Prospects and Strategies for Single-Crystal NCM Materials to Solve All-Solid-State Battery Cathode Interface Problems

In the ongoing quest to develop lithium-ion batteries with superior capacity and enhanced safety, the focus has shifted toward all-solid-state batteries (SSBs) and nickel-rich cathode materials. Despite their promise, these technologies face significant interface challenges, notably poor contact and low ion transport efficiency, leading to substantial stability issues. This review aims to provide a comprehensive analysis of both the advantages and the challenges associated with all-solid-state batteries. In addition, it discusses the benefits of single-crystal application in SSBs, in terms of their kinetic performance, mechanical properties, and stability. The review concludes by proposing various strategies to optimize single-crystal technologies, targeting the development of efficient nickel-rich single-crystal materials for use in all-solid-state batteries. These approaches offer the potential to address the core challenges currently faced by SSBs and pave the way for the next generation of high-performance batteries. This article starts with the advantages and disadvantages of all-solid-state battery electrolyte cathode materials and summarizes the advantages and challenges of single-crystal cathodes in solving all-solid-state battery interface problems. The impact of single-crystal cathode morphology on the design of high-performance all-solid-state batteries is then discussed. Finally, future research on all-solid-state batteries based on single crystal cathode is prospected. image