Chinese team develops low-cost amorphous sodium solid electrolyte

This matters because it targets two chronic bottlenecks in solid-state sodium batteries at once: electrolyte cost and processing complexity. A one-step mechanochemical route using cheap precursors, paired with stable cycling and strong low-temperature retention, points to a more manufacturable path than many lab-scale halide systems. The work sits squarely in the sodium-ion and solid-state space, where cost per kWh is the competitive battleground against lithium. The open questions are whether conductivity and cycling hold up at scale and in larger cells, and whether the amorphous halide approach attracts industrial partners beyond the lab.