SEI
Solid electrolyte interphase
The SEI is a solid interphase formed mainly on the negative electrode surface by products of reductive electrolyte decomposition.
Other learning contexts (9)
In context
Low-potential negative electrodes such as graphite need surface protection to prevent continued electrolyte reactions.
Example
The SEI is a layer formed by reactions on an electrode surface, rather than a separator inserted between the positive and negative electrodes.
Key distinction
Distinguish its location and formation mechanism from those of a separator.
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