Structural Evolution and Transition Dynamics in Lithium Ion Battery under Fast Charging: An Operando Neutron Diffraction Investigation.

ABSTRACT: Fast charging (<15 min) of lithium-ion batteries (LIBs) for electrical vehicles (EVs) is widely seen as the key factor that will greatly stimulate the EV markets, and its realization is mainly hindered by the sluggish diffusion of Li⁺ . To have a mechanistic understanding of Li⁺ diffusion within LIBs, in this study, structural evolutions of electrodes for a Ni-rich LiNi_0.6 Mn_0.2 Co_0.2 O₂ (NMC622) || graphite cylindrical cell with high areal loading (2.78 mAh cm^-2 ) are developed for operando neutron powder diffraction study at different charging rates. Via sequential Rietveld refinements, changes in structures of NMC622 and Li_x C₆ are obtained during moderate and fast charging (from 0.27 C to

SUBMITTER: Wu X 

PROVIDER: S-EPMC8564430 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature