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Pregled bibliografske jedinice broj: 836590

Časopis

Autori: Sačer, Denis; Čapeta, Davor; Šrut Rakić, Iva; Peter, Robert; Petravić, Mladen; Kraljić Roković, Marijana
Naslov: Tailoring polypyrrole supercapacitive properties by intercalation of graphene oxide within the layer
Izvornik: Electrochimica acta (0013-4686) 193 (2016); 311-320
Vrsta rada: članak
Ključne riječi: chronoamperometry ; cyclic voltammetry ; graphene oxide ; polypyrrole ; supercapacitors
Sažetak:
In this work polypyrrole was prepared using different solutions of graphene oxide as the supporting electrolyte. Two different samples of graphene oxide (GO1 and GO2) were prepared from different graphite precursors. The obtained samples were characterised by means of scanning electron microscope (SEM), atomic force microscope (AFM) and X-ray photoemission spectroscopy (XPS), which showed a significant difference between the two structures considering their morphology characteristics, sheet size and type of oxygen functionalities. However, all the graphene oxide samples used in this work contain appropriate amounts of single bondCOO− groups essential for compensation of positive charge generated at the polymer backbone. The polymer layers were prepared by cyclic voltammetry and chronoamperometry methods from GO1 (PPy/GO1), GO2 (PPy/GO2) and dialysed GO2 (PPy/D-GO2) supporting electrolyte solutions. The examinations were carried out in appropriate graphene oxide or Na2SO4 solutions. The results obtained reveal that the layers are electrochemically active in graphene oxide solution. However, the polymer response is significantly improved in Na2SO4 solution. Electrochemical quartz crystal nanobalance (EQCN) measurements suggest that graphene oxide is involved in the polypyrrole redox reaction while the morphology characteristics suggest that graphene oxide is incorporated within the polymer layer. The properties of the layer depend on the type of graphene oxide solution used during the synthesis. The specific capacitance value of the PPy/D-GO2 layer prepared by the chronoamperometry method was found to be dependent on the deposited material mass and for 1.20 to 0.38 μg of polypyrrole it ranged between 149.51 and 221.76 F g−1, respectively.
Projekt / tema: HRZZ-IP-2013-11-8825
Izvorni jezik: ENG
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
Kemija,Kemijsko inženjerstvo
URL Internet adrese: http://www.sciencedirect.com/science/article/pii/S0013468616303346
https://doi.org/10.1016/j.electacta.2016.02.055
Broj citata:
Altmetric:
DOI: 10.1016/j.electacta.2016.02.055
URL cjelovitog teksta:
Google Scholar: Tailoring polypyrrole supercapacitive properties by intercalation of graphene oxide within the layer
Upisao u CROSBI: Marijana Kraljić Roković (mkralj@marie.fkit.hr), 4. Lis. 2016. u 14:50 sati



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