Journal of the Korean Electrochemical Society (전기화학회지)

The Korean Electrochemical Society (한국전기화학회)
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High Performance of Nano-sized LiFePO4 Positive Electrode Using Etched Al Current Collector

  • Lee, Gil-Won (Department of Chemical and Biological Engineering and Research Center for Energy Conversion & Storage, Seoul National University) ;
  • Ryu, Ji-Heon (Graduate School of Knowledge-Based Technology and Energy, Korea Polytechnic University) ;
  • Oh, Seung-M. (Department of Chemical and Biological Engineering and Research Center for Energy Conversion & Storage, Seoul National University)
  • Received : 2010.03.22
  • Accepted : 2010.04.05
  • Published : 2010.08.28
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Abstract

The electrodes comprising nano-sized $LiFePO_4$, carbon black and binder are prepared with two different Al current collectors. One is the generally used normal Al foil and the other is the chemically etched Al foil. Surface characteristics of each Al foil and electrochemical performance of the cathodes using each foil are investigated. The electrode from the etched Al foil exhibits better physical and electrochemical properties as compared to those of the normal Al foil because the etched Al foil has rough surface with sub-micron pores which improve the adhesion between the electrode materials and the substrate. The electrode on the etched Al foil has such a strong peel strength that the impedance is smaller than that of normal one. Indeed the $LiFePO_4$ electrode from the etched Al foil exhibits a better rate capability and remains intact even after storage for 1 week at the charged state at the elevated temperature $60^{\circ}C$.

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References

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