Formation of self-limited, stable and conductive interfaces between garnet electrolytes and lithium anodes for reversible lithium cycling in solid-state batteries

Abstract

Modification of the garnet-type solid electrolyte with a 10 nm Sn thin-film improves the contact and wetting performance between the garnet and the lithium metal and, thus enables fast and reversible lithium transport across their interface by forming a self-limited, conductive Li–Sn intermediate layer.

On-surface lithium donor reaction enables decarbonated lithium garnets and compatible interfaces within cathodes

“…In addition, the SSB with an LFP-LLZTO@LCO cathode exhibits longer-term cycling performance than that previously reported (Fig. S21) 4,[25][26][27][28][29] .…”

Electrolytes for Rechargeable Lithium–Air Batteries

“…Lithiophilic materials such as Si, Ge, ZnO, and Al 2 O 3 or polymers such as PVDF‐HFP and PEO are sandwiched at the interface to decrease the interfacial resistance . A Li‐Sn alloy layer was demonstrated to lower the interfacial resistance approximately 20 times . This layer facilitated fast and stable Li transport at high current densities.…”

“…[169,[174][175][176] ALi-Sn alloy layer was demonstrated to lower the interfacial resistance approximately 20 times. [177] This layer facilitated fast and stable Li transport at high current densities. Interestingly,C hen and co-workers [178] enhanced the interfacial connection between garnet SIEs and Li electrodes by simply drawing ag raphite-based soft interface with ap encil.…”

Interface‐Engineered Li7La3Zr2O12‐Based Garnet Solid Electrolytes with Suppressed Li‐Dendrite Formation and Enhanced Electrochemical Performance

“…The role of BMP‐TFSI in the HSE is depicted schematically in Figure e. From the mechanical perspective, the “soft” BMP‐TFSI continuous coating layer, which fills the voids and connects the grain boundaries, can easily form intimate contacts with the “rigid” LLZO oxide and maintain good interfacial compatibility toward lithium metal . Therefore, on the one hand, the coating layer can form a compact and stable interlayer to resist the volume strain at the electrolyte/electrode interface and inside the HSE during cycling . On the other hand, as the short circuit is attributed to the growth of lithium dendrites along the grain boundaries and voids of the electrolyte, the coating layer gives a uniform Li‐ion flux through the interface and thus is effective in suppressing Li‐dendrite growth .…”

“…[37] Therefore, on the one hand, the coating layer can form ac ompacta nd stable interlayer to resistt he volume strain at the electrolyte/electrode interface and inside the HSE during cycling. [38] On the other hand, as the short circuit is attributed to the growth of lithium dendrites along the grain boundaries and voids of the electrolyte, [3e, 39] the coating layer gives au niform Li-ion flux through the interface and thus is effectiveins uppressing Li-dendrite growth. [40] The LLZO powders in this work were sintered only once at 900 8C.…”