Double-porous polyaniline-based cryogels with carbon nanofibers for supercapacitors

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F24%3A00585476" target="_blank" >RIV/61389013:_____/24:00585476 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/24:10480393 RIV/60461373:22310/24:43931042

Result on the web

<a href="https://pubs.acs.org/doi/10.1021/acsaem.4c00120" target="_blank" >https://pubs.acs.org/doi/10.1021/acsaem.4c00120</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acsaem.4c00120" target="_blank" >10.1021/acsaem.4c00120</a>

Result language

angličtina

Original language name

Double-porous polyaniline-based cryogels with carbon nanofibers for supercapacitors

Original language description

Polyaniline-poly(N-vinylpyrrolidone) cryogels/aerogels with carbon nanofibers (PANI–CNF–PVP) were prepared by oxidative cryopolymerization of aniline in water:isopropanol medium in the presence of various amounts of dispersed carbon nanofibers (CNF, 0.05–2.5 mg mL–1). Scanning electron microscopy showed that all prepared PANI–CNF–PVP and PANI–PVP aerogels have double-porous morphology, which is represented by macropores (5–35 μm), constituting the main three-dimensional network of the materials, and smaller pores (≈200 nm − 3 μm) in the macropore walls. The incorporation of CNF into PANI–CNF–PVP aerogels was visualized by scanning and transmission electron microscopy and additionally supported by X-ray photoelectron spectroscopy. Surface area of the aerogels was found to be ≈13–25 m2 g–1. Based on full decomposition temperatures determined by TGA, PANI–CNF–PVP aerogels had better thermal stability (792 °C, 2.5 mg mL–1 of CNF) compared to PANI–PVP (750 °C). Starting from the lowest used CNF content (0.05 mg mL–1), PANI–CNF–PVP aerogels demonstrated significantly higher gravimetric capacitance (≈3–6 times), compared to PANI–PVP aerogel, reaching 201 F g–1 (1 A g–1, 1 mg mL–1 of CNF), in the three-electrode setup. These data were supported by electrochemical impedance spectroscopy, showing lower charge transfer resistance for PANI–CNF–PVP aerogels, which decreased with an increasing CNF fraction. CNF-containing aerogels also showed enhanced cycling stability. A two-electrode symmetrical supercapacitor was assembled using PANI–CNF–PVP aerogel (1 mg mL–1 CNF) as the active electrode material. The device reached a gravimetric capacitance of 213 F g–1 (0.5 A g–1) with energy and power densities of 30 Wh kg–1 and 1000 W kg–1, respectively, and showed 95% cycling stability after 1000 cycles. The performance of this supercapacitor is comparable or often exceeds that of previously reported electrode materials, based on conducting polymers and carbon derivatives. Therefore, the prepared PANI–CNF–PVP aerogels are the promising materials for energy storage.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10404 - Polymer science

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

ACS Applied Energy Materials

ISSN

2574-0962

e-ISSN

—

Volume of the periodical

7

Issue of the periodical within the volume

8

Country of publishing house

US - UNITED STATES

Number of pages

12

Pages from-to

3354-3365

UT code for WoS article

001202403500001

EID of the result in the Scopus database

2-s2.0-85190846160