Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Rational-designed hybrid aerogels for ultra-flyweight electrochemical energy storage

Lu, Mingxia, Liu, Shanshan, Chen, Jing, Zhang, Xia, Zhang, Jingchao, Li, Zhe and Hou, Bo 2020. Rational-designed hybrid aerogels for ultra-flyweight electrochemical energy storage. Journal of Physical Chemistry C 124 (29) , pp. 15688-15697. 10.1021/acs.jpcc.0c02217
Item availability restricted.

[img] PDF - Accepted Post-Print Version
Restricted to Repository staff only until 29 June 2021 due to copyright restrictions.

Download (1MB)


Hybridising 2D materials into 3D aerogels have attracted considerable interest in ultralight electrochemical energy storage devices. However, to optimise the device structure for more efficient charge storage and transport, a better understanding of the ratio-dependent hybridisation process and interface charge transfer mechanisms are highly required. Here, we perform a comprehensive study to elucidate the fundamental process during the reduced graphene oxide (rGO) and carbon nanotube (CNT) hybridisation, which enabled the fabrication of a rational-designed rGO/CNT hybrid aerogel (GCA) with a record energy storage performance beyond previously reported works. Based on spectroscopy and microscopy analysis, we found the hydrophilic and hydrophobic transition of GO which eliminates the surface-functionalised oxygen-containing moieties, is the origin of the π-π stacking hybridisation between rGO and CNTs. Moreover, we found the different amount of CNTs ‘solder’ in-between rGO sheets can offer GCA distinct mechanical elasticity, ion diffusion resistance and specific capacitance. As illustrated in the electrochemical impedance spectroscopy (EIS) and charge/discharge analysis, we found GCA 2-2 (rGO:CNT=2:2) display the best gravimetric capacitance of 117 F∙g-1 at a discharge current density of 1 A∙g-1, which help us to fabricate an ultra-flyweight supercapacitor with a large energy density of 3.53 Wh∙kg-1 at a power density of 283.4 W∙kg-1.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: American Chemical Society
ISSN: 1932-7447
Date of First Compliant Deposit: 13 July 2020
Date of Acceptance: 29 June 2020
Last Modified: 27 Nov 2020 06:40

Actions (repository staff only)

Edit Item Edit Item


Downloads per month over past year

View more statistics