Lithium-silver alloys in anode-less batteries: comparison in liquid- and solid-electrolytes

초록

This study comprehensively investigates the phase evolution of silver-carbon composite (Ag/C) layers in anode-less batteries with both liquid and solid electrolytes. The results of in situ X-ray diffraction and cross-sectional electron microscopy analyses reveal that the alloying reaction of Ag and Li is more homogeneous in solid-electrolyte-based cells compared to liquid-electrolyte-based cells. This homogeneity is attributed to diffusional Coble creep across the heterogeneous interfaces of Ag/C layers and solid electrolytes. In situ X-ray characterizations and electron microscopy observations reveal that lithium deposits in anode-less batteries are more homogeneous in solid electrolytes than in liquid electrolytes, attributed to the diffusional Coble creep process.

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