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Polyol Synthesis of Lithium Iron Phosphate with Carbon Nanotubes: Effect of Dispersion on Crystallinity and Electrochemical Performance

  • Wesley D. Tennyson (a1)

Abstract

Carbon nanotubes (CNTs) have been shown to be a viable conductive additive in Li-Ion batteries [1]. By using CNTs battery life, energy, and power capability can all be improved over carbon black, the traditional conductive additive. A significantly smaller weight percentage (5% CNTs) is needed to get the same conductivity as 20% carbon black. Many of the previous efforts found that a combination of conductive additives was most advantageous [2]. Unfortunately many of these efforts did not attend to the unique challenge that dispersing nanotubes presents and used non-optimal methods to disperse CNTs (e.g. ball milling) [3,4]. With poor dispersion a stable and resilient conductive network in the cathode is hard to form with CNTs alone. Here we investigate the formation of LiFePO₄ with CNTs using a polyol process synthesis.

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References

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1. Wang, H., Huang, K., Ren, Y., Huang, X., Liu, S., and Wang, W., J. Power Sources, 196, 9786 (2011).
2. Gnanavel, M., Patel, Manu U. M., Sood, A. K., Bhattacharyya, Aninda J., Journal of The Electrochemical Society, 159(4) A336A341 (2012)
3. Liu, X.-M., Huang, Z. D., Oh, S. W., Zhang, B., Ma, P.-C., Yuen, M. M.F., and Kim, J.-K., Composites Science and Tech., 72, 121 (2012).
4. Woodman, R.H., Klotz, B.R., Dowding, R.J., Ceram. Int., 31, 765768 (2005).

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Polyol Synthesis of Lithium Iron Phosphate with Carbon Nanotubes: Effect of Dispersion on Crystallinity and Electrochemical Performance

  • Wesley D. Tennyson (a1)

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