China’s solid-state EV battery breakthrough shows stable performance over 1,200 hours
The alloy’s effectiveness stems from its low eutectic point and high lithium solubility.
Researchers at China’s Huazhong University of Science and Technology have announced a solution to a long-standing challenge hindering the commercialization of all-solid-state lithium metal batteries.
The team has created a novel mixed ion-electron conducting (MIEC) LixAg alloy anode that stabilizes the critical interface between lithium metal and garnet-type solid electrolytes, which could lead to safer, higher-energy-density batteries.
“The technology could enable the next generation of electric vehicles with longer ranges, faster charging capabilities, and enhanced safety profiles,” said the researchers in a press release.
Addressing the instability issue
The unstable interface between lithium metal anodes and solid electrolytes, particularly materials like Li6.5La3Zr1.5Ta0.6O12 (LLZTO), has been a major bottleneck for years.
This instability leads to poor lithium diffusion and the formation of lithium dendrites, which can cause short circuits and limit battery life.
“What makes this approach revolutionary is how it fundamentally changes lithium ion movement at the critical interface,” explain the researchers.
“The LixAg alloy creates a pathway for lithium ions that dramatically enhances diffusion kinetics, preventing the concentration gradients that typically lead to dendrite formation and interface degradation.”