Cell Design for Practical High‐Energy Lithium Metal Battery

Abstract Batteries with Li metal anode show excellent promise for energy storage because of their high capacity, compatibility with Li‐free cathodes (such as sulfur (S) and oxygen (O 2 )), and environmental friendliness. However, their coulombic efficiency is low, dendrite formation is unsafe, side reactions are serious, and the long‐term service life is an issue. Therefore, taking the cell design for a practical high‐energy lithium metal battery as an example, this review discusses four major challenges for the cell design of a high‐energy lithium metal battery, which include the anode design, the separator design, the cathode design, and the external fields. Based on these contents, several key points for practical applications. of high‐energy LMBs are outlined, including battery assembly and manufacturing, energy density, cell designs for LMBs with various electrolyte systems, economic perspective on the cell design, and battery management system.