1. In all solid state battery half cell systems, the first charge capacity is very high than 1st discharge capacity.
All of the differences are from the side reactions between electrode and solid electrolyte?
2. In many papers, all solid state battery show lower discarge capacity than Li ion battery. (ex) NCM811 200mAh/g>180mAh/g) Is this loss from the poor contact between solid electrolyte and cathode or have another reason?
Oliver Boakye Danquah
Yes, the difference in the first charge and discharge capacities in all-solid-state battery systems is often due to side reactions between the electrode and solid electrolyte. These side reactions can consume lithium ions and result in a lower discharge capacity compared to the first charge capacity. The lower discharge capacity compared to Li-ion batteries can have several reasons. One of the reasons is indeed the poor contact between the solid electrolyte and the cathode, which can lead to decreased lithium ion transport and lower capacity utilization. Other reasons include the low electrical conductivity of some solid electrolytes, as well as limitations in the material properties of the electrodes, such as low lithium ion diffusivity or poor lithium ion kinetics. Additionally, the thinness of the solid electrolyte layer in some all-solid-state batteries can lead to a decreased active electrode area and lower capacity.
Hakmin Kim Dawn Ganu
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Paul Akinyemi
Hi Oliver,
I think the first part of your question has been answered previously by Dr. Kuksenko. You can check it out to get more perspectives.
(https://www.researchgate.net/post/if_discharge_capacity_is_higher_than_charge_capacity_in_lithium_ion_half_cell_from_anode)
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