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Harvesting electrical energy from carbon nanotube yarn twist

Title
Harvesting electrical energy from carbon nanotube yarn twist
Authors
Kim, Shi HyeongHaines, Carter S.Li, NaKim, Keon JungMun, Tae JinChoi, ChangsoonDi, JiangtaoOh, Young JunOviedo, Juan PabloBykova, JuliaFang, ShaoliJiang, NanLiu, ZunfengWang, RunKumar, PrashantQiao, RuiPriya, ShashankCho, KyeongjaeKim, MoonLucas, Matthew StevenDrummy, Lawrence F.Maruyama, BenjiLee, Dong YounLepro, XavierGao, EnlaiAlbarq, DawoodOvalle-Robles, RaquelKim, Seon JeongBaughman, Ray H.
DGIST Authors
Choi, Changsoon
Issue Date
2017-08
Citation
Science, 357(6353), 773-778
Type
Article
Article Type
Article
Keywords
DIFFERENTIAL CAPACITANCEPYROLYTIC-GRAPHITEARTIFICIAL MUSCLESMECHANICAL ENERGYELECTRODESSYSTEMDRIVENSHEETS
ISSN
0036-8075
Abstract
Mechanical energy harvesters are needed for diverse applications, including self-powered wireless sensors, structural and human health monitoring systems, and the extraction of energy from ocean waves. We report carbon nanotube yarn harvesters that electrochemically convert tensile or torsional mechanical energy into electrical energy without requiring an external bias voltage. Stretching coiled yarns generated 250 watts per kilogram of peak electrical power when cycled up to 30 hertz, as well as up to 41.2 joules per kilogram of electrical energy per mechanical cycle, when normalized to harvester yarn weight. These energy harvesters were used in the ocean to harvest wave energy, combined with thermally driven artificial muscles to convert temperature fluctuations to electrical energy, sewn into textiles for use as self-powered respiration sensors, and used to power a light-emitting diode and to charge a storage capacitor.
URI
http://hdl.handle.net/20.500.11750/6526
DOI
10.1126/science.aam8771
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
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Collection:
Smart Textile Convergence Research Group1. Journal Articles


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