Electrochemical performance of carbon-encapsulated Fe3O4 nanoparticles in lithium-ion batteries: morphology and particle size effects

Yongguang Zhang, Yue Li, Haipeng Li, Yan Zhao, Fuxing Yin, Zhumabay Bakenov

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

Carbon-encapsulated Fe3O4 nanoparticles (Fe3O4@C) with varied microstructures were produced by controlling the relative concentrations of glucose and iron nitrate hydrate in a hydrothermal process, followed by heat treatment in Ar atmosphere. Three Fe3O4@C nanocomposites with different particle sizes (mean diameter 31.2, 45.1 and 55.3 nm) and Fe3O4 core size (26.8, 15.4 and 10.3 nm) were investigated for lithium storage performance. The Fe3O4@C nanoparticles with 15.4 nm Fe3O4 core exhibit excellent initial specific capacity (1215 mAh g−1) and significantly improved cycling performance (806 mAh g−1 after 100 cycles) and rate capability (573 mAh g−1 at current density of 1500 mA g−1), in comparison to the other Fe3O4@C composites. This superior performance is attributed to microstructural effects spawned from the pomegranate-like carbon coating architecture of the composite, the appropriate carbon content, and the optimized particle size of Fe3O4@C nanoparticles, which combined suppress the agglomeration and pulverization of Fe3O4 nanoparticle upon cycling and enhance the electrical conductivity of the Fe3O4 anode.

Original languageEnglish
Pages (from-to)475-483
Number of pages9
JournalElectrochimica Acta
Volume216
DOIs
Publication statusPublished - Oct 20 2016

Keywords

  • Anode
  • Carbon-encapsulated FeO nanoparticle (FeO@C) composite
  • Lithium ion battery
  • microstructure effects
  • reactant concentration

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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