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Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
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Terephthalate-based cobalt hydroxide: a new electrode material for supercapacitors with ultrahigh capacitance
Xiuling Ou1, Yifan Wang, Shuijin Lei
1School of Materials Science and Engineering, Nanchang University, Nanchang, Jiangxi 330031, China. shjlei@ncu.edu.cn.
Dalton Transactions (Cambridge, England : 2003)
|October 10, 2018
Summary
Terephthalate-based cobalt hydroxide, a novel electrode material, demonstrates high charge storage capacity and stability for supercapacitors. This material shows promise for advanced energy storage applications.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Developing high-performance supercapacitors requires novel electrode materials.
- Layered hydroxyl derivatives are promising candidates for energy storage.
Purpose of the Study:
- To synthesize and characterize terephthalate-based cobalt hydroxide (Co2(OH)2(C8H4O4)) as a supercapacitor electrode.
- To evaluate the electrochemical performance of the synthesized material.
Main Methods:
- In situ synthesis of Co2(OH)2(C8H4O4) on nickel foam via a hydrothermal route.
- Characterization using scanning electron microscopy.
- Electrochemical testing of the material as a supercapacitor electrode.
Main Results:
- Co2(OH)2(C8H4O4) synthesized as double-blade lath crystals.
- Specific capacity of 9.36 C cm-2 (1261 C g-1) at 10 mA cm-2.
- 82.4% capacity retention over 5000 cycles at 50 mA cm-2.
- Asymmetric supercapacitor achieved 30.62 W h kg-1 energy density at 221 W kg-1.
Conclusions:
- Terephthalate-based cobalt hydroxide is a promising electrode material for supercapacitors.
- The material exhibits excellent charge storage capacity and cycling stability.
- The developed asymmetric supercapacitor demonstrates high energy and power densities.
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