ItemArticle

Biowaste-derived hierarchical activated porous carbon with heteroatom-doping (N/S) for efficient symmetrical supercapacitors: A cow urine approach

Title
Biowaste-derived hierarchical activated porous carbon with heteroatom-doping (N/S) for efficient symmetrical supercapacitors: A cow urine approach
Creator
Reddy, Nandarapu Purushotham; Naik, Ramavath Janraj; Macherla, Nagaraju; Joseph, D. Paul; Jafri, R. Imran; Ahn, Chang Hoi; Siddiqui, Masoom Raza; Gonuguntla, Venkateswarlu; Park, Si-Hyun
Description
The continuous accumulation of biowaste in the environment over extended periods can pose considerable ecological challenges. Hence, the conversion of natural biowaste into value-added products is essential. In this study, for the first time, carbon materials derived from cow urine, an animal waste, were explored as potential electrode materials for supercapacitors (SCs). Hierarchical, highly porous carbonaceous materials containing heteroatoms such as N and S were synthesized using a simple, template-free pyrolysis method, involving the direct carbonization of cow urine as a single precursor at 700 C (CCUR-700) and pre-KOH activation of the resulting cow urine deposit pyrolyzed at 700 C (A-CCUR-700) with a removal of inherent mineral salts. The resulting porous carbon materials were then employed as electrode materials for SC applications. The A-CCUR-700 electrode, with its abundant surface functionalities, high specific surface area (2651.7 m2/g), high porosity, good conductivity, and self-doped heteroatoms (N and S), demonstrated better charge storage performance compared to the CCUR-700 electrode. Notably, a two-electrode symmetric SC assembled using the A-CCUR-700 electrode demonstrated an excellent specific capacitance of 165 F/g at a current density of 0.5 A g?1. Furthermore, the A-CCUR-700 symmetric SC device achieved a high energy and power density of 22.9 Wh/kg and 5100 W/kg, respectively, with a capacitance retention of 95.3 % over 5000 cycles. Overall, the results of this study suggest that the synthesis of functionalized carbonaceous materials from cow urine may open up new possibilities for producing inexpensive electrode materials for electrochemical value-added applications. 2025
Source
Journal of Energy Storage;Volume;115;Issue;;Article No.;115964;
Date
01-01-2025
Publisher
Elsevier Ltd
Subject
Activation; Cow urine; Heteroatom doping; Porous carbon; Symmetric supercapacitor; Template-free pyrolysis
Coverage
Reddy N.P., Department of Electronic Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongb, Gyeongsan, uk-38541, South Korea; Naik R.J., Department of Chemistry, Sri Venkateswara College, University of Delhi, Delhi, 110021, India; Macherla N., School of Mechanical Engineering, Yeungnam University, Gyeongsan, 38541, South Korea; Joseph D.P., Department of Physics, National Institute of Technology, Telangana State, Warangal, 506004, India; Jafri R.I., Department of Physics and Electronics, Christ University, Hosur Road, Bengaluru, 560029, India; Ahn C.H., Department of Electronic Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongb, Gyeongsan, uk-38541, South Korea; Siddiqui M.R., Chemistry Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia; Gonuguntla V., Symbiosis Centre for Medical Image Analysis, Symbiosis International (Deemed University), Pune, India; Park S.-H., Department of Electronic Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongb, Gyeongsan, uk-38541, South Korea
Rights
Restricted Access; Hardcopy may be available in the library
Relation
ISSN: 2352152X;
Format
online
Language
English
Type
Article

Citation

Reddy, Nandarapu Purushotham; Naik, Ramavath Janraj; Macherla, Nagaraju; Joseph, D. Paul; Jafri, R. Imran; Ahn, Chang Hoi; Siddiqui, Masoom Raza; Gonuguntla, Venkateswarlu; Park, Si-Hyun, “Biowaste-derived hierarchical activated porous carbon with heteroatom-doping (N/S) for efficient symmetrical supercapacitors: A cow urine approach,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 21, 2026, https://archives.christuniversity.in/items/show/22249.

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