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Carbon Nanotube Fibers Decorated with $MnO_{2}$ for Wire-Shaped Supercapacitor
| Content Provider | MDPI |
|---|---|
| Author | Zhang, Luman Zhang, Xuan Wang, Jian Seveno, David Fransaer, Jan Locquet, Jean-Pierre Seo, Jin |
| Copyright Year | 2021 |
| Description | Fibers made from CNTs (CNT fibers) have the potential to form high-strength, lightweight materials with superior electrical conductivity. CNT fibers have attracted great attention in relation to various applications, in particular as conductive electrodes in energy applications, such as capacitors, lithium-ion batteries, and solar cells. Among these, wire-shaped supercapacitors demonstrate various advantages for use in lightweight and wearable electronics. However, making electrodes with uniform structures and desirable electrochemical performances still remains a challenge. In this study, dry-spun CNT fibers from CNT carpets were homogeneously loaded with $MnO_{2}$ nanoflakes through the treatment of $KMnO_{4}$. These functionalized fibers were systematically characterized in terms of their morphology, surface and mechanical properties, and electrochemical performance. The resulting $MnO_{2}$–CNT fiber electrode showed high specific capacitance (231.3 F/g) in a $Na_{2}SO_{4}$ electrolyte, 23 times higher than the specific capacitance of the bare CNT fibers. The symmetric wire-shaped supercapacitor composed of $CNT–MnO_{2}$ fiber electrodes and a $PVA/H_{3}PO_{4}$ electrolyte possesses an energy density of 86 nWh/cm and good cycling performance. Combined with its light weight and high flexibility, this CNT-based wire-shaped supercapacitor shows promise for applications in flexible and wearable energy storage devices. |
| Starting Page | 3479 |
| e-ISSN | 14203049 |
| DOI | 10.3390/molecules26113479 |
| Journal | Molecules |
| Issue Number | 11 |
| Volume Number | 26 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-06-07 |
| Access Restriction | Open |
| Subject Keyword | Molecules Electrochemistry Carbon Nanotube Fiber Cnt–mno2 Hybrid Composite Wire-shaped Supercapacitor Flexible Electrode |
| Content Type | Text |
| Resource Type | Article |
