“A room-temperature chemical process is developed to convert brass and steel into functional electrodes for rechargeable energy storage that transforms these multicomponent alloys into redox-active iron oxide and copper oxide materials. The resulting steelâ€“brass battery exhibits cell voltages up to 1.8 V, energy density up to 20 Wh/kg, power density up to 20 kW/kg, and stable cycling over 5000 cycles in alkaline electrolytes.”
See From the Junkyard to the Power Grid: Ambient Processing of Scrap Metals into Nanostructured Electrodes for Ultrafast Rechargeable BatteriesNot since the evil sorcerer tried to obtain Aladdin’s Lamp by offering new lamps for old has there been such a story. Scrap steel which is a byproduct of welding, machining and eventual scrapping of all kinds of steel machinery and materials, and scrap brass, produced in copious amounts at shooting ranges and recycling of all kinds of goods made of brass ( an alloy of copper and zinc ) are cheap and plentiful. I have many kilos of the stuff just hanging around. My welding stubs and cutoffs are a steady supply of steel scrap. My collecting at shooting ranges and out in the fields and forests amounts to kilograms per annum. Electricians produce a fair bit of waste copper annually too. The stuff is available for pennies a pound if I wanted larger quantities.
That one can make decent heavy discharge/frequent recycling storage batteries from such cheap stuff is absolutely wonderful. I may not need to import NiFe batteries from India or China to go solar/wind… This is so cool.