Mei Yu, Liu Junxiang, Cui Tony, Li Yujin, Liu Tongchao, Ji Xiaobo, Amine Khalil
Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, 60439, USA.
College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China.
Adv Mater. 2025 Jun;37(23):e2411311. doi: 10.1002/adma.202411311. Epub 2024 Oct 14.
High-voltage cathodes (HVCs) have emerged as a paramount role for the next-generation high-energy-density lithium-ion batteries (LIBs). However, the pursuit of HVCs comes with inherent challenges related to defective structures, which significantly impact the electrochemical performance of LIBs. The current obstacle lies in the lack of a comprehensive understanding of defects and their precise effects. This perspective aims to provide insights into defect chemistry for governing HVCs. The classifications, formation mechanisms, and evolution of defects are outlined to explore the intricate relationship between defects and electrochemical behavior. The pressing need for cutting-edge characterization techniques that comprehensively investigate defects across various temporal and spatial scales is emphasized. Building on these fundamental understandings, engineering strategies such as composition tailoring, morphology design, interface modification, and structural control to mitigate or utilize defects are thoroughly discussed for enhanced HVCs performance. These insights are expected to provide vital guidelines for developing high-performance HVCs for next-generation high-energy lithium-ion batteries.
