KETEP 세계에너지시장정보

Researchers at Argonne National Laboratory and other institutes worldwide recently introduced a strategy that could improve the structural stability and reliability of ultrahigh-Ni cathodes. This strategy, outlined in a paper published in Nature Energy, entails the use of epitaxial entropy-assisted oxide coating to suppress strain propagation, the process that typically underpins the cathodes' structural deterioration during battery fast-charging and prolonged cycling.

"Surface reconstruction and the associated severe strain propagation have long been reported as the major cause of cathode failure during fast charging and long-term cycling," Chen Zhao, Chuanwei Wang and their collaborators wrote in their paper. "Despite tremendous attempts, no known strategies can simultaneously address the electro-chemomechanical instability without sacrificing energy and power density.