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Ionics

, Volume 25, Issue 2, pp 421–427 | Cite as

Micropatterned arrays of vertically-aligned CNTs grown on aluminum as a new cathode platform for LiFePO4 integration in lithium-ion batteries

  • Mesut Yilmaz
  • Supil RainaEmail author
  • Shao-Hua Hsu
  • Weng P. Kang
Original Paper
  • 56 Downloads

Abstract

The conventional lithium-ion battery fabrication process involves mixing of the active cathode material with additives and tape casting on metallic current collectors. The thickness of this layer limits the performance of the cathode. In this work, a novel cathode platform is presented consisting of a micropatterned array of vertically aligned carbon nanotubes (CNTs) on aluminum (Al) foil that serves as host for active cathode powders. This highly conductive three-dimensional structure provides a high specific surface area to support greater mass loading capable of achieving high energy and power densities. The feasibility of this structure was demonstrated by using commercially available lithium iron phosphate (LFP) powder which was processed and dispersed using two different techniques—vibration-assisted drip-coating and electrophoretic deposition. A high specific capacity of 143 mAh/g at 3.4 V was achieved at C/20 rate for the novel cathode fabricated using electrophoretic deposition, which seemed superior to vibration-assisted drip coating with its easier application, more uniform particle coating, stronger particle attachment to the CNTs, and better electrochemical performance. In addition, CNT array on Al has been demonstrated to be a viable candidate for fabricating cathodes for energy storage applications without the need for any additives and/or binders.

Keywords

CNT Lithium iron phosphate Lithium ion batteries Electrophoretic deposition Renewable energy 

Notes

Acknowledgments

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Mesut Yilmaz
    • 1
  • Supil Raina
    • 1
    Email author
  • Shao-Hua Hsu
    • 1
  • Weng P. Kang
    • 1
  1. 1.Department of Electrical Engineering and Computer ScienceVanderbilt UniversityNashvilleUSA

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