Enhanced electrochemical performance of graphene/La2BMnO6/PPy composites for supercapacitor applications.
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| Title: | Enhanced electrochemical performance of graphene/La2BMnO6/PPy composites for supercapacitor applications. |
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| Authors: | Kumar, Amod1 (AUTHOR), Das, Tupan1 (AUTHOR), Dev, Amar1 (AUTHOR), Kashyap, Yashvant2 (AUTHOR), Pandey, Rakesh Kumar2 (AUTHOR), Kumar, Pawan1,3 (AUTHOR) pawankumarmgcub@gmail.com, Kar, Manoranjan1 (AUTHOR) mano@iitp.ac.in |
| Source: | Ceramics International. May2026:Part B, Vol. 52 Issue 12, p19542-19554. 13p. |
| Subjects: | Supercapacitors, Energy storage, Polypyrrole, Graphene, X-ray powder diffraction, Electrochemical analysis, Rietveld refinement, Perovskite analysis |
| Abstract: | La 2 BMnO 6 (B = Co, Ni, and Cu) double perovskite are interesting candidates for energy storage applications due to their abundant nature and high energy density. X-ray diffraction (XRD) was utilized to examine the La 2 BMnO 6 nanoparticles. FullProf software was used to assess phase purity and structural features using Rietveld refinement. Rietveld-refined XRD patterns revealed that La 2 BMnO 6 nanoparticles form in a single-phase monoclinic structure with the space group P2 1 /n. Graphene/Polypyrrole/La 2 BMnO 6 composites are employed in supercapacitor electrodes due to their high conductivity, pseudocapacitance, and structural stability, resulting in improved energy storage performance. Graphene/La 2 CuMnO 6 /Polypyrrole outperformed other samples in electrochemical performance, with a specific capacitance of 65 F/g at 100 mV/s and lower intrinsic resistance in a 3 M potassium hydroxide electrolyte. Over 1000 charge-discharge cycles at a current density of 500 mV/s, La 2 CuMnO 6 composites retained around 93% of their initial capacitance, exceeding La 2 CoMnO 6 composites (∼88%) and nearly approaching the performance of La 2 NiMnO 6 composites (∼91%). The performance of the constructed single-electrode supercapacitors was equivalent to, and in some cases exceeded, that of traditional glassy carbon electrodes. These findings imply that integrating different conductive fillers at very low concentrations can greatly improve electrode materials' durability and electrochemical performance. Therefore, this study highlights La 2 CuMnO 6 's potential for high-performance supercapacitor applications by utilizing optimized perovskite-based composites. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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