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Effect of sol-gel process parameters on the properties of a Li1.3Ti1.7Al0.3(PO4)3 solid electrolyte for Li-ion batteries

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Abstract

In this study, the influence of the processing parameters, such as the synthesis temperature and the lithium sources on the structure, particle size, morphology and ionic conductivity of Li1+x Ti2−x Al x (PO4)3 (LTAPO) was investigated. LiNO3, LiCl, and Li acetate were employed as lithium sources for investigating the effects of Li sources on the properties of the solid electrolyte. The morphologies and the particle size distribution of the prepared LTAPO samples were analyzed by using scanning electron microscopy (SEM) and a laser particle size analyzer. Their crystallinities were measured by means of X-ray diffraction (XRD). An increase in the synthesis temperature caused a pronounced growth in the particle size without any impurities, especially at temperatures above 700 °C. In addition, LiCl lithium sources showed the highest particles size. The effect of the processing parameters on the ionic conductivity of the prepared LTAPO was investigated by using electrochemical impedance spectroscopy (EIS). The ionic conductivities of the LTAPO prepared by using an optimized synthesis temperature with different lithium sources were 8.36 × 10−4, 5.73 × 10−4, and 7.18 × 10−4 S/cm for C-LTAPO, A-LTAPO, and N-LTAPO, respectively. The properties of the ceramic solid electrolyte were shown to be affected by the choice of the synthesis temperature and the Li source material.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Changwon National University, Changwon, 51140, Korea

    Seoung Soo Lee, Jing Lee & Yeon-Gil Jung

  2. Department of Solar & Energy Engineering, Cheongju University, Cheongju, 28496, Korea

    Jae-Kwang Kim

  3. Ulsan National Institute of Science and Technology, School of Energy and Chemical Engineering, Ulsan, 44919, Korea

    Youngsik Kim

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  1. Seoung Soo Lee
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  2. Jing Lee
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  3. Yeon-Gil Jung
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  4. Jae-Kwang Kim
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  5. Youngsik Kim
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Correspondence to Yeon-Gil Jung or Jae-Kwang Kim.

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Lee, S.S., Lee, J., Jung, YG. et al. Effect of sol-gel process parameters on the properties of a Li1.3Ti1.7Al0.3(PO4)3 solid electrolyte for Li-ion batteries. Journal of the Korean Physical Society 68, 28–34 (2016). https://doi.org/10.3938/jkps.68.28

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  • DOI: https://doi.org/10.3938/jkps.68.28

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