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• W2178624114 startingPage "24150" @default.
• W2178624114 abstract "Polyaniline (PANI)-based electrodes are promising candidates for energy storage, but their cycle life remains poor. Recent work suggests that secondary interactions may enhance polyaniline's electrochemical stability and cycle life, but evidence to date is not conclusive. Here, we investigate spray-assisted layer-by-layer assemblies containing polyaniline nanofibers (PANI NFs) or conventional PANI and poly(acrylic acid) (PAA), which provides hydrogen bonding and electrostatic interactions. This spray-on approach may be suitable for the deposition of PANI onto a variety of surfaces. The effects of PANI type, PAA pH, and PAA molecular weight on the growth behavior, conductivity, and electrochemical performance are examined. It is shown that LbL films with PANI NFs, higher molecular weight PAA, and lower PAA pH yield the thickest films, whereas the thinnest films come from conventional PANI assembled under similar conditions. Electron microscopy imaging and density measurements show that LbL films containing PANI NFs are very porous, whereas those containing conventional PANI are very dense (0.28 vs 1.33 g/cm(3), respectively). The difference in density dramatically affects the electrochemical properties in terms of capacity and long-term cycling behavior. Upon extended cycling, PANI NFs alone rapidly lose their electrochemical activity. On the other hand, PANI NF-based LbL films exhibited somewhat enhanced stability, and PANI-based LbL films were exceptionally stable, maintaining 94.7% of their capacity after 1000 cycles when cycled up to 4.2 V vs Li/Li(+). These results show that secondary interactions from PAA enhance stability, as does the selection of PANI type and the electrode's density." @default.
• W2178624114 created "2016-06-24" @default.
• W2178624114 creator A5025703354 @default.
• W2178624114 creator A5030238247 @default.
• W2178624114 creator A5054735345 @default.
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• W2178624114 date "2015-10-22" @default.
• W2178624114 modified "2023-10-01" @default.
• W2178624114 title "Spray-On Polyaniline/Poly(acrylic acid) Electrodes with Enhanced Electrochemical Stability" @default.
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• W2178624114 doi "https://doi.org/10.1021/acsami.5b07459" @default.
• W2178624114 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26492360" @default.
• W2178624114 hasPublicationYear "2015" @default.
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