Bumpy battery surfaces can masquerade as nanoscale ion pathways, misleading material design
A signal that appears to show ions moving inside a battery may, in fact, be an illusion caused by an uneven surface. A KAIST research team has identified the origin of this type of artifact, which can lead researchers to misinterpret what is happening inside a battery, and has developed a method to reduce it.
A research team from KAIST has identified a misleading artifact that can appear during nanoscale battery analysis, leading researchers to mistakenly interpret ion movement. This artifact is caused by uneven battery surfaces which can create false signals of ion transport even when no ions are moving. The team proposes a method to smooth battery material surfaces using a cooling cross-section polisher with an argon ion beam, which significantly reduces surface roughness and measurement artifacts.
This discovery is crucial for accurately determining ion movement within batteries, improving battery performance and lifespan, and developing advanced battery materials such as solid-state and sodium-ion batteries.
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