Electric cars powered by potato batteries sounds like a headline hatched at a marketing meeting after too many team-building fry nights. The idea is delightfully tactile: insert zinc and copper electrodes into a tatty spud, harvest a few volts, and watch an EV glide silently down the motorway on starch and sunshine. Charming, but scientifically whimsical.
At heart, a potato battery is an electrochemical cell. The potato’s electrolytes enable ions to flow between...
