Optimizing nitrogen doping strategies in hard carbon for enhanced performance in sodium-ion batteries
Maratov M. Alpysbayev A. Abduakhitov D. Myrzakhmetov B. Kudaibergenov K. Bakenov Z. Myung S.-T. Konarov A.
August 2025Elsevier Ltd
Carbon Trends
2025#20
Sodium-ion batteries are emerging as a promising and cost-effective alternative to lithium-ion batteries for large-scale applications. Among various anode materials, hard carbon has become a preferred choice for sodium-ion batteries. This study focuses on synthesizing hard carbon from bio-waste cherries and investigating the impact of nitrogen doping strategies on its electrochemical performance. Using urea as a precursor, post nitrogen doping was found to enhance the structural properties of hard carbon, facilitating better penetration of sodium ions into its internal structure. The results revealed that post nitrogen doping significantly improved the capacity of hard carbon, increasing it from 206 mAh g⁻¹ to 274 mAh g⁻¹ at a current density of 20 mA g⁻¹. Additionally, the post nitrogen-doped hard carbon demonstrated an impressive capacity of 110 mAh g⁻¹ at a high current density of 1 A g⁻¹. These findings underscore the potential of nitrogen doping in optimizing hard carbon for sodium-ion battery applications.
Bio-waste , Hard Carbon , N-doping , Sodium-ion batteries
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Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, 53 Kabanbay Batyr Ave., Astana, Kazakhstan
Department of Materials Science, Nanotechnology and Engineering Physics, Satbayev University, 22 Satbaev str., Almaty, 050013, Kazakhstan
Hybrid Materials Research Center, Department of Nanotechnology and Advanced Materials Engineering, Sejong Battery Institute, Sejong University, Seoul, 05006, South Korea
Department of Chemical and Materials Engineering
Department of Materials Science
Hybrid Materials Research Center
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