Construction of flexible MnCo2O4@FeCoNi-LDH electrode materials with nanoflower-like and hierarchical structure for high-performance asymmetric supercapacitor.
Yawen Liu, Chunxiao Wang, Huiru Sun, Lejiao Duan, Zhihan Yang, Xi Wang, Jingquan Liu
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引用次数: 0
Abstract
In the realm of energy storage, flexible portable supercapacitors have been receiving increasing attention in the last few years. Nonetheless, the process of choosing appropriate flexible materials remains challenging. Herein, we successfully synthesized a flower-like MnCo2O4@FeCoNi-LDH/CC (MnCo@FCN/CC) hierarchically nanostructured electrode material by anchoring MnCo2O4 (MnCo) on a flexible carbon cloth (CC) substrate first and then loading FeCoNi-LDH nanosheets on MnCo2O4. The synthesized MnCo@FCN/CC material has numerous mesopores, huge specific surface area and multivalent metal ions, which makes MnCo@FCN/CC nanomaterial possess powerful electrochemical reaction kinetics and exceptional cycle stability. As a result, the electrode material exhibits a high specific capacitance (Cs) value of 2235F g-1 and maintains 88.6 % of the initial capacitance after 10,000 cycles. Significantly, a flexible asymmetric supercapacitor (ASC) constructed in the form of MnCo@FCN/CC//AC/CC has excellent energy density (51.66 Wh kg-1 at 890.81 W kg-1), and after 10,000 times of constant current charging and discharging, the capacitance retention rate still reaches 92.9 %. Therefore, the as-construct MnCo@FCN/CC//AC/CC high-performance flexible supercapacitors should envision broad commercial applications in flexible energy storage devices.
期刊介绍:
The Journal of Colloid and Interface Science publishes original research findings on the fundamental principles of colloid and interface science, as well as innovative applications in various fields. The criteria for publication include impact, quality, novelty, and originality.
Emphasis:
The journal emphasizes fundamental scientific innovation within the following categories:
A.Colloidal Materials and Nanomaterials
B.Soft Colloidal and Self-Assembly Systems
C.Adsorption, Catalysis, and Electrochemistry
D.Interfacial Processes, Capillarity, and Wetting
E.Biomaterials and Nanomedicine
F.Energy Conversion and Storage, and Environmental Technologies