What question did this study set out to answer?

To investigate the lithium plating and stripping mechanisms at initially lithium-free solid electrolyte interfaces and identify the degradation modes governing failure in anode-free solid-state batteries.

February 12, 2023Advanced Energy MaterialsOpen Access

Accelerated Short Circuiting in Anode‐Free Solid‐State Batteries Driven by Local Lithium Depletion

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To investigate the lithium plating and stripping mechanisms at initially lithium-free solid electrolyte interfaces and identify the degradation modes governing failure in anode-free solid-state batteries.
Plated commercially relevant quantities of lithium (>5 mAh cm⁻²) at 1 mA cm⁻² onto Li6PS5Cl sulfide solid-state electrolytes without excess lithium anodes.
Characterized interfacial dynamics and structural degradation using cryogenic focused ion beam (cryo-FIB) imaging, synchrotron X-ray tomography, and phase-field modeling.
Nonuniform stripping causes localized lithium depletion, isolating lithium domains, shrinking the electrochemically active area, and generating interfacial voids.
Local current density spikes at depleted sites accelerate lithium filament growth and premature short circuiting relative to lithium-excess cells, despite comparable Coulombic efficiencies.
Retaining a thicker residual lithium layer at the solid electrolyte interface suppresses localized depletion and enhances resistance to short circuiting.

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Implication

Multimodal study reveals that local lithium depletion drives short circuiting in anode-free solid-state batteries, highlighting the need to retain uniform lithium at electrolyte interfaces.

Cite This Study

Lewis et al. (2023) studied this question.

synapsesocial.com/papers/6a029db91abe013fb89e23a3 https://doi.org/10.1002/aenm.202204186

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Implication

Multimodal study reveals that local lithium depletion drives short circuiting in anode-free solid-state batteries, highlighting the need to retain uniform lithium at electrolyte interfaces.

Accelerated Short Circuiting in Anode‐Free Solid‐State Batteries Driven by Local Lithium Depletion

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Discussion

Implication

Cite This Study

Accelerated Short Circuiting in Anode‐Free Solid‐State Batteries Driven by Local Lithium Depletion

Key Points

Discussion

Implication

Cite This Study

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