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Superelastic Hybrid CNT/Graphene Fibers for Wearable Energy Storage
Author(s) -
Lu Zan,
Foroughi Javad,
Wang Caiyun,
Long Hairu,
Wallace Gordon G.
Publication year - 2018
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201702047
Subject(s) - materials science , supercapacitor , graphene , capacitance , carbon nanotube , fabrication , nanotechnology , fiber , energy storage , polyaniline , coating , composite material , polymer , electrode , power (physics) , medicine , chemistry , alternative medicine , physics , pathology , quantum mechanics , polymerization
The demands for wearable technologies continue to grow and novel approaches for powering these devices are being enabled by the advent of new electromaterials and novel fabrication strategies. Herein, a novel approach is reported to develop superelastic wet‐spun hybrid carbon nanotube graphene fibers followed by electrodeposition of polyaniline to achieve a high‐performance fiber‐based supercapacitor. It is found that the specific capacitance of hybrid carbon nanotube (CNT)/graphene fiber is enhanced up to ≈39% using a graphene to CNT fiber ratio of 1:3. Fabrication of spring‐like coiled fiber coated with an elastic polymer shows an extraordinary elasticity capable of 800% strain while affording a specific capacitance of ≈138 F g −1 . The elastic rubber coating enables extreme stretchability and enabling cycles with up to 500% strain for thousands of cycles with no significant change in its performance. Multiple supercapacitors can be easily assembled in series or parallel to meet specific energy and power needs.