Chemically Integrating MXene Nanosheets with N-Doped C-Coated Si Nanoparticles for Enhanced Li Storage Performance

Du Yeol Jo, Jin Koo Kim, Hong Geun Oh, Yun Chan Kang, Seung Keun Park

Research output: Contribution to journalArticlepeer-review

Abstract

Herein, ternary composite composed of Si@N-doped C coupled with 2D MXene nanosheets (Si@NC/MX) is synthesized by a facile solution-based chemical method followed by thermal treatment. In the aqueous solution, polydopamine (PDA)-coated Si nanoparticles were strongly coupled with MXene nanosheets via chemical interactions. Subsequently, the PDA layers were transformed into N-doped amorphous C during the annealing process. As anodes for Li-ion batteries (LIBs), the rational architecture of composites can effectively prevent particle aggregation and restacking between MXene nanosheets during cycling. Also, the dual protection by the C layer and MXene can alleviate the large volume expansion of the Si anode and provide conductive pathways. Accordingly, the Si@NC/MX composites exhibited a high reversible capacity of 953 mA h g−1 after 300 cycles at 1 A g−1. In addition, the electrode exerted a high reversible capacity of 849 mA h g−1 even at a high current density of 10 A g−1.

Original languageEnglish
Article number113840
JournalScripta Materialia
Volume199
DOIs
Publication statusPublished - 2021 Jul 1

Keywords

  • Carbon coating
  • Li-ion battery
  • MXene
  • Silicon anode
  • Ternary composite

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

Fingerprint Dive into the research topics of 'Chemically Integrating MXene Nanosheets with N-Doped C-Coated Si Nanoparticles for Enhanced Li Storage Performance'. Together they form a unique fingerprint.

Cite this