| A Functional N/S doped-Carbon Electrode from a Carbonized Bagasse Activated with Water Vapor |
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Fitria Rahmawati1, Ainaya Febi Amalia1, Arikasuci Fitonna Ridassepri1,2, Jun Nakamura2, Younki Lee3 |
1Research Group of Solid-State Chemistry & Catalysis, Chemistry Department, Sebelas Maret University, Jl. Ir. Sutami 36 A Kentingan, Surakarta, Indonesia 57126
2Department of Engineering Science, The University of Electro-Communications (UEC- Tokyo), 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
3Department of Materials Engineering and Convergence Technology, Gyeongsang National University, Jinju, Gyeongnam 52828, Republic of Korea |
Correspondence:
Fitria Rahmawati,
Email: fitria@mipa.uns.ac.id
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Received: 2 January 2024 • Accepted: 23 April 2024 |
| Abstract |
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This research used solid waste from sugarcane production, named bagasse, as raw material for a functional carbon electrode. The bagasse was carbonized to produce carbon powder and, following activation with water vapor at 700 oC. The activated carbon was doped with N and S to improve its electrochemical properties by treating it with thiourea precursor and heating it at 850 oC under nitrogen flow to produce N/S doped-carbon (NSCE). The produced carbon was then characterized to understand the specific diffraction pattern, molecular vibrations, and surface morphology. The result found that the NSCE showed two broad diffraction peaks at 23o and 43o, corresponding to [002] and [100] crystal planes following JCPDS75-1621. FTIR spectra showed some O-H, C-H, C-O, and C=C peaks. Peaks of C=N, C-N, and S-H demonstrate the presence of N/S within the NSCE. Raman analysis revealed that N/S doping caused structure defects within the single C6 layer networks, providing carbon vacancies () because of C replacement by N () and S (). Meanwhile, XPS analysis showed N/S introduction to the C network by revealing peaks at 168.26 eV and 169.55 eV, corresponding to S2p3/2 and S2p1/2, and 171. 95 eV corresponds to C-SO3-C, indicating the presence of S within the thiol group attached to the carbon. Meanwhile, N1s are revealed at 402.4 eV and 405.5 eV, confirming pyrrolic nitrogen (N-5) and quaternary nitrogen (N-Q). The electrochemical analysis found that the reaction within the preparedNSCE/NaClO4/Na was reversible, with an onset potential of 0.1 V vs. Na/Na+, explaining the intercalation and deintercalation of sodium ions. The sodium battery full cell showed an excellent battery performance with an initial charging-discharging capacity of 720 mAh/g and 570 mAh/g, respectively, at 0.2C. Meanwhile, a cycling test showed the average Coulombic Efficiency of 84.4 % and capacity retention of 57 % after 50 cycles. |
| Key Words:
carbon, biomass, bagasse, electrode, sodium ion battery |
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