Journal
ACS NANO
Volume 12, Issue 6, Pages 5888-5894Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.8b02055
Keywords
vanadium pentoxide; supercapacitor; polyaniline; hydrogel; conducting polymer
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Funding
- National Natural Science Foundation of China [21303144, 21705135, 21774104, 21503175]
- Fundamental Research Funds for the Central Universities [20720180066]
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Although challenging, fabrication of porous conducting polymeric materials with excellent electronic properties is crucial for many applications. We developed a fast in situ polymerization approach to pure polyaniline (PANI) hydrogels, with vanadium pentoxide hydrate nanowires as both the oxidant and sacrifice template. A network comprised of ultrathin PANI nanofibers was generated during the in situ polymerization, and the large aspect ratio of these PANT nanofibers allowed the formation of hydrogels at a low solid content of 1.03 wt %. Owing to the ultrathin fibril structure, PANI hydrogels functioning as a supercapacitor electrode display a high specific capacitance of 636 F g(-1), a rate capability, and good cycling stability (similar to 83% capacitance retention after 10,000 cycles). This method was also extended to polypyrrole and poly(3,4-ethylenedioxythiophene) hydrogels. This template polymerization method represents a rational strategy for design of conducing polymer networks, which can be readily integrated in high-performance devices or a further platform for functional composites.
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