Simple and novel strategy to fabricate ultra-thin, lightweight, stackable solid-state supercapacitors based on MnO2-incorporated CNT-web paper
| Autor: | Heejoon Ahn, Bebi Patil, Youngjin Jeong, Hyeonjun Song, Changyong Park, Suhyun Ahn |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Stacking Nanotechnology 02 engineering and technology Carbon nanotube engineering.material 010402 general chemistry 01 natural sciences Capacitance Industrial and Manufacturing Engineering law.invention Coating law Electrical and Electronic Engineering Electrical conductor Civil and Structural Engineering Supercapacitor Mechanical Engineering Building and Construction 021001 nanoscience & nanotechnology Pollution 0104 chemical sciences General Energy Electrode engineering 0210 nano-technology Voltage |
| Zdroj: | Energy. 142:608-616 |
| ISSN: | 0360-5442 |
| Popis: | Thin, lightweight, stackable, solid-state supercapacitors are in great demand in the electronics industry because of their use in miniaturized devices. Herein, we report a simple and novel strategy to fabricate ultra-thin, lightweight, and stackable symmetric supercapacitors using MnO 2 -incorporated carbon nanotube (CNT)-web paper. SEM and TEM analyses revealed a uniform nanometer-scale coating of MnO 2 on the individual fibers of the CNT-web paper after simple deposition at room temperature. The network structure of free-standing conductive CNT-web paper provides a short diffusion path, allowing for complete utilization of MnO 2 in the charge storage process. A MnO 2 /CNT-web paper electrode showed an excellent areal capacitance of 135 mF cm −2 at 5 mV s −1 with a remarkable capacitance retention of 95% after 10,000 cycles. A symmetric solid-state supercapacitor containing MnO 2 /CNT-web paper displayed a high areal capacitance of 57 mF cm −2 with an energy density of 0.018 mWh cm −2 and a capacitance retention as high as 86% after 10,000 cycles. In addition, the voltage and capacitance were tripled by simply stacking three symmetric supercapacitors and connecting them in series and in parallel, respectively. We are optimistic that the excellent performance of the ultra-thin CNT-web paper-based supercapacitors demonstrated here will facilitate the development of compact supercapacitor banks in the near future. |
| Databáze: | OpenAIRE |
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