MIT study reveals why solid-state batteries fail: dendrites grow at lower stresses than thought
By
Zach Winn | MIT News
Summary
MIT researchers discovered that dendrites—cracks that degrade solid-state battery performance—can grow at far lower stresses than previously understood. Using direct measurement techniques, they found that ceramic electrolytes weaken dramatically during charging, becoming as brittle as a lollipop compared to their tooth-like toughness at rest. This explains why developing stronger electrolytes alone hasn't solved the dendrite problem, and points to the need for more chemically stable materials to fulfill the promise of solid-state batteries.
Source
Twitter / XMIT study reveals why solid-state batteries fail: dendrites grow at lower stresses than thoughtnews.mit.eduKey quotes
· 2 pulledDirect measurement techniques allowed us to see how tough the material is as we cycle the cell
What we saw was that if you just test the ceramic electrolyte on the benchtop, it's about as tough as your tooth. But during charging, it gets a lot weaker — closer to the brittleness of a lollipop.
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