Hydrothermal assembly of micro-nano-integrated core-sheath carbon fibers for high-performance all-carbon micro-supercapacitors

Wearable electronic devices (WEDs) require flexible, stable, and long-lasting power sources for their ever-expanding functionalities. Fiber-based micro-supercapacitors (FMSCs) are promising power solutions for novel WEDs because of their mechanical flexibility, small size and good integrability. Var...

Full description

Saved in:
Bibliographic Details
Main Authors: Zhai, Shengli, Karahan, H. Enis, Wei, Li, Chen, Xuncai, Zhou, Zheng, Wang, Xin, Chen, Yuan
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2017
Subjects:
Online Access:https://hdl.handle.net/10356/83436
http://hdl.handle.net/10220/42589
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-83436
record_format dspace
spelling sg-ntu-dr.10356-834362023-12-29T06:50:48Z Hydrothermal assembly of micro-nano-integrated core-sheath carbon fibers for high-performance all-carbon micro-supercapacitors Zhai, Shengli Karahan, H. Enis Wei, Li Chen, Xuncai Zhou, Zheng Wang, Xin Chen, Yuan School of Chemical and Biomedical Engineering Supercapacitor Carbon fiber Wearable electronic devices (WEDs) require flexible, stable, and long-lasting power sources for their ever-expanding functionalities. Fiber-based micro-supercapacitors (FMSCs) are promising power solutions for novel WEDs because of their mechanical flexibility, small size and good integrability. Various porous carbon fibers have been explored as electrodes for FMSCs. However, current FMSCs often show poor rate capability due to modest electrical conductivity in fiber electrodes. Here, we demonstrate the synthesis of a micro-nano-integrated core-sheath fiber comprised of a microscale core made of commercial graphite fibers and a nanoscale hybrid sheath comprised of nitrogen doped graphene oxide sheets and multi-walled carbon nanotubes. The graphite fiber core provides fast electron transfer pathways, while the high surface area nano-hybrid sheath enables efficient capacitive energy storage. The core-sheath fiber achieves more than six times increases in capacitance retention compared to hybrid carbon fibers without the conductive core. Solid-state FMSCs were assembled using the core-sheath fibers as electrodes, which concurrently possess high length capacitance (12.8 mF cm−1) and volumetric capacitance (27 F cm−3), showing an energy density of 3.75 mWh cm–3 and a power density of 612 mW cm–3. Furthermore, multiple FMSCs can be easily assembled into flexible energy storage units with expanded voltage and current windows, demonstrating good potentials for practical applications in WEDs. Accepted version 2017-06-06T07:41:42Z 2019-12-06T15:22:46Z 2017-06-06T07:41:42Z 2019-12-06T15:22:46Z 2017 Journal Article Zhai, S., Karahan, H. E., Wei, L., Chen, X., Zhou, Z., Wang, X., et al. (2017). Hydrothermal assembly of micro-nano-integrated core-sheath carbon fibers for high-performance all-carbon micro-supercapacitors. Energy Storage Materials, in press. 2405-8297 https://hdl.handle.net/10356/83436 http://hdl.handle.net/10220/42589 10.1016/j.ensm.2017.01.004 en Energy Storage Materials © 2017 Elsevier B.V. This is the author created version of a work that has been peer reviewed and accepted for publication by Energy Storage Materials, Elsevier B.V. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.ensm.2017.01.004]. 34 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Supercapacitor
Carbon fiber
spellingShingle Supercapacitor
Carbon fiber
Zhai, Shengli
Karahan, H. Enis
Wei, Li
Chen, Xuncai
Zhou, Zheng
Wang, Xin
Chen, Yuan
Hydrothermal assembly of micro-nano-integrated core-sheath carbon fibers for high-performance all-carbon micro-supercapacitors
description Wearable electronic devices (WEDs) require flexible, stable, and long-lasting power sources for their ever-expanding functionalities. Fiber-based micro-supercapacitors (FMSCs) are promising power solutions for novel WEDs because of their mechanical flexibility, small size and good integrability. Various porous carbon fibers have been explored as electrodes for FMSCs. However, current FMSCs often show poor rate capability due to modest electrical conductivity in fiber electrodes. Here, we demonstrate the synthesis of a micro-nano-integrated core-sheath fiber comprised of a microscale core made of commercial graphite fibers and a nanoscale hybrid sheath comprised of nitrogen doped graphene oxide sheets and multi-walled carbon nanotubes. The graphite fiber core provides fast electron transfer pathways, while the high surface area nano-hybrid sheath enables efficient capacitive energy storage. The core-sheath fiber achieves more than six times increases in capacitance retention compared to hybrid carbon fibers without the conductive core. Solid-state FMSCs were assembled using the core-sheath fibers as electrodes, which concurrently possess high length capacitance (12.8 mF cm−1) and volumetric capacitance (27 F cm−3), showing an energy density of 3.75 mWh cm–3 and a power density of 612 mW cm–3. Furthermore, multiple FMSCs can be easily assembled into flexible energy storage units with expanded voltage and current windows, demonstrating good potentials for practical applications in WEDs.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Zhai, Shengli
Karahan, H. Enis
Wei, Li
Chen, Xuncai
Zhou, Zheng
Wang, Xin
Chen, Yuan
format Article
author Zhai, Shengli
Karahan, H. Enis
Wei, Li
Chen, Xuncai
Zhou, Zheng
Wang, Xin
Chen, Yuan
author_sort Zhai, Shengli
title Hydrothermal assembly of micro-nano-integrated core-sheath carbon fibers for high-performance all-carbon micro-supercapacitors
title_short Hydrothermal assembly of micro-nano-integrated core-sheath carbon fibers for high-performance all-carbon micro-supercapacitors
title_full Hydrothermal assembly of micro-nano-integrated core-sheath carbon fibers for high-performance all-carbon micro-supercapacitors
title_fullStr Hydrothermal assembly of micro-nano-integrated core-sheath carbon fibers for high-performance all-carbon micro-supercapacitors
title_full_unstemmed Hydrothermal assembly of micro-nano-integrated core-sheath carbon fibers for high-performance all-carbon micro-supercapacitors
title_sort hydrothermal assembly of micro-nano-integrated core-sheath carbon fibers for high-performance all-carbon micro-supercapacitors
publishDate 2017
url https://hdl.handle.net/10356/83436
http://hdl.handle.net/10220/42589
_version_ 1787136697295699968