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Which battery chemistry offers the highest energy density for electric vehicles?
- Lead-acid
- Nickel-Metal Hydride
- Lithium-ion
- Sodium-ion
Answer: Lithium-ion
Li-ion batteries (150-250 Wh/kg) provide superior energy density, cycle life, and power-to-weight ratio vs. alternatives. Dominant in EVs, smartphones, grid storage. Research focuses on solid-state Li-ion for enhanced safety. [[MNRE Reports, NCERT Chemistry Class 12]]