Investigations on Electrochemical Activity of Polycarbazole/Cadmium Sulfide/Hematite Iron (III) Oxide (PCz/CdS/α-Fe2O3) Nanocomposite Electrode for Supercapacitors

IF 3.9 3区化学 Q2 POLYMER SCIENCE

Journal of Polymer Science Pub Date : 2024-10-10 DOI:10.1002/pol.20240415

Roshini Gunasekaran, Julie Charles, Satheesh Kumar Gopal

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引用次数: 0

Abstract

A novel ternary polycarbazole/cadmium sulfide/hematite iron (III) oxide (PCz/CdS/α-Fe₂O₃) nanocomposite was synthesized through in situ chemical polymerization method. The phase structure and morphology of PCz, PCz/CdS, PCz/α-Fe₂O₃, and PCz/CdS/α-Fe₂O₃ were analyzed using XRD and FESEM techniques. From HR-TEM study, particle size of PCz/CdS/α-Fe₂O₃ nanocomposite was found to be 68.09 nm. The chemical composition and the binding energy of the elements present in PCz/CdS/α-Fe₂O₃ nanocomposite were examined through XPS. BET studies revealed the mesoporous nature of PCz/CdS/α-Fe₂O₃ with a large surface area (35.51 m² g⁻¹) compared to PCz/α-Fe₂O₃ (21.52 m² g⁻¹) and PCz/CdS (7.47 m² g⁻¹) nanocomposites. Cyclic voltammetric studies revealed the highest specific capacitance (634.14 Fg⁻¹) of ternary PCz/CdS/α-Fe₂O₃ electrode in KOH electrolyte in comparison to H₂SO₄ (49.44 Fg⁻¹) and Na₂SO₄ (79.94 Fg⁻¹) electrolytes at a scan rate of 3 mVs⁻¹. Cyclic stability test indicated a high capacitive retentivity of PCz/CdS/α-Fe₂O₃ (97%) electrode than PCz/CdS (90%) and PCz/α-Fe₂O₃ (93%) electrodes after completion of 2000 cycles. From EIS, PCz/CdS/α-Fe₂O₃ displayed a low ESR value (1.35 Ω) than the binary electrodes; the value increased slightly after the cyclic stability analysis. All these indicate the effectiveness of PCz/CdS/α-Fe₂O₃ as a suitable electrode for supercapacitors.

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来源期刊

Journal of Polymer Science POLYMER SCIENCE-

CiteScore

6.30

自引率

5.90%

发文量

264

期刊介绍： Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology.