A simple synthesized N-doped FeS2/Fe3O4@C nanocomposite as anode for sodium ion batteries

• Published in: Materials letters Vol. 275; p. 128109
• Main Authors: Song, Xi, Li, Xuan, Chen, Zehong, Wang, Zhongde
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.09.2020; Elsevier BV
• Subjects: Anode; Anodes; Carbon; Carbon materials; Electrochemical analysis; Electrode materials; Iron disulfide; Iron oxides; Materials science; N-doped; Nanocomposites; Nanoparticles; Pyrite; Sodium ion battery; Sodium-ion batteries; N-doped; Sodium ion battery; Nanocomposites; Anode; Iron disulfide; Carbon materials
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2020.128109

•FeS2/Fe3O4@C composite is synthesised via a simple route.•Carbon layer outside enhances the structural stability.•N-doped carbon in the composite enhances the electrochemical performance.•FeS2/Fe3O4@C shows high reversible capacity and excellent cycling stability. In this work, the nanocomposite of N-doped carbon layer wrapped FeS2/Fe3O4 nanoparticles (FeS2/Fe3O4@C) is successfully prepared via a simple method. By combining small grain diameter (about 100 nm), the promotion of N atoms and buffering of carbon layer, when evaluated as anode material for sodium ion batteries (SIBs), the FeS2/Fe3O4@C nanocomposite exhibits superior reversible capacity of 670 mAh g−1 and satisfied cycling stability (98.6% capacity retention) after 250 reversible discharge/charge cycles, also excellent rate capability (330 mAh g−1 at 10 A g−1). Benefiting from the easy synthesis route and excellent electrochemical performance, FeS2/Fe3O4@C shows great potential for SIBs’ large-scale application.