Tailoring Vertically Aligned Inorganic‐Polymer Nanocomposites with Abundant Lewis Acid Sites for Ultra‐Stable Solid‐State Lithium Metal Batteries

Abstract Nanocomposite solid polymer electrolytes are considered as a promising strategy for solid‐state lithium metal batteries (SSLMBs). However, the randomly dispersed fillers in matrix with limited Li + transference number and insufficient ionic conductivity severely sacrifice ion transport capacity, thus restricting their practical application. To tackle these issues, magnetic field‐assisted alignment is proposed to disperse vertically aligned akaganéite nanotube an inorganic‐polymer nanocomposite electrolyte ultra‐stable SSLMBs. The cations Lewis acid sites can grab anions promote dissociation of salts while sufficient oxygen hydroxyl functional group offer abundant Li‐ion migration favored transportation. At same time, akaganéite/polymer interface combined above synergistic effects establish oriented channels inside electrolyte, which significantly elevates its conductivity. Specially, organic‐inorganic dual‐layer solid‐electrolyte formed uniform deposition suppress dendrite growth. beneficial effect network also demonstrated full cell pouch where remarkable 2000 cycles capacity decay 0.012% per cycle be achieved.