Abstract
Intercalation of lithium ions into the electrodes of lithium ion batteries is affected by the stress of active materials, leading to energy dissipation and stress dependent voltage hysteresis. A reaction-diffusion-stress coupling model is established to investigate the stress effects under galvanostatic and potentiostatic operations. It is found from simulations that the stress hysteresis contributes to the voltage hysteresis and leads to the energy dissipation. In addition, the stress induced voltage hysteresis is small in low rate galvanostatic operations but extraordinarily significant in high rate cases. In potentiostatic operations, the stresses and stress induced overpotentials increase to a peak value very soon after the operation commences and decays all the left time. Therefore, a combined charge-discharge operation is suggested, i.e., first the galvanostatic one and then the potentiostatic one. This combined operation can not only avoid the extreme stress during operations so as to prevent electrodes from failure but also reduce the voltage hysteresis and energy dissipation due to stress effects.
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Citation: LI, H. L., SONG, Y. C., LU, B., and ZHANG, J. Q. Effects of stress dependent electro-chemical reaction on voltage hysteresis of lithium ion batteries. Applied Mathematics and Mechanics (English Edition), 39(10), 1453–1464 (2018) https://doi.org/10.1007/s10483-018-2373-8
Project supported by the National Natural Science Foundation of China (Nos. 11672170, 11332005, and 11702166) and the Natural Science Foundation of Shanghai (No. 16ZR1412200)
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Li, H., Song, Y., Lu, B. et al. Effects of stress dependent electrochemical reaction on voltage hysteresis of lithium ion batteries. Appl. Math. Mech.-Engl. Ed. 39, 1453–1464 (2018). https://doi.org/10.1007/s10483-018-2373-8
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DOI: https://doi.org/10.1007/s10483-018-2373-8