elucidating the performance limitations of lithium-ion batteries due to species and charge transport through five characteristic parameters

Due to the performance limitations caused by species and charge transfer, insufficient utilization rate is one of the key problems of the persistence of various lithiumion batteries.
In order to clarify the relevant mechanism, two sets of feature parameters are proposed.
The first group contains three feature time parameters, namely :(1)
Te, it\'s Li-
Ion transfer rate in electrolyte phase ,(2)
Ts, characterize the rate of lithium diffusion in solid active materials, and (3)
Tc, describing the local Li-
Due to the electrochemical reaction, the ion depletion rate in the electrolyte/electrode interface electrolyte phase.
The second group contains two resistance parameters: Re and Rs, representing the equivalent ion transport resistance and the effective electron transport resistance in the electrode, respectively.
The electro-chemical modeling and simulation of the discharge process of LiCoO2 battery show that :(1)
If te, ts and tc are in the same order of magnitude, species transport may not cause any performance limitations on the battery; (2)
The performance of the mechanism caused various restrictions, thick electrodes, high
Rate operation, large-
The size of the active substance particles and the effect of charge transfer are revealed.
These findings can serve as a quantitative guide to the development and design of more advanced Li-ion batteries.