Boosting the rate performance of lithium-rich cathode materials with W-doping

Abstract

Lithium-rich manganese oxides (LRMs) with high specific capacity are considered as promising cathodes for next-generation lithium-ion batteries. However, their practical application is still hindered by several issues, such as poor rate performance and unexpected voltage fading. Herein, a novel strategy based on W doping via a simple solid-state method was introduced to improve the rate performance and voltage stability of LRMs. As a result, the W doped sample delivers a reversible discharge specific capacity of 183.9 mA h g⁻¹ at 2 C (1 C = 250 mA g⁻¹) and the voltage decay is reduced from 5.80 mV per cycle to 3.70 mV per cycle. This study provides a new approach for improving the electrochemical performance of LRMs via high valence element doping.