Ultrafast-Laser Micro-Structuring of LiNi_0.8Mn_0.1Co_0.1O₂ Cathode for High-Rate Capability of Three-Dimensional Li-ion Batteries.

ABSTRACT: Femtosecond ultrafast-laser micro-patterning was employed to prepare a three-dimensional (3D) structure for the tape-casting Ni-rich LiNi_0.8Mn_0.1Co_0.1O₂ (NMC811) cathode. The influences of laser structuring on the electrochemical performance of NMC811 were investigated. The 3D-NMC811 cathode retained capacities of 77.8% at 2 C of initial capacity at 0.1 C, which was thrice that of 2D-NMC811 with an initial capacity of 27.8%. Cyclic voltammetry (CV) and impedance spectroscopy demonstrated that the 3D electrode improved the Li⁺ ion transportation at the electrode-electrolyte interface, resulting in a higher rate capability. The diffusivity coefficient D_Li+, calculated by both CV and electrochemical impedance spectroscop

SUBMITTER: Tran MX 

PROVIDER: S-EPMC9654857 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature