Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 5, 2024

Abstract To advance the sustainable development of Li‐ion batteries, reducing Co content in Li[Ni x y (Mn or Al) (1– – ) ]O 2 has become essential, prompting exploration Co‐free Mn alternatives. Among promising solutions are layered cathodes with compositional concentration gradients, which offer significant potential. However, their unique microstructure and partitioning, key to performance, highly sensitive synthesis temperatures. Over‐sintering can lead structural unpredictability cathode materials detrimental effects on electrochemical properties. In this study, a stable oxide is developed by doping gradient 0.9 0.1 , high‐valence ions. This innovative strategy significantly reduces sensitivity calcination temperatures, minimizing nano‐ microstructural changes across broad temperature range (750–810 °C). The particle‐level gradation grain‐level heteroelement encapsulation contribute material's exceptional performance. Mo doping, trace amounts, plays pivotal role maintaining stability cathodes, enabling high‐potential (4.3 V vs graphite) suitable for practical battery applications.

Язык: Английский