Lab creates world's first anode-free sodium solid-state battery

https://techxplore.com/news/2024-07-lab-world-anode-free-sodium.html

"eco-friendly, fast-charging, stable for 100's of cycles... anode-free enables higher cell voltage, lower cell cost, energy density of lithium, but lacks good contact between the electrolyte and the current collector... aluminum powder current collector densified under high pressure forms solid current collector while maintaining liquid-like (actual liquid electrolytes create interphase buildup reducing battery's usefulness) contact with electrolyte enabling it to surround electrolyte and allowing low-cost, high-efficiency cycling"

Related: Using sodium to make more sustainable batteries
https://techxplore.com/news/2024-07-sodium-sustainable-batteries.html