Highly Stable 4.6 V LiCoO₂ Cathodes for Rechargeable Li Batteries by Rubidium-Based Surface Modifications.

ABSTRACT: Among extensively studied Li-ion cathode materials, LiCoO₂ (LCO) remains dominant for portable electronic applications. Although its theoretical capacity (274 mAh g^-1 ) cannot be achieved in Li cells, high capacity (≤240 mAh g^-1 ) can be obtained by raising the charging voltage up to 4.6 V. Unfortunately, charging Li-LCO cells to high potentials induces surface and structural instabilities that result in rapid degradation of cells containing LCO cathodes. Yet, significant stabilization is achieved by surface coatings that promote formation of robust passivation films and prevent parasitic interactions between the electrolyte solutions and the cathodes particles. In the search for effective coatings, the authors propose RbAlF₄ modified LCO particl

SUBMITTER: Fan T 

PROVIDER: S-EPMC9685477 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature