Few-layer graphene coated current collector for safe and powerful lithium ion battery

So Yeun Kim, Young Il Song, Jae Hyung Wee, Chang Hyo Kim, Byung Wook Ahn, Jung Woo Lee, Su Jeong Shu, Mauricio Terrones, Yoong Ahm Kim, Cheol Min Yang

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Abstract

In the fabrication of safe, but powerful lithium ion batteries (LIBs), graphene-related materials are being actively examined in order to meet the demand for applications such as electric vehicles and smart grids. However, most of this work has focused on liquid-phase exfoliated graphene and reduced graphene oxide. Herein, we demonstrate a simple, but effective route for significantly improving the electrochemical performance of currently available LIBs by coupling current collector with catalytically grown large-area graphene. When coating current collectors with large-area three-layered graphene, a reduction in the internal resistance (or effective electron transfer) between the current collector and active materials was observed. The graphene also protected the underlying collector from corrosion, greatly improving the power capability and cyclability of LIBs. The three-layered graphene provided the best electrochemical performance and corrosion resistance because of its high electrical conductivity and mechanical stability during the transfer process. We believe that our approach using interfacial graphene coating can be used with all kinds of electrochemical energy-storage systems, in which high corrosion resistance, electrical conductivity, and flexibility are critical.

Original languageEnglish (US)
Pages (from-to)495-503
Number of pages9
JournalCarbon
Volume153
DOIs
StatePublished - Nov 2019

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

Cite this

Kim, S. Y., Song, Y. I., Wee, J. H., Kim, C. H., Ahn, B. W., Lee, J. W., Shu, S. J., Terrones, M., Kim, Y. A., & Yang, C. M. (2019). Few-layer graphene coated current collector for safe and powerful lithium ion battery. Carbon, 153, 495-503. https://doi.org/10.1016/j.carbon.2019.07.032