Interface between Lithium Metal and Garnet Electrolyte: Recent Progress and Perspective

Abstract

Garnet electrolytes (GEs) with high ion conductivity, excellent stability against lithium metal (LM) as well as wide electrochemical potential window are attracting increasing interest as they have the potential to enable all-solid-state Li metal batteries (ASSLMBs). However, GEs-based ASSLMBs deeply suffer from daunting problems such as high resistance, fast short circuit, and rapid performance degradation, which can be largely attributed to unsatisfactory LM/GE interface. To this end, this minireview focuses on the LM/GE interface by summarizing the main challenges comprehensively, recapitulating emerging strategies for these challenges, and providing perspectives for future research.

Multi-length scale microstructural design of lithium-ion battery electrodes for improved discharge rate performance

“…For the ASSBs, the transport percolation in the ion and electron-conducting phases can be significantly improved via architecture tuning and volume fraction refinement between the active material, conductive carbon and solid electrolyte. Moreover, the morphological evolution both at the electrode/electrolyte interface 58 (e.g. wetting, voids, etc) and within the solid state electrolyte 59 (cracks) under high rate operating conditions can be captured in-operando and modelled to assist the material optimization.…”

Simultaneously Enhancing the Redox Potential and Stability of Multi-Redox Organic Catholytes by Incorporating Cyclopropenium Substituents

“…For the 2-DAC / 3 battery, the initial material utilization was ∼72%, the Coulombic efficiency was >99%, and the energy efficiency was ∼62% (Figure d). − This battery shows 80% retention of the initial capacity after 250 cycles. , This flow cell provides one of the highest theoretical molar energy densities (∼92 W h/mol) reported for an RFB, even with the moderate reduction potential anolyte (see Supporting Information section V for detailed comparison). ,, The CVs after cycling (Figure e) demonstrate that there is <5% crossover over the ∼63 h of this experiment, consistent with the cationic DAC substituents limiting crossover through the anion exchange membrane.…”

Advances of Carbon-Based Materials for Lithium Metal Anodes

“…The liquid electrolyte is composed of solvent, lithium salt and additives, which determine the uniformity and stability of SEI film. Therefore, modifying the additives can improve the performance of the electrolyte, then changing the deposition morphology of lithium (Tao et al, 2017;Wang et al, 2020).…”