Abstract
Steady-state polarization measurements of lithium titanium oxide (LTO; Li[Li1/3Ti5/3]O4) were carried out using the 0-V lithium-ion cells consisting of two identical LTO-electrodes with a parallel-plate symmetrical electrode configuration. The sinusoidal voltage with the peak amplitude of 1.0 V was imposed at 0.1 Hz upon the 0-V cells and the current response was measured as a function of time. The steady-state polarization, obtained by plotting the current versus applied voltage, was linear in current up to approximately 60 mA cm−2 or 4 A g−1 based on the LTO weight and suggested the resistance polarization only for the lithium insertion electrode of the LTO. The method was also applied to lithium aluminum manganese oxide (LAMO; Li[Li0.1Al0.1Mn1.8]O4) and the resistance polarization of the LAMO-electrode was determined for currents up to approximately 25 mA cm−2 or 2 A g−1 based on the LAMO weight. The validity of the results was examined for the polarization measurements of the 2.5-V lithium-ion battery consisting of LTO and LAMO, and the significance of the polarization measurements of lithium insertion electrodes for high-power applications was discussed.
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This work was partially supported by a grant-in-aid for scientific research from the Osaka City University Science Foundation.
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Contribution to ICMAT 2007, Symposium K: Nanostructured and bulk materials for electrochemical power sources, July 1-6, 2007, Singapore.
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Ohzuku, T., Yamato, R., Kawai, T. et al. Steady-state polarization measurements of lithium insertion electrodes for high-power lithium-ion batteries. J Solid State Electrochem 12, 979–985 (2008). https://doi.org/10.1007/s10008-007-0464-4
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DOI: https://doi.org/10.1007/s10008-007-0464-4