Did Scientists Just Solve The Biggest Mystery Holding Back Solid-State Batteries
LNG Shipments Through Strait of Hormuz Grind to a Halt as Conflict Escalates Alex Kimani is a veteran finance writer, investor, engineer and researcher for Safehaven.com.
Scientists now know why solid-state batteries have repeatedly failed.
Two separate studies have identified the physical processes responsible for the short circuits that have delayed commercialization for years, turning one of the industry’s biggest unknowns into adefined engineering problem.
For years, engineers knew how solid-state batteries were failing, but not why.
The batteries repeatedly developed internal short circuits as microscopic lithium structures formed inside the cell and eventually pierced the barrier separating the battery’s positive and negative sides.
Researchers could see what was happening after the fact, but they couldn’t explain what caused those structures to form or how they managed to penetrate a material specifically designed to block them.
Two independent research teams have now answered different parts of that question.
In a paper published inNature, scientists at Germany’s Max Planck Institute for Sustainable Materials found that lithium deposits generate enormous internal pressure during charging, eventually cracking the solid electrolyte from within.
Separately, researchers fromMIT, the Technical University of Munich, and collaborating institutions reported inNature Nanotechnologythat tiny electrical imbalances inside the electrolyte create the conditions that allow the unwanted lithium structures to begin growing.
The findings could remove a major scientific uncertainty just as automakers and battery manufacturers are investing billions of dollars to bring solid-state batteries into commercial production.
Solid-state batteries are widely regarded as thenext major advancein battery technology because they promise to deliver longer driving ranges, faster charging, improved safety, and higher energy density than today’s lithium-ion batteries.
Replacing the liquid electrolyte with a solid material also reduces the risk of overheating and allows manufacturers to pack more energy into the same physical space, making the technology attractive not only for EVs, but also for aviation, defense, and grid-scale energy storage.
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