The article "Promises and Challenges of Next-Generation ‘Beyond Li-ion’ Batteries for Electric Vehicles and Grid Decarbonization" by Tian et al. discusses the advancements, challenges, and opportunities in four key "beyond Li-ion" battery technologies: Na-ion batteries, K-ion batteries, all-solid-state batteries, and multivalent batteries. The authors highlight the potential of these technologies to address the limitations of lithium-ion batteries, particularly in terms of cost, energy density, and resource availability. They provide a detailed analysis of the fundamental science behind each technology, including the materials used, their electrochemical properties, and the challenges they face. The article also explores the potential solutions to these challenges, such as the use of polyanionic compounds and Prussian blue analogues for cathodes, and the advantages of using Mg and Ca as multivalent ions. While acknowledging that no single "beyond Li-ion" technology will fully replace Li-ion batteries in the near future, the authors emphasize the importance of these technologies in scaling up energy storage for large-scale applications like electric vehicles and grid storage.The article "Promises and Challenges of Next-Generation ‘Beyond Li-ion’ Batteries for Electric Vehicles and Grid Decarbonization" by Tian et al. discusses the advancements, challenges, and opportunities in four key "beyond Li-ion" battery technologies: Na-ion batteries, K-ion batteries, all-solid-state batteries, and multivalent batteries. The authors highlight the potential of these technologies to address the limitations of lithium-ion batteries, particularly in terms of cost, energy density, and resource availability. They provide a detailed analysis of the fundamental science behind each technology, including the materials used, their electrochemical properties, and the challenges they face. The article also explores the potential solutions to these challenges, such as the use of polyanionic compounds and Prussian blue analogues for cathodes, and the advantages of using Mg and Ca as multivalent ions. While acknowledging that no single "beyond Li-ion" technology will fully replace Li-ion batteries in the near future, the authors emphasize the importance of these technologies in scaling up energy storage for large-scale applications like electric vehicles and grid storage.