Can the generation of battery solid electrolyte interface (SEI) can be avoided?

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Offline joeweller

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What does it mean when a battery "operates above the reduction potential of the electrolytes, so generation of SEI can be avoided"?
I was under the impression that operating above the voltage just exacerbates the side reaction. ie if a battery operates at 2V, then the electrolysis reaction at 1.23V is faster than if the battery operated at 1.5V.
« Last Edit: 10/06/2016 22:51:42 by chris »


Offline chiralSPO

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Re: generation of SEI can be avoided?
« Reply #1 on: 10/06/2016 20:55:18 »
I think they mean the electrolyte *inside* the battery. If you mean "solid electrolyte interface" by SEI, this happens when the electrolyte in the battery reacts with the energy carrier (often lithium) in the battery. This leads to the formation of a layer on the surface of the lithium that lithium ions must then diffuse through for charge balance during battery discharge.