Understanding electronic and Li-ion transport of LiNi0.5Co0.2Mn0.3O2 electrodes affected by porosity and electrolytes using electrochemical impedance spectroscopy

Transport Properties in Electrodes for Lithium-Ion Batteries: Comparison of Compact versus Porous NCM Particles

“…The measurement setup is a symmetric cell under blocking conditions, which can distinguish reactions such as ion transport through pores and double layer formation of the effective surface by its frequency response. 18 In particular, the pore network of the electrodes with porous particles and the influence of drying and calendering is investigated, since it is known from previous studies that porous particles can lead to improved electrode properties such as higher rate capability and less dependency on the drying rate for the investigated slurry configuration. 15,16,19,20 On the other hand, electrodes consisting of porous particles have higher porosity and, thus, lower energy density than those with compact particles.…”

Mechanics-based design of lithium-ion batteries: a perspective

“…In other words, the porosity and tortuosity vary dynamically during cycling, especially for silicon-based electrodes whose deformation is huge. [147][148][149][150] Meanwhile, owing to the complicated deformation state of active layers, the porosity and tortuosity may also exhibit anisotropic characteristics, which can further affect the electrochemical performance. By considering these mechanisms, the mesostructure of active layers can be designed, such as gradient designs [151][152][153][154] and hollow designs.…”

Insight into fast lithium diffusion in disordered rock-salt ω-Li3V2O5in a wide temperature range

“…In this work, we utilize electrochemical impedance spectroscopy (EIS), a technique widely employed in quantifying the charge transfer capability of LIBs, [23][24][25][26][27][28][29][30][31][32][33][34] to elucidate the interfacial and kinetic properties of the u-LVO anode. The Li + diffusion coefficient, interface formation, and lithiation steps of the u-LVO anode are revealed.…”