Self-assembled three-dimensional mesoporous ZnFe2O4-graphene composites for lithium ion batteries with significantly enhanced rate capability and cycling stability

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)769-776
Journal / PublicationJournal of Power Sources
Volume275
Publication statusPublished - 1 Feb 2015

Abstract

We report a facile, one-pot hydrothermal strategy to prepare self-assembled three-dimensional mesoporous ZnFe2O4 submicron-sized spheres wrapped in graphene sheets as high-performance anode material for lithium ion batteries. The mesoporous submicron-sized spheres are composed of numerous nanoparticles where the void spaces between the neighboring nanoparticles provide a cushion to alleviate volume variation issues during the conversion/alloying process and also provide large contact areas with the electrolyte to facilitate lithium ion diffusion and electron transport during cycling. The synergistic effects between ZnFe2O4 submicron-sized spheres and graphene sheets are another positive effect to enhance the electrochemical performance. The electrochemical characterization of ZnFe2O4-graphene composites exhibits a high specific capacity of 1182 mAh g-1 cycling at a specific current of 100 mA g-1, and significantly enhanced rate capability and cycling stability after long-term testing resulting from their unique structure features.

Research Area(s)

  • Anode material, Graphene, Lithium ion battery, Mesoporous, Self-assembled

Citation Format(s)

Self-assembled three-dimensional mesoporous ZnFe2O4-graphene composites for lithium ion batteries with significantly enhanced rate capability and cycling stability. / Dong, Yucheng; Xia, Yang; Chui, Ying-San; Cao, Chenwei; Zapien, Juan Antonio.

In: Journal of Power Sources, Vol. 275, 01.02.2015, p. 769-776.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review