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Which outcome occurs when high current passes through a solid-state battery with insufficient lithium ion conductivity?

A)Dendrite formation leading to short circuit
B)Electrolyte decomposition and gas evolution
C)Increased cell impedance and voltage drop
D)Thermal runaway due to exothermic reactions

💡 Explanation

When current passes through a solid-state battery with poor Li+ conductivity, lithium ions accumulate unevenly, promoting dendrite formation because increased electric field enhances Li plating. Therefore dendrite formation short circuits the cell, not necessarily complete decomposition, increased impedance, or thermal runaway which require different conditions.

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