Nano‐RuO2‐decorated holey graphene composite fibers for micro‐supercapacitors with ultrahigh energy density

Compactness and versatility of fiber-based micro-supercapacitors (FMSCs) make them promising for emerging wearable electronic devices as energy storage solutions. But, increasing the energy storage capacity of microscale fiber electrodes, while retaining their high power density, remains a significa...

Full description

Saved in:
Bibliographic Details
Main Authors: Zhai, Shengli, Wang, Chaojun, Karahan, Huseyin Enis, Wang, Yanqing, Chen, Xuncai, Sui, Xiao, Huang, Qianwei, Liao, Xiaozhou, Wang, Xin, Chen, Yuan
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2020
Subjects:
Online Access:https://hdl.handle.net/10356/139226
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-139226
record_format dspace
spelling sg-ntu-dr.10356-1392262020-05-18T05:57:35Z Nano‐RuO2‐decorated holey graphene composite fibers for micro‐supercapacitors with ultrahigh energy density Zhai, Shengli Wang, Chaojun Karahan, Huseyin Enis Wang, Yanqing Chen, Xuncai Sui, Xiao Huang, Qianwei Liao, Xiaozhou Wang, Xin Chen, Yuan School of Chemical and Biomedical Engineering Engineering::Chemical engineering Carbon Nanotubes Holey Graphene Compactness and versatility of fiber-based micro-supercapacitors (FMSCs) make them promising for emerging wearable electronic devices as energy storage solutions. But, increasing the energy storage capacity of microscale fiber electrodes, while retaining their high power density, remains a significant challenge. Here, this issue is addressed by incorporating ultrahigh mass loading of ruthenium oxide (RuO2 ) nanoparticles (up to 42.5 wt%) uniformly on nanocarbon-based microfibers composed largely of holey reduced graphene oxide (HrGO) with a lower amount of single-walled carbon nanotubes as nanospacers. This facile approach involes (1) space-confined hydrothermal assembly of highly porous but 3D interconnected carbon structure, (2) impregnating wet carbon structures with aqueous Ru3+ ions, and (3) anchoring RuO2 nanoparticles on HrGO surfaces. Solid-state FMSCs assembled using those fibers demonstrate a specific volumetric capacitance of 199 F cm-3 at 2 mV s-1 . Fabricated FMSCs also deliver an ultrahigh energy density of 27.3 mWh cm-3 , the highest among those reported for FMSCs to date. Furthermore, integrating 20 pieces of FMSCs with two commercial flexible solar cells as a self-powering energy system, a light-emitting diode panel can be lit up stably. The current work highlights the excellent potential of nano-RuO2 -decorated HrGO composite fibers for constructing micro-supercapacitors with high energy density for wearable electronic devices. 2020-05-18T05:57:35Z 2020-05-18T05:57:35Z 2018 Journal Article Zhai, S., Wang, C., Karahan, H. E., Wang, Y., Chen, X., Sui, X., . . . Chen, Y. (2018). Nano‐RuO2‐decorated holey graphene composite fibers for micro‐supercapacitors with ultrahigh energy density. Small, 14(29), 1800582-. doi:10.1002/smll.201800582 1613-6810 https://hdl.handle.net/10356/139226 10.1002/smll.201800582 29882370 2-s2.0-85050199786 29 14 en Small © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Engineering::Chemical engineering
Carbon Nanotubes
Holey Graphene
spellingShingle Engineering::Chemical engineering
Carbon Nanotubes
Holey Graphene
Zhai, Shengli
Wang, Chaojun
Karahan, Huseyin Enis
Wang, Yanqing
Chen, Xuncai
Sui, Xiao
Huang, Qianwei
Liao, Xiaozhou
Wang, Xin
Chen, Yuan
Nano‐RuO2‐decorated holey graphene composite fibers for micro‐supercapacitors with ultrahigh energy density
description Compactness and versatility of fiber-based micro-supercapacitors (FMSCs) make them promising for emerging wearable electronic devices as energy storage solutions. But, increasing the energy storage capacity of microscale fiber electrodes, while retaining their high power density, remains a significant challenge. Here, this issue is addressed by incorporating ultrahigh mass loading of ruthenium oxide (RuO2 ) nanoparticles (up to 42.5 wt%) uniformly on nanocarbon-based microfibers composed largely of holey reduced graphene oxide (HrGO) with a lower amount of single-walled carbon nanotubes as nanospacers. This facile approach involes (1) space-confined hydrothermal assembly of highly porous but 3D interconnected carbon structure, (2) impregnating wet carbon structures with aqueous Ru3+ ions, and (3) anchoring RuO2 nanoparticles on HrGO surfaces. Solid-state FMSCs assembled using those fibers demonstrate a specific volumetric capacitance of 199 F cm-3 at 2 mV s-1 . Fabricated FMSCs also deliver an ultrahigh energy density of 27.3 mWh cm-3 , the highest among those reported for FMSCs to date. Furthermore, integrating 20 pieces of FMSCs with two commercial flexible solar cells as a self-powering energy system, a light-emitting diode panel can be lit up stably. The current work highlights the excellent potential of nano-RuO2 -decorated HrGO composite fibers for constructing micro-supercapacitors with high energy density for wearable electronic devices.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Zhai, Shengli
Wang, Chaojun
Karahan, Huseyin Enis
Wang, Yanqing
Chen, Xuncai
Sui, Xiao
Huang, Qianwei
Liao, Xiaozhou
Wang, Xin
Chen, Yuan
format Article
author Zhai, Shengli
Wang, Chaojun
Karahan, Huseyin Enis
Wang, Yanqing
Chen, Xuncai
Sui, Xiao
Huang, Qianwei
Liao, Xiaozhou
Wang, Xin
Chen, Yuan
author_sort Zhai, Shengli
title Nano‐RuO2‐decorated holey graphene composite fibers for micro‐supercapacitors with ultrahigh energy density
title_short Nano‐RuO2‐decorated holey graphene composite fibers for micro‐supercapacitors with ultrahigh energy density
title_full Nano‐RuO2‐decorated holey graphene composite fibers for micro‐supercapacitors with ultrahigh energy density
title_fullStr Nano‐RuO2‐decorated holey graphene composite fibers for micro‐supercapacitors with ultrahigh energy density
title_full_unstemmed Nano‐RuO2‐decorated holey graphene composite fibers for micro‐supercapacitors with ultrahigh energy density
title_sort nano‐ruo2‐decorated holey graphene composite fibers for micro‐supercapacitors with ultrahigh energy density
publishDate 2020
url https://hdl.handle.net/10356/139226
_version_ 1681058348744572928