Journal
NANO ENERGY
Volume 17, Issue -, Pages 330-338Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2015.08.024
Keywords
Shape memory polymer; Supercapacitor; Carbon nanotube; Polyaniline
Categories
Funding
- National Natural Science Foundation of China [51402074]
- USA National Science Foundation [CMMI 1234641, CMMI 1435783]
- John A. Clark and Edward T. Crossan endowed chair professorship at the Rensselaer Polytechnic Institute
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1435783] Funding Source: National Science Foundation
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Smart energy storage materials, which not only store electrochemical energy but also exhibit sensitivity to environmental stimuli, can provide novel multi-functionalities. Here, we report a smart shape memory fiber supercapacitor constituted with a highly stretchable shape memory polymer nanocomposite fiber substrate, multi-walled carbon nanotubes (MWCNT) conductive layer and pesudocapacitive polyaniline layer. Using layer by layer (LBL) technology, we first produce a densely packed MWCNT layer that serves as a well-developed conductive current collector network. Then polyaniline, as an active material, was deposited on the surface of the MWCNT layer to further promote the energy storage capability of the fibers. After the infiltration of a polyvinyl alchohol (PVA) based polymer electrolyte into the porous MWCNT and PANI layer, conductivity of similar to 50 S/cm and stretchability of more than 400% are obtained. The resultant shape memory polymer supercapacitors (SMPFSCs) not only possess shape memory properties, but also exhibit outstanding energy storage performance, with the best pseudo-capacitance exceeding 427 F/cm(3). Such design strategies can also be extended to other polymer substrates, and could open the door to smart (multi-functional) supercapacitor technologies. (C) 2015 Elsevier Ltd. All rights reserved.
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