化物
纳米结构
电极
复合材料
冶金
化学
有机化学
物理化学
催化作用
工程类
作者
Yuying Yang,Yanli Liang,Ziyu Zhang,Xiaogang Zhang,Hongying Wu,Zhongai Hu
标识
DOI:10.1016/j.jallcom.2015.10.253
摘要
Synthesis of nickel oxide (NiO) nanomaterials with well-controlled morphologies is crucial to obtain superior electrochemical properties. Herein, we present a facile solvothermal route for the fabrication of three different morphologies NiO containing particles, honeycomb and three-dimensional (3D) nanoflower by adjusting the solvothermal reaction time. The possible mechanism for the formation process of the hierarchical 3D nanoflower architecture is investigated and proposed. The morphology and crystal structure of the as-prepared NiO were characterized by fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TG), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and the Brunauer–Emmett–Teller method (BET). The effects of morphologies on the electrochemical performances were systematically studied. It was found that NiO with flower-like structure exhibited the highest specific capacitance (364 F g−1 at 1 A g−1), excellent rate capability (64% capacitance retention from 1 A g−1 to 10 A g−1) and excellent cycling stability (no decrease in specific capacitance after 1200 test cycles).
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