Anode

Lithium Metal Anode

Lithium Metal

Surface engineering of inorganic solid-state electrolytes This study aimed to improve the performance of quasi-all-solid-state lithium batteries using Ag coated inorganic solid-state electrolytes (LLZTO). The hypothesis was that employing a Ag coating on LLZTO along with a Ag-C composite interlayer would prevent dendrite penetration, enhance stability, and facilitate higher current density operation. LLZTO solid electrolyte films were prepared via tape casting, and various interlayers, including Ag-C, were coated on the LLZTO surface. Cells with Ag-C interlayers demonstrated enhanced stability and avoided short-circuiting at higher current densities compared those without. The Li|Ag-C/Ag/LLZTO/IL|NCM 333 cell exhibited an impressive initial discharge capacity and retained about 85% capacity after 800 cycles at 1.6 mA/cm2 and 25 °C. The study showed that the interlayers effectively shielded the solid electrolyte, preventing dendrite penetration and allowing substantial capacity retention even after multiple charge-discharge cycles. Surface engineering of solid-state electrolyte LLZTO significantly improves cycling performance of a lithium-metal battery without the need to apply external pressure.

Academia | P. 213 Source: Kim, JS., Yoon, G., Kim, S., Sugata, S., Yashiro, N., Suzuki, S., Lee, M.J., Kim, R., Badding, M., Song, Z., CHang, J., Im, D.

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