期刊
NANOSCALE
卷 13, 期 18, 页码 8562-8574出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nr01016f
关键词
-
类别
资金
- National Natural Science Foundation of China [51672040, 51972049]
The study focuses on the synthesis of hollow Ni-Co ADH nanocages with Cu2O templates and the investigation of their electrochemical performance through experimental and theoretical approaches. Ni-Co ADHs exhibit high specific capacitance and excellent cycling performance, indicating potential applications as electrode materials for supercapacitors.
The reasonable design of the composition and hollow structure of electrode materials is beneficial for promoting the electrochemical properties and stability of electrode materials for high-performance supercapacitors, and it is of great significance to understand the inherent effect of these features on their performance. In this paper, the amorphous Ni-Co double hydroxide nanocages with hollow structures (Ni-Co ADHs) including quasi-sphere, cube and flower are delicately tailored via a Cu2O template-assisted approach. By combining experimental characterization and density functional theory (DFT) calculations, we systematically study the morphological growth of Cu2O templates under different conditions and the electrochemical performance of Ni-Co ADHs. Due to the coordination and synergistic effect between different components, the unique hollow structure and the nature of amorphous materials, Ni-Co ADHs deliver a high specific capacitance of 1707 F g(-1) at 1 A g(-1). The DFT calculations demonstrate that Ni-Co ADH nanocages exhibit an optimal redox reaction energy barrier and immensely promote the performance. In addition, a hybrid supercapacitor assembled with Ni-Co ADHs as a cathode and active carbon (AC) as an anode shows a high energy density of 33.8 W h kg(-1) at a power density of 850 W kg(-1) and exhibits an excellent cycling performance with a retention rate of 98% after 50 000 cycles. The successful synthesis of Ni-Co ADH nanocages, combined with rational computational simulations, indicates the excellent electrochemical performance and the potential utilization of amorphous hollow nanomaterials as electrodes for supercapacitors.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据