RESUMO
All-solid-state batteries (ASSBs) that employ anode-less electrodes have drawn attention from across the battery community because they offer competitive energy densities and a markedly improved cycle life. Nevertheless, the composite matrices of anode-less electrodes impose a substantial barrier for lithium-ion diffusion and inhibit operation at room temperature. To overcome this drawback, here, the conversion reaction of metal fluorides is exploited because metallic nanodomains formed during this reaction induce an alloying reaction with lithium ions for uniform and sustainable lithium (de)plating. Lithium fluoride (LiF), another product of the conversion reaction, prevents the agglomeration of the metallic nanodomains and also protects the electrode from fatal lithium dendrite growth. A systematic analysis identifies silver (I) fluoride (AgF) as the most suitable metal fluoride because the silver nanodomains can accommodate the solid-solution mechanism with a low nucleation overpotential. AgF-based full cells attain reliable cycling at 25 °C even with an exceptionally high areal capacity of 9.7 mAh cm-2 (areal loading of LiNi0.8 Co0.1 Mn0.1 O2 = 50 mg cm-2 ). These results offer useful insights into designing materials for anode-less electrodes for sulfide-based ASSBs.
RESUMO
We propose a silver precursor with in situ reduction under an adhesive substrate with a silver precursor penetration effect. It shows a high durability under mechanical deformation resulting from the composite form of the Ag-penetrated electrode adhesive. This stretchable electrode in which the silver particles are tightly penetrated into the adhesive with a confining effect can be used for various purposes since it offers water-proof properties and a high mechanical stability up to 70% strain, radius of curvature 0.5 mm ( R/ R0< 1.5), and electrical resistance of 0.58 ± 0.063 kΩ â¡-1 by adhering to the multipurpose application.
