Novel spinel nanocomposites of Ni x Co 1−x Fe 2 O 4 nanoparticles with N-doped graphene for lithium ion batteries

Xinyan Jiao, Li Cai, Xifeng Xia, Wu Lei, Qingli Hao*, Daniel Mandler

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

A dual-doping strategy was applied to fabricate the novel electrode materials. For the first time, the spinel hybrids of nanosized Ni x Co 1−x Fe 2 O 4 with N-doped graphene (N x -NG) were synthesized by a hydrothermal co-precipitation method. The size of Ni x Co 1−x Fe 2 O 4 (N x ) nanoparticles on N-doped graphene can be tuned with the regulation of Ni/Co content. Among these nanocomposites, the Ni 0.4 Co 0.6 Fe 2 O 4 nanoparticles with the smallest average size of 10 nm are uniformly anchored on the N-doped graphene. The electrochemical characterizations display that the N 0.4 -NG exhibits the best electrochemical lithium storage performance compared to other five nanocomposites. It delivers a high capacity of 1367.0 mA h g −1 at the first discharge process,and the reversible capacity retention of 87% (2nd to 50th) at 0.1 A g −1 . The excellent electrochemical performance of N 0.4 -NG can be owing to the small size of nanoparticles and its well-combination with N-doped graphene, which provide the large surface area and promote the ion/electron transfer rate. The synergistic effect resulted from the strong interaction between N 0.4 and N-doped graphene is contributed to the enhanced electrochemical performance of N 0.4 -NG. This study not only extends graphene-based electrode materials for lithium ion battery, but also promotes the development of energy resources.

Original languageAmerican English
Pages (from-to)200-208
Number of pages9
JournalApplied Surface Science
Volume481
DOIs
StatePublished - 1 Jul 2019

Bibliographical note

Publisher Copyright:
© 2019 Elsevier B.V.

Keywords

  • Graphene
  • Lithium ion batteries
  • Ni Co Fe O
  • Spinel materials

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