Why Solid State Batteries Short
Researchers led by Dr. Yuwei Zhang have published a paper explaining why solid state batteries are prone to short circuits during charging. The team found that hydrostatic stress causes lithium dendrites to act like a water jet, enabling them to penetrate the hard ceramic electrolyte.
Solid state batteries employ a solid electrolyte and a lithium anode. Lithium metal from the anode sometimes forms dendrites that penetrate the ceramic electrolyte and cause it to crack. Dr. Yuwei Zhang's team showed that hydrostatic stress made the lithium dendrites act like a water jet, enabling them to penetrate the hard ceramic. Understanding the root cause is a step towards improving the technology. The team published their findings in a paper. Further work is needed to figure out strategies to prevent short circuits.
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