A three-dimensional graphene framework-enabled high-performance stretchable asymmetric supercapacitor

The construction of flexible and stretchable supercapacitors with high energy density and superior stability is critical for modern wearable electronics but still remains considerably challenging. Herein we develop an ultrahigh-performance stretchable asymmetric supercapacitor (SASC) by using electr...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2018, Vol.6 (4), p.182-188
Main Authors: Li, Ke, Huang, Yanshan, Liu, Jingjing, Sarfraz, Mansoor, Agboola, Phillips O, Shakir, Imran, Xu, Yuxi
Format: Article
Language:English
Subjects:
Capacitance
Composite materials
Durability
Electrochemistry
Energy
Flux density
Graphene
Light emitting diodes
Liquid crystal displays
Lithium
Microcontrollers
Polyanilines
Retention
Stability
Stretching
Supercapacitors
Three dimensional composites
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Summary:The construction of flexible and stretchable supercapacitors with high energy density and superior stability is critical for modern wearable electronics but still remains considerably challenging. Herein we develop an ultrahigh-performance stretchable asymmetric supercapacitor (SASC) by using electrically and mechanically robust three-dimensional graphene frameworks as electrodes for the first time, in which three-dimensional graphene and a deliberately designed three-dimensional graphene/polyaniline composite are employed as the anode and cathode, respectively. The newly developed SASCs show the highest energy density of 77.8 W h kg −1 among all reported stretchable supercapacitors, and also deliver exceptional cycling stability with 95.6% capacitance retention after 10 000 charge-discharge cycles and excellent electrochemical durability with 91.2% capacitance retention after 100 stretching cycles at a large strain of 100%. The practicability of our SASC has been further demonstrated by efficiently powering a light-emitting diode indicator (1.8 V, 10 mA) under repeated stretching of a SASC mounted on a finger. Moreover, by connecting three SASCs in series, the tandem device can even drive an STC89C51RC microcontroller-based complex circuit (5.0 V) to light a liquid crystal display. Three-dimensional graphene frameworks enable the development of stretchable asymmetric supercapacitors with a record high energy density of 77.8 W h kg −1 , and also excellent stretchability and superior cycling stability.
ISSN:2050-7488
2050-7496
DOI:10.1039/c7ta09041b