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How to set the boundary between a solid electrolyte and a liquid electrolyte
Posted 2022年6月2日 GMT-4 11:45 Battery Design, Chemical Reaction Engineering, Electrochemistry 0 Replies
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I try to model a cell structure composed of Li/solid electrolyte/liquid electrolyte/Li, where the solid electroyte has unity cation transfer number and the liquid one has a transfer number less than 1.
The model is made by the Lithium-ion Battery interface. Two rectangle domains are defined by two different electrolyte Materials with unity transfer number and transfer number <1, to simulate the solid and liquid electrolytes, respectively. The two lithium electrodes are model by Electrode Surface nodes at the two ends. A constant current is applied through the cell.
Using time dependent study, it is found the salt concentration increases all over the cell, which is phycially unreasonable. Moreover, it is found the salt concentration and the potential across the boundary between the solid and liquid electrolyte are all continous. However, it should be incontinuous due to the space charge region at the boundary.
Then, how the properly set the boundary between a solid electrolyte and a liquid electrolyte?
Hello Bo Fan
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