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Effects of Tween 80 dispersant on LiFePO4/C cathode material prepared by sonochemical high-temperature ball milling method


Li-ion batteries have drawn increasing attention because of attractive characteristics such as high operating voltage, high particle density, long cycle life, low self-discharge, and not showing a memory effect. LiFePO4/C cathode material was prepared via a sonochemical high-temperature ball milling method using Tween 80 dispersant. The effects of the Tween 80 on the electrochemical properties of LiFePO4/C were investigated. The experimental results showed that the Tween 80 improved the surface area of LiFePO4/C, and the prepared cathode material showed a better electrochemical performance: it delivered discharge capacities of 159.0 mAh g−1 at 0.1 C and 110.4 mAh g−1 at 10 C, which were higher than for Tween 80-free samples. Moreover, the discharge capacity was 119.6 mAh g−1 at a rate of 5.0 C over 100 cycles while the capacity retention was 94.2%.

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This work is financially supported by the National Natural Science Foundation of China (No. 51704068), the National Key R&D Program of China (No. 2017YFC0805100), and the Fundamental Research Funds for the Central Universities (No. N172504020).

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Correspondence to Qing Zhao.

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Zhao, Q., Li, X., Shao, Z. et al. Effects of Tween 80 dispersant on LiFePO4/C cathode material prepared by sonochemical high-temperature ball milling method. Ionics 25, 5565–5573 (2019).

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  • LiFePO4
  • Cathode material
  • Tween 80
  • Sonochemical
  • High-temperature ball milling