纳米片
超级电容器
材料科学
电容
热液循环
电流密度
电致变色
电化学
化学工程
储能
功率密度
纳米技术
电极
化学
功率(物理)
量子力学
物理
工程类
物理化学
作者
Xinrui Yue,Gang Wang,Jing Wang,Licai Fan,Jian Hao,Shen Wang,Mingli Yang,Yang Liu
出处
期刊:Coatings
[Multidisciplinary Digital Publishing Institute]
日期:2022-11-05
卷期号:12 (11): 1682-1682
被引量:14
标识
DOI:10.3390/coatings12111682
摘要
In this paper, Co3O4 nanosheets were prepared by the hydrothermal method. The structure of the material was analyzed by morphological characterization and physical phase analysis, which confirmed the preparation of the product, Co3O4, showing a nanosheet structure. By studying the electrochromic properties of the prepared products, the results show that the transmittance modulation range of the Co3O4 nanosheet is 75% at 780 nm. The coloring response time and bleaching response time is about 3.8 s and 3.4 s, respectively. Electrochemical tests show that the Co3O4 nanosheets have good capacitive properties. Their specific capacitance reaches 1850 F/g when the current density is 1 A/g. When the current density is 5 A/g, the specific capacitance can still maintain 99.6% after 5000 cycles. In addition, Co3O4//CNTs devices can provide a maximum energy density of 79.52 Wh/kg (1 A/g) and a maximum power density of 11,000 W/kg (15 A/g), showing good energy storage capacity. The above data results indicate that the prepared Co3O4 nanosheets can be used as good candidates for supercapacitors. This paper provides a new idea and method for preparing Co3O4 materials.
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