Construction of uniform MgO nanoshells for improved high-voltage performance of Li-ion batteries†

Abstract

A conformal Mg(OH)₂ nanoshell was constructed through a wet-chemical process, where a gradual release of OH⁻ as the precipitating agent was designed to ensure the heterogeneous growth of the coating species. Such a coating treatment was found to be efficient in improving the structural stability and electrochemical stability of a 5 V LiNi_0.5Mn_1.5O₄ cathode.