Wattage from wine: Food waste offers huge breakthrough for lithium-ion batteries

https://uk.finance.yahoo.com/news/wattage-wine-food-waste-offers-134717434.html

"cheap, sustainable, increased energy storage capability... fruit, winemaking compounds (malic, tartaric acid) from food waste streams replace graphite electrode... food acids produce water-soluble metal dicarboxylate electrode materials"