Durable Sb/Na co-doped lithium-rich cathode material prepared by a novel planetary griding method

Abstract

Nano-sized cathode materials are recognized for their enhanced active reaction area and uniform chemical composition, leading to distinct electrochemical performance benefits. However, the conventional sol–gel methods used for nanomaterial synthesis are often marred by significant raw material wastage and lengthy preparation processes, limiting their practicality. This study introduces a straightforward planetary grinding approach using low-melting-point precursors for the synthesis of oxide cathodes for lithium batteries. Through this method, an antimony and sodium co-doped lithium-rich layered oxide was produced, showcasing an impressive specific capacity of 238.48 mAh/g at a current density of 0.2 C (50 mA/g). Furthermore, this material exhibited outstanding cycle performance, maintaining 97.5 % capacity retention after 500 cycles at 1 C, with a specific capacity of 190.54 mAh/g in the final cycle.