NiO电极材料的溶胶凝胶法合成及其超级电容的性能

doi:10.11901/1005.3093.2016.529

材料研究学报

2017, Vol. 31

Issue (9): 714-720 DOI: 10.11901/1005.3093.2016.529

研究论文

本期目录 | 过刊浏览

NiO电极材料的溶胶凝胶法合成及其超级电容的性能

弥宁¹(

), 赵磊¹, 刘卯成²

1 陇东学院机械工程学院庆阳 745000
2 兰州理工大学甘肃省有色金属新材料重点实验室兰州 730050

NiO Electrode Synthesized via Sol-gel Method and Super-Capacitive Performance

Ning MI¹(

), Lei ZHAO¹, Maocheng LIU²

1 School of Mechanical Engineering, Longdong University, Qingyang 745000, China
2 State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China

引用本文:

弥宁, 赵磊, 刘卯成. NiO电极材料的溶胶凝胶法合成及其超级电容的性能[J]. 材料研究学报, 2017, 31(9): 714-720.
Ning MI, Lei ZHAO, Maocheng LIU. NiO Electrode Synthesized via Sol-gel Method and Super-Capacitive Performance[J]. Chinese Journal of Materials Research, 2017, 31(9): 714-720.

全文: PDF(964 KB) HTML

摘要:

用溶胶凝胶法和简单热处理合成的NiO电极材料,其最大比电容达到744 F/g。使用X射线粉末衍射、扫描电子显微镜、投射电子显微镜和N₂气吸附解吸仪等手段表征了NiO材料的微观结构和聚集形态。将氧化镍和活性炭分别作为正负极组装非对称性电容器,用循环伏安法和恒流充放电法研究其在2 mol/L的KOH电解液中的超级电容性能。这种非对称性电容器表现出良好的能量密度、功率密度和循环稳定性,循环1000次后其循环稳定性能为初始比电容值的84.3%。

关键词 ：无机非金属材料, 非对称性电容器, NiO, 溶胶凝胶, 超级电容器

Abstract：

NiO with maximum specific capacitance of 744 Fg^-1 was successfully synthesized by sol-gel method and then simple calcination. The microstructure and aggregation morphology of the as-prepared NiO electrode were characterized by powder X-ray diffract ometer (XRD) and scanning electron microscopy (SEM), transmission electron microscopy (TEM) and BET. An asymmetric supercapacitor has been constructed with nickel oxide as the positive electrode and activated carbon as the negative electrode, respectively. The performance of the asymmetric supercapacitor was investigated in 2 mol/L KOH aqueous electrolyte using cyclic voltammetry (CV) and galvanostatic charge/discharge test. The asymmetric supercapacitor exhibited excellent energy density, power density and cycle stability, especially good electrochemical stability, i.e. even after consecutive 1,000 cycles the capacitance of the capacitor still kept at 84.3% of the initial value.

Key words： inorganic non-metallic materials asymmetric supercapacitor nickel oxide sol-gel supercapatitor

收稿日期: 2016-07-27

ZTFLH:

TB321

基金资助:国家自然科学基金(21403099)和陇东学院青年科技创新项目(XYZK1608)

作者简介:

作者简介弥宁,男,1975年生,副教授

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https://www.cjmr.org/CN/10.11901/1005.3093.2016.529 或 https://www.cjmr.org/CN/Y2017/V31/I9/714

图1 NiO电极材料的XRD图谱

图2 NiO电极材料的扫描电镜图片

图3 NiO电极材料的透射电镜图片

图4 NiO电极材料的材料的吸附-脱附等温滞回线,插图为样品的孔径分布图

图5 AC电极和NiO电极在扫描速率5 mV/s时的循环伏安曲线

图6 电流密度为5 mAcm-2时的充放电曲线图

图7 非对称性超级电容器在2 mol/L KOH电解质中的电化学曲线图

图8 不同电流密度下非对称性超级电容器和AC双电层电容器比电容变化图

图9 非对称性超级电容器和AC双电层电容器的拉贡图

图10 电流密度为10 mAcm-2非对称性超级电容器循环寿命图(插图为非对称性超级电容器充放电曲线)

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