Phosphate and Borate-Based Composite Interface of Single-Crystal LiNi_0.8Co_0.1Mn_0.1O₂ Enables Excellent Electrochemical Stability at High Operation Voltage.

ABSTRACT: The application of nickel-rich cathodes in lithium-ion batteries has been hampered by its rapid capacity/voltage fading and limited performance of rate. In this work, a passivation technique is used to create a stable composite interface on single-crystal LiNi_0.8Co_0.1Mn_0.1O₂ (NCM811) surface, which greatly improves the cycle life-span and high-voltage constancy of cathode with 4.5 and 4.6 V cut-off voltage. The improved Li⁺ conductivity of the interface enables a firm cathode-electrolyte interphase (CEI), which reduces interfacial side reactions, lowers the risk of safety hazards, and improves irreversible phase transitions. As a result, the electrochemical performance of single-crystal Ni-rich cathode are remarkably enhanced. The spec

SUBMITTER: Long F 

PROVIDER: S-EPMC10224527 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature