Why Do EV Batteries Lose Power When You Accelerate Hard — and What's the Fix?

Thicker cathodes can improve range but slow lithium-ion movement under heavy acceleration. A KRICT lab additive improved high-rate discharge, though production use remains years away.

Battery makers often use thicker cathodes to store more energy, but those thicker electrodes can create an ion “traffic jam” when a driver demands power quickly, limiting acceleration even when plenty of charge remains. Researchers at Korea's KRICT reported a possible laboratory fix: adding just 0.5% porous graphitic carbon nitride to a dry-made cathode reduced the energy lithium ions needed to move by 56% and increased high-rate discharge capacity by about 166%. If it scales, the approach could help future EV packs deliver both longer range and stronger acceleration, while dry manufacturing may also lower production costs.

The important limit is timing: these results come from early-stage lab cells, not a production battery, so practical deployment is likely years away.