Clarification of Li deposition behavior on anodes with a porous interlayer in Li-free all-solid-state batteries

Abstract

Factors that determine the Li deposition behavior in Li-free ASSBs with a porous interlayer are systemically identified and Li deposition behavior is interpreted based on both thermodynamics and the kinetics.

Design Strategies for Anodes and Interfaces Toward Practical Solid‐State Li‐Metal Batteries

“…For example, as reported by Park et al, all Li deposits do not penetrate composite anodes with small-sized carbon spheres (≈75 nm) at 30 °C, whereas they do so at 60 °C. [95] Similarly, as reported by Kim et al, plated Li-metal remains at the solid electrolyte/graphite interlayer interface at 25 °C, separating them, whereas all the Li metal penetrates into the interlayer and is plated between the interlayer and current collector at 100 °C. [81] These studies highlight the importance of considering the transport kinetics of Li metal in the design of 3D porous architectures.…”

“…CS1, CS2, and CS3 layers indicate carbon-sphere composites with diameters of 1 μm, 350 nm, and 75 nm, respectively. Reproduced with permission [95]. Copyright 2022, The Royal Society of Chemistry.…”

High-areal-capacity anode-free all-solid-state lithium batteries enabled by interconnected carbon-reinforced ionic-electronic composites

“…Recently, regulating lithium metal plating behaviors by the modication of the working surfaces of current collectors has attracted much attention. [29][30][31] The implementation of silver-carbon composites affords impressive high areal capacity and long cycle life. 32 However, their preparation processes are oen complex and the mechanisms remain elusive.…”

On-site formation of silver decorated carbon as an anodeless electrode for high-energy density all-solid-state batteries

“…The Ag–C nanocomposite interlayer is a mixed ionic–electronic conductor that guides Li deposits toward the negative electrode side via diffusional creep. 35 The conduction kinetics of Li metal through the Ag–C interlayer are fast enough to relieve the local stress derived from Li deposits, preventing direct contact between Li and the solid electrolyte and Li dendrite penetration.…”