Synthesis and electrochemical characterization of APS/FeCl3-PPy@Co2O3 nanocomposites for supercapacitors
Abstract In this work, we analysed the enhancement of the specific capacitance (Cs) of Co2O3 through the formation of nanocomposites (NCs) with conductive polypyrrole (PPy), presenting a practical approach for developing supercapacitor materials. In this research, PPy@Co2O3 NCs were synthesised usin...
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Springer
2025-07-01
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| Online Access: | https://doi.org/10.1007/s44291-025-00094-7 |
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| author | Sagar Kute Munish Pandey Manohar Zate |
| author_facet | Sagar Kute Munish Pandey Manohar Zate |
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| description | Abstract In this work, we analysed the enhancement of the specific capacitance (Cs) of Co2O3 through the formation of nanocomposites (NCs) with conductive polypyrrole (PPy), presenting a practical approach for developing supercapacitor materials. In this research, PPy@Co2O3 NCs were synthesised using ammonium persulfate (APS) and ferric chloride (FeCl3) as oxidants. They were characterised through structural and electrochemical studies involving UV-Vis, FTIR, BET, XRD, and FE-SEM-EDX analyses. XRD analysis revealed the amorphous nature of PPy and the crystalline nature of Co2O3, while FE-SEM analysis demonstrated the uniform dispersion of Co2O3 within the polymer matrix. Cyclic voltammetry (CV) analysis shows the superior pseudocapacitive performance of NCs, achieving Cs of 118 F/g (Co2O3), 3,244 F/g (APS-PPy@Co2O3), and 438 F/g (FeCl3-PPy@Co2O3) at low scan rates (2–5 mV/s). Combining conductive polymers (APS-PPy, FeCl3-PPy) with Co2O3 improves charge transfer kinetics. This integration reduces diffusion limitations, as shown by the maintained quasi-rectangular CV patterns. This integration effectively mitigates diffusion limitations, as evidenced by the well-maintained quasi-rectangular cyclic voltammetry (CV) patterns and strong rate capabilities (90.7% capacitance retention for APS-PPy@Co2O3 at 20 mV/s). The hybrid charge storage systems that incorporate Faradaic redox processes from Co2+/Co3+ transitions, along with electric double-layer effects, are greatly improved by hierarchical porosity and polymer-induced conductivity, positioning these NCs as strong candidates for high-energy supercapacitors. Graphical abstract |
| format | Article |
| id | doaj-art-74de8e9aefdd4ab09e6ec82d8527bf7a |
| institution | DOAJ |
| issn | 2948-1600 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Springer |
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| series | Discover Electronics |
| spelling | doaj-art-74de8e9aefdd4ab09e6ec82d8527bf7a2025-08-20T03:04:35ZengSpringerDiscover Electronics2948-16002025-07-012112110.1007/s44291-025-00094-7Synthesis and electrochemical characterization of APS/FeCl3-PPy@Co2O3 nanocomposites for supercapacitorsSagar Kute0Munish Pandey1Manohar Zate2Department of Physics, K. M. Agrawal CollegeDepartment of Physics, K. M. Agrawal CollegeDepartment of Physics, SVKT Arts, commerce & Science CollegeAbstract In this work, we analysed the enhancement of the specific capacitance (Cs) of Co2O3 through the formation of nanocomposites (NCs) with conductive polypyrrole (PPy), presenting a practical approach for developing supercapacitor materials. In this research, PPy@Co2O3 NCs were synthesised using ammonium persulfate (APS) and ferric chloride (FeCl3) as oxidants. They were characterised through structural and electrochemical studies involving UV-Vis, FTIR, BET, XRD, and FE-SEM-EDX analyses. XRD analysis revealed the amorphous nature of PPy and the crystalline nature of Co2O3, while FE-SEM analysis demonstrated the uniform dispersion of Co2O3 within the polymer matrix. Cyclic voltammetry (CV) analysis shows the superior pseudocapacitive performance of NCs, achieving Cs of 118 F/g (Co2O3), 3,244 F/g (APS-PPy@Co2O3), and 438 F/g (FeCl3-PPy@Co2O3) at low scan rates (2–5 mV/s). Combining conductive polymers (APS-PPy, FeCl3-PPy) with Co2O3 improves charge transfer kinetics. This integration reduces diffusion limitations, as shown by the maintained quasi-rectangular CV patterns. This integration effectively mitigates diffusion limitations, as evidenced by the well-maintained quasi-rectangular cyclic voltammetry (CV) patterns and strong rate capabilities (90.7% capacitance retention for APS-PPy@Co2O3 at 20 mV/s). The hybrid charge storage systems that incorporate Faradaic redox processes from Co2+/Co3+ transitions, along with electric double-layer effects, are greatly improved by hierarchical porosity and polymer-induced conductivity, positioning these NCs as strong candidates for high-energy supercapacitors. Graphical abstracthttps://doi.org/10.1007/s44291-025-00094-7Cobalt oxide nanomaterialsPolypyrrole (PPy)Cyclic voltammetrySpecific capacitance optimization |
| spellingShingle | Sagar Kute Munish Pandey Manohar Zate Synthesis and electrochemical characterization of APS/FeCl3-PPy@Co2O3 nanocomposites for supercapacitors Discover Electronics Cobalt oxide nanomaterials Polypyrrole (PPy) Cyclic voltammetry Specific capacitance optimization |
| title | Synthesis and electrochemical characterization of APS/FeCl3-PPy@Co2O3 nanocomposites for supercapacitors |
| title_full | Synthesis and electrochemical characterization of APS/FeCl3-PPy@Co2O3 nanocomposites for supercapacitors |
| title_fullStr | Synthesis and electrochemical characterization of APS/FeCl3-PPy@Co2O3 nanocomposites for supercapacitors |
| title_full_unstemmed | Synthesis and electrochemical characterization of APS/FeCl3-PPy@Co2O3 nanocomposites for supercapacitors |
| title_short | Synthesis and electrochemical characterization of APS/FeCl3-PPy@Co2O3 nanocomposites for supercapacitors |
| title_sort | synthesis and electrochemical characterization of aps fecl3 ppy co2o3 nanocomposites for supercapacitors |
| topic | Cobalt oxide nanomaterials Polypyrrole (PPy) Cyclic voltammetry Specific capacitance optimization |
| url | https://doi.org/10.1007/s44291-025-00094-7 |
| work_keys_str_mv | AT sagarkute synthesisandelectrochemicalcharacterizationofapsfecl3ppyco2o3nanocompositesforsupercapacitors AT munishpandey synthesisandelectrochemicalcharacterizationofapsfecl3ppyco2o3nanocompositesforsupercapacitors AT manoharzate synthesisandelectrochemicalcharacterizationofapsfecl3ppyco2o3nanocompositesforsupercapacitors |