Sub-10-nm Co3O4 nanoparticles/graphene composites as high-performance anodes for lithium storage

Kyunghoon Jang, Deuk Kyu Hwang, Francis Malar Auxilia, Jaewon Jang, Hayong Song, Byeong Yun Oh, Yoongon Kim, Junsik Nam, Ji Woong Park, Sunho Jeong, Sun Sook Lee, Sungho Choi, In S. Kim, Won Bae Kim, Jae Min Myoung, Moon Ho Ham

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21 Citations (Scopus)

Abstract

To improve the electrochemical performance of Co3O4/graphene composites towards high-performance lithium ion batteries, various facile chemical methods have been developed to form hybrid Co3O4/graphene composites, but the compositions of these composites were considerably different. In this study, a two-step solvothermal synthesis method was employed to accurately control the concentration of Co3O4 nanoparticles (NPs) with particle sizes less than 10 nm in the composite. The Co3O4/reduced graphene oxide (RGO) composites exhibited the highest reversible capacity of 1600 mAh g−1 at 43 wt% Co3O4 NPs. The synergic effects of the sub-10-nm sized Co3O4 and the RGO sheets resulted in improved reversible capacity, cycling stability, and rate capability, which are caused by a large number of active sites and the short diffusion pathways provided by the nano-sized Co3O4, as well as the elastic buffer space and conductive pathway provided by the RGO sheets.

Original languageEnglish
Pages (from-to)15-21
Number of pages7
JournalChemical Engineering Journal
Volume309
DOIs
Publication statusPublished - 2017 Feb 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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    Jang, K., Hwang, D. K., Auxilia, F. M., Jang, J., Song, H., Oh, B. Y., Kim, Y., Nam, J., Park, J. W., Jeong, S., Lee, S. S., Choi, S., Kim, I. S., Kim, W. B., Myoung, J. M., & Ham, M. H. (2017). Sub-10-nm Co3O4 nanoparticles/graphene composites as high-performance anodes for lithium storage. Chemical Engineering Journal, 309, 15-21. https://doi.org/10.1016/j.cej.2016.10.009