Abstract
A green and sustainable approach was employed to synthesize N, O-codoped porous carbon nanorods with two-end-open characteristics. In this method, a crab shell was utilized as a template and activator, while egg white served as a carbon precursor. The resulting carbon nanorods sintered at 700 °C (CNRs-700), exhibited cross-linked pore channels, a high surface area, and abundant defects and active sites. These features imparted superior energy storage properties to the material, enabling its application as both an anode for lithium-ion batteries and a supercapacitor. The CNRs-700 demonstrated an exceptional lithium storage capacity of 530.6 mAh g−1 at 2 A g−1, corresponding to 90.1% of the capacity achieved at 100 mA g−1, which is ascribed to the pseudocapacitive contribution. Furthermore, in an evaluation combining a three-electrode configuration in KOH electrolyte at a high current density of 50 A g−1, the CNRs-700 retained a specific capacitance of 140 F g−1. For symmetrical supercapacitors based on CNRs-700 in 1 M Na2SO4 electrolyte, the energy density reached 27.1 Wh kg−1 at a 375 W kg−1 power density, demonstrating remarkable cyclability over 10,000 consecutive cycles. The superior rate performance and cycling stability would accentuate the suitability of the biomass-derived carbon materials for such systems.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (51602046), China Scholarship Council Program (201906605006, 201906605013), Postdoctoral Scientific Research Developmental Fund of Heilongjiang Province (LBH-Q20065), Scientific Research Foundation for Introduction Talents of Wuhan Polytechnic University(2022RZ008, 2022RZ021) and Scientific Research Project of Wuhan Polytechnic University (2023Y28, 2023Y48). The authors thank Siqing Cheng for the contribution to the experiment.
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Liao LX: Methodology, Data curation, Writing-original draft, Funding acquisition, Writing-Review & Editing. Zhang JY: Data curation, Methodology, Investigation. Wang GQ: Data curation, Methodology, Validation. Han JM: Software, Investigation, Data curation. Cao ZW: Data curation, Investigation. Zhang JT: Formal analysis, Validation. Xu CZ: Formal analysis, Investigation. Qin ZH: Methodology, Data curation. Fang T: Project administration, Writing-review& editing, Methodology, Funding acquisition. Wei BM: Resources, Conceptualization, Writing-Review & Editing.
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Liao, L., Zhang, J., Wang, G. et al. Sustainable synthesis of hierarchical porous N, O-codoped carbon nanorods with pseudocapacitance contribution for lithium-ion battery anodes and supercapacitors. J Mater Sci 59, 2070–2086 (2024). https://doi.org/10.1007/s10853-024-09372-3
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DOI: https://doi.org/10.1007/s10853-024-09372-3