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Interfacial growth of free-standing PANI films: toward high-performance all-polymer supercapacitors.
- Source :
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Chemical science [Chem Sci] 2020 Dec 08; Vol. 12 (5), pp. 1783-1790. Date of Electronic Publication: 2020 Dec 08. - Publication Year :
- 2020
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Abstract
- Along with high power capability and energy density, long cycle life is regarded an essential performance requirement for energy storage devices. The rapid capacitance decline of conducting polymer-based electrodes remains a major technical challenge and precludes their practical applications in supercapacitors. In this work, a polyaniline (PANI) network is synthesized via interfacial Buchwald-Hartwig polymerization for the first time, facilitating the construction of covalently connected PANI networks by ligand-promoted C-N bond formation. Particularly, the interfacial synthesis and subsequent gas release from pre-anchored protecting groups allow bottom-up and efficient access to porous cross-linked PANI (PCL-PANI) films that are free-standing and solvent-resistant. Upon assembling into supercapacitors, the PCL-PANI material enables an unprecedent long-term charge-discharge cycling performance (>18 000 times) without clear capacitance loss for an additive-free pseudocapacitive system. In addition, this synthesis affords electrodes entirely consisting of conducting polymers, yielding highly reversible gravimetric capacitance at 435 F g <subscript>electrode</subscript> <superscript>-1</superscript> in a two-electrode system, and a high gravimetric energy of 12.5 W h kg <subscript>electrode</subscript> <superscript>-1</superscript> while delivering an outstanding power density of 16 000 W kg <subscript>electrode</subscript> <superscript>-1</superscript> , which is 10-fold higher than those of conventional linear PANI composite supercapacitors. This synthetic approach represents a novel and versatile strategy to generate additive/binder-free and high-performance conducting thin-films for energy storage.<br />Competing Interests: There are no conflicts to declare.<br /> (This journal is © The Royal Society of Chemistry.)
Details
- Language :
- English
- ISSN :
- 2041-6520
- Volume :
- 12
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Chemical science
- Publication Type :
- Academic Journal
- Accession number :
- 34163940
- Full Text :
- https://doi.org/10.1039/d0sc05061j