Operando chemo-mechanical evolution in LiNi_0.8Co_0.1Mn_0.1O₂ cathodes.

ABSTRACT: Ni-rich LiNi _x Co _y Mn _z O₂ (NCMxyz, x + y + z = 1, x ≥ 0.8) layered oxide materials are considered the main cathode materials for high-energy-density Li-ion batteries. However, the endless cracking of polycrystalline NCM materials caused by stress accelerates the loss of active materials and electrolyte decomposition, limiting the cycle life. Hence, understanding the chemo-mechanical evolution during (de)lithiation of NCM materials is crucial to performance improvement. In this work, an optical fiber with με resolution is designed to in operando detect the stress evolution of a polycrystalline LiNi_0.8Co_0.1Mn_0.1O₂ (P-NCM811) cathode during cycling.

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC11344168 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature