Integration of a low-tortuous electrode and an in-situ-polymerized electrolyte for all-solid-state lithium-metal batteries

All-solid-state lithium batteries have attracted great attention because of their high safety, considerable energy density, and long lifespan. However, poor interfacial contact between the electrolyte and electrode has hindered its development. Here, we design the integration of a low-tortuous electrode and an in-situ-polymerized electrolyte for all-solid-state lithium-metal batteries. Vertically aligned channels are produced in electrode materials using the ice-templating method, and then a solid polymer electrolyte is penetrated into aligned porous channels of the electrodes by in situ UV-curing polymerization. The lithium metal cells using the electrode and electrolyte integration exhibit excellent discharge specific capacity and cycle stability at room temperature. This superior electrochemical performance is because of the good electrode/electrolyte interfacial contact and fast ion-diffusion kinetics in the electrode. This work provides a simple, efficient, and practical strategy to fabricate high-energy-density solid-state batteries.