Reasonable Design of High-Energy-Density Solid-State Lithium-Metal Batteries

Higher energy storage in the limited space of lithium batteries always brings more safety hazards. To address this issue, the utilization of solid electrolyte to replace the liquid one is a promising strategy. However, the sluggish charge transfer and poor interfacial compatibility between solid electrodes and solid electrolyte severely hinder the performance of high-energy-density solid-state lithium batteries. Thus, in this Perspective, the bottlenecks and the related solutions regarding organic/inorganic composite electrolyte, lithium-metal anode, and high-voltage cathode are focused on, and compatible interface engineering is presented. Aiming at the commercialization of high-energy-density solid-state lithium-metal batteries, possible strategies on tackling the remaining challenges of manufacturing scale are also highlighted.