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Which mechanism limits the charging rate in lithium-ion batteries?

A)Hydrogen evolution at the cathode
B)Lithium plating on the anode
C)Electrolyte oxidation at high voltage
D)Separator degradation during cycling

💡 Explanation

Hydrogen evolution at the cathode limits charging rates because the reduction of protons forms hydrogen gas, rather than promoting lithium intercalation; therefore, this side reaction reduces cell efficiency and creates safety concerns, rather than desirable lithium-ion insertion.

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