Surface Coupling between Mechanical and Electric Fields Empowering Ni-Rich Cathodes with Superior Cyclabilities for Lithium-Ion Batteries.

ABSTRACT: Ni-rich cathodes with high energy densities are considered as promising candidates for advanced lithium-ion batteries, whereas their commercial application is in dilemma due to dramatic capacity decay and poor structure stability stemmed from interfacial instability, structural degradation, and stress-strain accumulation, as well as intergranular cracks. Herein, a piezoelectric LiTaO₃ (LTO) layer is facilely deposited onto Li[Ni_x Co_y Mn_{1- x - y} ]O₂ (x = 0.6, 0.8) cathodes to induce surface polarized electric fields via the intrinsic stress-strain of Ni-rich active materials, thus modulating interfacial Li⁺ kinetics upon cycling. Various characterizations indicate that the electrochemical perf

SUBMITTER: Dai Z 

PROVIDER: S-EPMC9218785 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature