Electrodeposition of α-MnO2 /γ-MnO2 on Carbon Nanotube for Yarn Supercapacitor

Scientific Reports
Jae-Hun JeongSeon Jeong Kim

Abstract

Yarn supercapacitors have attracted renewed interest as promising energy storage for wearable devices due to their lightweight, long cycling lifetime and excellent weavability. There has been much effort to fabricate high performance yarn supercapacitor by depositing pseudo-capacitive materials on the outer surface of the carbon fibers. However, a key challenge still remains to achieve high capacitance and high mass loading without sacrificing the cycling stability. Herein, we perform a phase-controlled of MnO2 at various deposition temperatures with ultrahigh mass loading of 11 mg/cm2 on a MWNT sheets and fabricate it to yarn structure to achieve high capacitance without decreasing in the electrochemical performance. The structure of optimized sample (MnO2/CNTs-60, deposition at 60 °C) consists of the composite of primary α-MnO2 nanosheets and secondary γ-MnO2 nanoparticles. The heteronanostructures of MnO2 provide facile ionic and electric transport in the yarn electrode, resulting in improvement of electrochemical performance and cycling stability. The MnO2/CNTs-60 yarn electrode with ultrahigh mass loading delivers a high areal capacitance of 3.54 F/cm2 at 1 mA/cm2 and an excellent rate capability. Finally, the MnO2/CNTs-60...Continue Reading

References

Dec 22, 2010·Chemical Society Reviews·Weifeng WeiDouglas G Ivey
Sep 1, 2012·Advanced Materials·Yongping FuDechun Zou
Oct 31, 2012·Angewandte Chemie·Tao ChenHuisheng Peng
Aug 21, 2013·Advanced Materials·Xuli ChenHuisheng Peng
Nov 12, 2013·Angewandte Chemie·Zhibin YangHuisheng Peng
Dec 20, 2013·Advanced Materials·Changsoon ChoiSeon Jeong Kim
Mar 24, 2015·Scientific Reports·Changsoon ChoiSeon Jeong Kim
Feb 27, 2016·ACS Nano·Ali K YetisenSeok Hyun Yun
Mar 24, 2016·Angewandte Chemie·Wei WengHuisheng Peng
Dec 16, 2016·Nature Communications·Changsoon ChoiSeon Jeong Kim

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Citations

Feb 27, 2020·Physical Chemistry Chemical Physics : PCCP·Teklewold GetachewShimelis Admassie
Mar 18, 2021·ACS Applied Materials & Interfaces·Junyeong YunJodie L Lutkenhaus
Jul 6, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Jung-Min JiHwan Kyu Kim

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Methods Mentioned

BETA
X-ray
transmission electron microscopy

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