ItemArticle

Amide-enriched pod-based carbon nanospheres for enhancing supercapacitor performance: A value-added approach for solid state supercapacitors

Title
Amide-enriched pod-based carbon nanospheres for enhancing supercapacitor performance: A value-added approach for solid state supercapacitors
Creator
Soman, Gowri; Sayeed, Kaifee; Pandey, Kavita; Sirimahachai, Uraiwan; Hegde, Gurumurthy
Description
The present work involves the fabrication of symmetric solid-state supercapacitors (SSSCs) using amide-functionalized carbon nanospheres (CNS) derived from Magnolia champaca pods, a bio-waste material. The pods were carbonized at temperatures ranging from 400 C to 1000 C, with CNS at 800 C (MC800) showing best electrochemical performance. The synthesized materials, i.e., MC400, MC600, MC800, MC1000, were characterized by techniques such as FESEM, HR-TEM, FTIR, XRD, Raman spectroscopy, and BET. Amide functionalization, achieved through the use of 2,3,4-trifluoroaniline (TFA), enhanced charge storage capacity by improving ion transport and surface interaction, resulting in the functionalized CNS labeled as MC800/COOH-TFA. The electrochemical investigation of the CNS was studied via techniques such as cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS). The functionalization led to two-fold increase in specific capacitance from 243 Fg?1 to 410 Fg?1 at a current density of 0.25Ag?1 in 3 M KOH. The SSSCs was fabricated using MC800/COOH-TFA with a PVA-KOH gel electrolyte demonstrating a good areal capacitance of 40 mFcm?2 at 1.0 mAcm?2. Moreover, the device exhibited excellent energy density of 5.54 ?Whcm?2 and cycle stability, retaining 71.75 % of its capacitance after 10,000 charge-discharge cycles. The response time of the functionalized sample has been reduced to 2.31 s (MC800/COOH-TFA) from 4.73 s (MC800). These results highlight the potential of amide functionalized CNS in producing efficient, sustainable energy storage devices with improved performance. 2025 Elsevier Ltd
Source
Journal of Energy Storage;Volume;121;Issue;;Article No.;116590;
Date
01-01-2025
Publisher
Elsevier Ltd
Subject
Areal capacitance; Biomass; Energy density; Power density; Solid-state supercapacitor
Coverage
Soman G., Department of Chemistry, Christ University, Bangalore, 560029, India, Centre for Advanced Research and Development (CARD), Christ University, Bangalore, 560029, India; Sayeed K., Centre for Nano and Soft Matter Sciences, Karnataka, Bengaluru, 562162, India, Manipal Academy of Higher Education, Karnataka, Manipal, 576104, India; Pandey K., Centre for Nano and Soft Matter Sciences, Karnataka, Bengaluru, 562162, India; Sirimahachai U., Center of Excellence for Innovation in Chemistry, Division of Physical Science, Faculty of Science, Prince of Songkla University, Songkhla, Hat Yai, 90110, Thailand; Hegde G., Department of Chemistry, Christ University, Bangalore, 560029, India, Centre for Advanced Research and Development (CARD), Christ University, Bangalore, 560029, India
Rights
Restricted Access; Hardcopy may be available in the library
Relation
ISSN: 2352152X;
Format
online
Language
English
Type
Article

Citation

Soman, Gowri; Sayeed, Kaifee; Pandey, Kavita; Sirimahachai, Uraiwan; Hegde, Gurumurthy, “Amide-enriched pod-based carbon nanospheres for enhancing supercapacitor performance: A value-added approach for solid state supercapacitors,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 20, 2026, https://archives.christuniversity.in/items/show/22250.

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