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Studies pinpoint why solid-state batteries develop internal short circuits

Two separate papers in Nature and Nature Nanotechnology trace failures to lithium buildup that cracks the electrolyte and microscopic electrical imbalances that trigger lithium structure growth.

Reported · Written up by our desk · Energy Transition

OilPrice reports that researchers have identified the physical mechanisms behind the internal short circuits that have repeatedly plagued solid-state batteries and delayed commercialization for years.

One study, published in Nature by scientists at Germany’s Max Planck Institute for Sustainable Materials, found that lithium deposits generate significant internal pressure during charging, eventually cracking the solid electrolyte from within.

A second study, in Nature Nanotechnology, involving researchers from MIT, the Technical University of Munich, and other institutions, attributed short-circuit conditions to tiny electrical imbalances inside the electrolyte that enable unwanted lithium structures to begin growing.

Together, the findings turn a longstanding “why” problem into a more defined engineering question, addressing how lithium structures form and penetrate the barrier designed to separate a battery’s positive and negative sides.

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