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Determination of Li+ solid diffusion coefficient in LiMn2O4 by CITT

  • Materials Science and Engineering
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Abstract

The capacity intermittent titration technique (CITT) was developed based on the ratio of potentio-charge capacity to galvano-charge capacity (RPG) method, to continuously determine the solid diffusion coefficient (D) of the intercalary species within insertion-host materials with a small voltage region. The linear equations of D vs the value of ratio of the potentio-charge capacity to the galvano-charge capacity (q) were given. By the CITT technique, the Li+ solid diffusion coefficients within LiMn2O4 at different voltages were determined. The results show that the values of D varied from 3.447 × 10−9 to 7.60 × 10−11 cm2/s in the voltage range of charge from 3.3 to 4.3 V as a function of voltage with “W” shape.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Central South University, 410083, Changsha, China

    Tang Xin-cun PhD (Associate professor)

  2. State Key Laboratory of Powder Metallurgy, Central South University, 410083, Changsha, China

    Tang Xin-cun PhD (Associate professor), Huang Bai-yun & He Yue-hui

Authors
  1. Tang Xin-cun PhD
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  2. Huang Bai-yun
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  3. He Yue-hui
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Correspondence to Tang Xin-cun PhD.

Additional information

Foundation item: Project (20406024) supported by the National Natural Science Foundation of China: project (76600) supported by the Postdoctoral Science Foundation of Central South University

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Tang, Xc., Huang, By. & He, Yh. Determination of Li+ solid diffusion coefficient in LiMn2O4 by CITT. J Cent. South Univ. Technol. 12 (Suppl 1), 1–4 (2005). https://doi.org/10.1007/s11771-005-0360-y

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  • DOI: https://doi.org/10.1007/s11771-005-0360-y

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