N-doped graphitic carbon coated Fe2O3 using dopamine as an anode material for sodium-ion batteries

• Published in: Journal of alloys and compounds Vol. 921; p. 166082
• Main Authors: Song, Jungwook, Maulana, Achmad Yanuar, Kim, Hanah, Yun, Boram, Gim, Hyunjeong, Jeong, Yuri, An, Nahyun, Futalan, Cybelle M., Kim, Jongsik
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 15.11.2022; Elsevier BV
• Subjects: Anode; Anodes; Carbon; Chemical composition; Cycles; Discharge; Dopamine; Electrode materials; Fe2O3; Nanoparticles; Nitrogen; Nitrogen doped graphitic carbon; Sodium-ion batteries; Thickness; Nitrogen doped graphitic carbon; Anode; Sodium-ion batteries; Fe2O3
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2022.166082

Fe2O3 has attracted substantial attention due to environmentally benign and low-cost chemical compositions, and high theoretical capacity (about 1007 mAh g−1). However, Fe2O3 electrode suffers from low electrical and ionic conductivities as well as its large volume expansion during cycles. To alleviate these issues, Fe2O3 nanoparticles are uniformly wrapped by N-doped graphitic carbon (NGC) using dopamine as single carbon and nitrogen sources through a facile method. The complete conversion reaction of Fe2O3 is observed in the initial discharge process. The thickness of carbon layers is simply adjusted by controlling the self-polymerization of dopamine. The Fe2O3/N-doped graphitic carbon (Fe2O3/NGC) represents the excellent cycling performance with reversible discharge capacity of 502.9 mAh g−1 at 0.1 C after 150 cycles as well as high-rate cycling properties. In addition, a sodium full cell comprised of Fe2O3/NGC||Na3V2(PO4)3 exhibits notable electrochemical performances. [Display omitted] •Fe2O3 particles coated with nitrogen-doped graphitic carbon are successfully fabricated through a facile method.•Reversibility of the conversion reaction of Fe2O3 was confirmed by ex-situ XRD, TEM, and Raman analyses.•Fe2O3/NGC with optimized NGC thickness represents improved electrochemical performance with high redox reversibility.