Carbonization of MOF-5/Polyaniline Composites to N,O-Doped Carbon/ZnO/ZnS and N,O-Doped Carbon/ZnO Composites with High Specific Capacitance, Specific Surface Area and Electrical Conductivity

Composites of carbons with metal oxides and metal sulfides have attracted a lot of interest as materials for energy conversion and storage applications. Herein, we report on novel N,O-doped carbon/ZnO/ZnS and N,O-doped carbon/ZnO composites (generally named C-(MOF-5/PANI)), synthesized by the carbon...

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Bibliographic Details
Published in:Materials 2023-01, Vol.16 (3), p.1018
Main Authors: Savić, Marjetka, Janošević Ležaić, Aleksandra, Gavrilov, Nemanja, Pašti, Igor, Nedić Vasiljević, Bojana, Krstić, Jugoslav, Ćirić-Marjanović, Gordana
Format: Article
Language:English
Subjects:
Acids
Batteries
Capacitance
Capacitors
Carbon
Carbonization
Composite materials
Composition
Electric properties
Electrical conductivity
Electrical resistivity
Electrochemical analysis
Electrode materials
Electrodes
Energy conversion
Energy storage
Etching
Metal oxides
Metal sulfides
Metal-organic frameworks
Molecular structure
Polyanilines
Polymers
Surface area
Wurtzite
Zinc oxide
Zinc sulfide
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Summary:Composites of carbons with metal oxides and metal sulfides have attracted a lot of interest as materials for energy conversion and storage applications. Herein, we report on novel N,O-doped carbon/ZnO/ZnS and N,O-doped carbon/ZnO composites (generally named C-(MOF-5/PANI)), synthesized by the carbonization of metal-organic framework MOF-5/polyaniline (PANI) composites. The produced C-(MOF-5/PANI)s are comprehensively characterized in terms of composition, molecular and crystalline structure, morphology, electrical conductivity, surface area, and electrochemical behavior. The composition and properties of C-(MOF-5/PANI) composites are dictated by the composition of MOF-5/PANI precursors and the form of PANI (conducting emeraldine salt (ES) or nonconducting emeraldine base). The ZnS phase is formed only with the PANI-ES form due to S-containing counter-ions. XRPD revealed that ZnO and ZnS existed as pure wurtzite crystalline phases. PANI and MOF-5 acted synergistically to produce C-(MOF-5/PANI)s with high S (up to 609 m g ), electrical conductivity (up to 0.24 S cm ), and specific capacitance, C (up to 238.2 F g at 10 mV s ). Values of C commensurated with N content in C-(MOF-5/PANI) composites (1-10 wt.%) and overcame C of carbonized individual components PANI and MOF-5. By acid etching treatment of C-(MOF-5/PANI), S and C increased to 1148 m g and 341 F g , respectively. The developed composites represent promising electrode materials for supercapacitors.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma16031018