Overview
- The Max Planck Institute team reports that pressure building inside soft lithium filaments cracks stiff garnet electrolytes, which leads to short circuits.
- The work targets a key weak spot in solid-state cells for cars and phones, where dendrite-driven cracks still block large-scale use.
- The researchers prepared and imaged samples in vacuum at cryogenic temperatures to avoid air, moisture, and microscope beam artifacts.
- The team saw no lithium buildup ahead of a dendrite tip, which they say rules out an electron-leak grain boundary seeding model for their samples.
- The Register notes an MIT Nature study that observed ion flow that embrittles the ceramic at dendrite tips, pointing to electrochemistry that can aid fracture alongside mechanics.