Researchers at the Institute of Chemistry of the Chinese Academy of Sciences have developed a composite solid electrolyte capable of detecting lithium dendrite formation. This material acts as an early warning system for potential short circuits and thermal runaway within batteries.
The team, led by Guo Yuguo, designed the electrolyte to mimic the electrochemical signal conversion found in biological neurons. The composite material consists of inorganic solid electrolyte nanoparticles that act as sensors, embedded within a protective polymer layer.
During normal operation, the polymer layer prevents direct contact between the inorganic components and the lithium metal. When dendrites penetrate the polymer and reach the inorganic particles, a chemical reaction occurs, generating a measurable electrical voltage signal.
This technology shifts battery safety from passive suppression to active monitoring. It allows for the detection of internal defects before a major short circuit occurs, which is critical for electric vehicles and large-scale energy storage systems.
