Stretchable, Weavable Coiled Carbon Nanotube/MnO2/Polymer Fiber Solid-State Supercapacitors

Title
Stretchable, Weavable Coiled Carbon Nanotube/MnO2/Polymer Fiber Solid-State Supercapacitors
Authors
김선정
Keywords
YARN SUPERCAPACITORS; ENERGY-STORAGE; NANOTUBE YARN; TEXTILES; WIRE; CONVERSION; BATTERIES; CAPACITOR; MUSCLES
Issue Date
2015-03
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v. 5, NO 9387, Page. 1-6
Abstract
Fiber and yarn supercapacitors that are elastomerically deformable without performance loss are sought for such applications as power sources for wearable electronics, micro-devices, and implantable medical devices. Previously reported yarn and fiber supercapacitors are expensive to fabricate, difficult to upscale, or non-stretchable, which limits possible use. The elastomeric electrodes of the present solid-state supercapacitors are made by using giant inserted twist to coil a nylon sewing thread that is helically wrapped with a carbon nanotube sheet, and then electrochemically depositing pseudocapacitive MnO2 nanofibers. These solid-state supercapacitors decrease capacitance by less than 15% when reversibly stretched by 150% in the fiber direction, and largely retain capacitance while being cyclically stretched during charge and discharge. The maximum linear and areal capacitances (based on active materials) and areal energy storage and power densities (based on overall supercapacitor dimensions) are high (5.4 mF/cm, 40.9 mF/cm(2), 2.6 mu Wh/cm(2) and 66.9 mu W/cm(2), respectively), despite the engineered superelasticity of the fiber supercapacitor. Retention of supercapacitor performance during large strain (50%) elastic deformation is demonstrated for supercapacitors incorporated into the wristband of a glove.
URI
http://www.nature.com/articles/srep09387http://hdl.handle.net/20.500.11754/22740
ISSN
2045-2322
DOI
http://dx.doi.org/10.1038/srep09387
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ETC
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