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Breathable 3D Supercapacitors Based on Activated Carbon Fiber Veil
Author(s) -
Shin Dongwoo,
Shen Caiwei,
Sanghadasa Mohan,
Lin Liwei
Publication year - 2018
Publication title -
advanced materials technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.184
H-Index - 42
ISSN - 2365-709X
DOI - 10.1002/admt.201800209
Subject(s) - supercapacitor , materials science , capacitance , energy storage , power density , electrode , wearable technology , nanotechnology , wearable computer , composite material , power (physics) , computer science , chemistry , embedded system , physics , quantum mechanics
For supercapacitors to become truly wearable to power various portable electronics, they must not only possess high power and energy density with long cycle life, but also provide comfort and durability. Here, a facile method of fabricating substrate‐free and freestanding breathable 3D supercapacitors using veil‐based electrodes with activated carbon fibers (ACFs) is reported. The conductive and high porous electrodes are lightweight, breathable, flexible, foldable, and tailorable with achieved high energy density of 5.52 Wh kg −1 and >86.6% capacitance retention over 10 000 charge–recharge cycles under various mechanical deformations such has folding, cutting, and compression. Different from the existing energy storage systems, the mechanically reliable supercapacitors can be integrated into parts of garments that are susceptible to a combination of anomalous mechanical deformations such as the inner elbow for 3D wearable energy storage applications.