Correlating lithium-ion transport and interfacial lithium microstructure evolution in solid-state batteries during the first cycle

doi:10.1016/j.xcrp.2024.101995

Correlating lithium-ion transport and interfacial lithium microstructure evolution in solid-state batteries during the first cycle

2024-06-01

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DOI：10.1016/j.xcrp.2024.101995

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The formation of heterogeneous Li structures at the anode/solid polymer electrolyte (SPE) membrane interphase of solid-state Li- metal batteries (SSLMBs) is one of the key factors that impede SSLMB performance. The relationship between Li+ +-ion transport kinetics and Li0 0 structural evolution at the buried interphase is critical but challenging to characterize. Here, we report an operando correlative X-ray Compton scattering and computed tomography imaging technique that quantifies the changes of Li+ +-ion concentrations in the bulk cathode, SPE membrane, and anode of the SSLMB full cell using a commercially standard configuration. We then visualize Li+ +-ion concentration distributions as well as Li0 0 microstructures at the buried anode/SPE interphase. Mechanistic analyses show that the Li-stripping step forms more irregular interfacial Li morphologies at the expense of bulk anode volume shrinkage compared to the Li-plating step during the first cycle.

Keywords:

X-RAY-DIFFRACTION

CATHODES

DIFFUSION

CAPACITY

DYNAMICS

GROWTH

Correlating lithium-ion transport and interfacial lithium microstructure evolution in solid-state batteries during the first cycle

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