Two birds with one stone: fes2@c yolk-shell composite for high-performance sodium-ion energy storage and electromagnetic wave absorption

Zengming Man, Peng Li*, Dong Zhou, Yizhou Wang, Xiaohui Liang, Rui Zang, Pengxin Li, Yuqi Zuo, Yeng Ming Lam, Guoxiu Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

124 Scopus citations


Cost-effective material with a rational design is significant for both sodium-ion batteries (SIBs) and electromagnetic wave (EMW) absorption. Herein, we report an elaborate yolk-shell FeS2@C nanocomposite as a promising material for application in both SIBs and EMW absorption. When applied as an anode material in SIBs, the yolk-shell structure not only facilitates a fast electron transport and shortens Na ion diffusion paths but also eases the huge volume change of FeS2 during repeated discharge/charge processes. The as-developed FeS2@C exhibits a high specific capacity of 616 mA h g-1 after 100 cycles at 0.1 A g-1 with excellent rate performance. Furthermore, owing to the significant cavity and interfacial effects enabled by yolk-shell structuring, the FeS2@C nanocomposite delivers excellent EMW absorption properties with a strong reflection loss (-45 dB with 1.45 mm matching thickness) and a broad 15.4 GHz bandwidth. This work inspires the development of high-performance bifunctional materials.

Original languageEnglish (US)
Pages (from-to)3769-3777
Number of pages9
JournalNano Letters
Issue number5
StatePublished - May 13 2020

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China (21573110), the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the Nanjing University of Aeronautics and Astronautics Ph.D. short-term visiting scholar project [Grant No. ([2019]8)], Singapore Ministry of Education AcRF Tier 2 (MOE-2019-T2-1-085), the Australian Rail Manufactory CRC projects (RMCRC: R1.1.1 and R1.1.2) and the Australian Research Council (ARC) Discovery Project (DP170100436; DP200101249).

Publisher Copyright:
© 2020 American Chemical Society.


  • Electromagnetic wave absorption
  • Iron pyrites@carbon composite
  • Sodium-ion battery
  • Yolk-shell structure

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering


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