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説明:

Rational engineering of electrode composition and architecture is an effective strategy to achieve high capacity and long cycling stability for sodium-ion batteries (SIBs). In this work,
a CoS2/FeS2 heterostructure encapsulated within an N-doped carbon (NC) framework and further interconnected by a threedimensional (3D) reduced graphene oxide (rGO) network (CoS2/FeS2@NC/rGO) was rationally designed and synthesized by an in situ carbonization−sulfidation process. The NC framework enhances the conductivity and structural stability, while the 3D rGO network provides continuous Na+ and electron transfer
pathways and effectively inhibits the aggregation of particles during cycling. Moreover, the heterointerfaces between CoS2 and FeS2 promote Na+ diffusion and boost the redox activity, thereby facilitating reaction kinetics. Consequently, the CoS2/FeS2@NC/rGO anode exhibits an excellent rate performance of 518.1 mAh g−1 at 20 A g−1 and superior cycling performance (586.5 mAh g−1 at 2 A g−1 after 1400 cycles), demonstrating its potential in
practical applications. Furthermore, ex situ XRD and Raman revealed the underlying Na+ storage mechanisms and structural stability of CoS2/FeS2@NC/rGO. This work provides valuable insights into the rational design of high-performance SIB anodes through
heterostructure engineering and hierarchical structural optimization.

権利情報:

• In Copyright
  

  This document is the unedited Author’s version of a Submitted Manuscript subsequently accepted for publication in ACS Applied Nano Materials, copyright © 2026. To access the final published article, see https://doi.org/10.1021/acsanm.6c00227.

キーワード: Sodium ion batteries, FeS2/CoS2 heterostructure, Anode, rGO, N-doped carbon

刊行年月日: 2026-05-01

出版者: American Chemical Society (ACS)

掲載誌:

• ACS Applied Nano Materials (ISSN: 25740970) vol. 9 issue. 17 p. 7541-7551

研究助成金:

• Ministry of Education, Culture, Sports, Science and Technology JPMXP1225NM5040

原稿種別: 査読前原稿 (Author's original)

MDR DOI: https://doi.org/10.48505/nims.8677

公開URL: https://doi.org/10.1021/acsanm.6c00227

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更新時刻: 2026-10-26 14:31:06 +0900

MDRでの公開時刻: 2026-10-26 10:30:44 +0900