假电容器
超级电容器
纳米棒
材料科学
热液循环
纳米结构
电容
化学工程
电化学
电极
纳米技术
水热合成
镍
壳体(结构)
冶金
化学
复合材料
物理化学
工程类
作者
En-Syuan Lin,Feng-Sheng Chao,Chen-Jui Liang,Chi‐Jung Chang,Alexander W. Fang,Chia-Cheng Lin,Yu‐Cheng Chang,Chien‐Yie Tsay,Jerry J. Wu,Chin-Yi Chen
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2021-12-01
卷期号:168 (12): 123502-123502
被引量:5
标识
DOI:10.1149/1945-7111/ac3a27
摘要
Supercapacitive properties of Co/ZnCo oxide composite with a core–shell nanostructure (Co 3 O 4 /ZnCo 2 O 4 ) prepared directly onto a nickel foam substrate by a two-step hydrothermal method were investigated. The synthesized core–shell structure consisted of some ∼40–100 nm in thick flaky ZnCo 2 O 4 deposits coated onto the surface of Co 3 O 4 nanorods measuring ∼150 nm in diameter. The specific capacitance value of the Co 3 O 4 /ZnCo 2 O 4 core–shell nanostructure synthesized by hydrothermal at 130 °C for a ZnCo 2 O 4 deposition time of 2 h can attain 1804 F g −1 at a scan rate of 5 mV s −1 . Furthermore, the core–shell structured electrode still exhibited a relatively good capacitance retention of more than 93% after 3000 CV cycles due to the superior structural support of Co 3 O 4 scaffolds. The Co 3 O 4 /ZnCo 2 O 4 core–shell structure exhibits excellent electrochemical performances and, as such, is one of the more promising active materials in pseudocapacitor applications.
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