Recent advances on low-Co and Co-free high entropy layered oxide cathodes for lithium-ion batteries

Abstract

As the price of the precious metal cobalt continues to rise, there is an urgent need for a cobalt-free or low-cobalt electrode material to reduce the cost of lithium-ion batteries, which are widely used commercially, while maintaining their performance as much as possible. With the introduction of the new concept of high entropy materials into the battery field, low cobalt and cobalt free high entropy novel lithium-ion batteries have attracted great attention. It possesses important research value to use high entropy materials to reduce the use of cobalt metal in electrode materials. In this perspective, the comparison between the new cathode materials of low cobalt and cobalt-free high entropy lithium-ion battery and traditional cathode materials and the latest progress in maintaining structural stability and conductivity are introduced. It is believed that low cobalt and cobalt-free and high entropy layered oxides can be used to replace the function of cobalt in the cathode materials of lithium-ion batteries. Finally, the future research directions and the synthesis method of high entropy cathode materials for lithium-ion batteries are also discussed.

A Novel and Convenient Sol‐Gel Approach for the Synthesis of High‐Performance LiNi1/3Co1/3Mn1/3O2 Cathode Materials in Lithium‐Ion Batteries

“…The local magnification image in Figure 4c shows that LNCM‐850/12 has the smallest mid‐frequency arc diameter, followed by LNCM‐850/10, LNCM‐850/14, LNCM‐850/16, LNCM‐850/8, and LNCM‐850/6. This implies that the LNCM‐850/12 electrode has the lowest charge transfer resistance, allowing Li + transport and diffusion during the electrode reactions, resulting in faster charging and discharging capabilities, [67,68] which is consistent with the electrochemical performance results obtained.…”