Implication of Non-Uniform Anode Particle Morphology on Lithium-Ion Cell Performance

Abstract

The present works deals with the implications of non-uniform anode particle morphology on charging and discharging characteristics of Lithium-ion cell, especially for ultra-fast charging applications. The one-dimensional isothermal model is employed to analyze the effect of C-rate, porosity, tortuosity, and particle geometry for a range of non-uniform anode particle size distribution numerically. Our study reports that the value of capacity and specific power of the cell is found to be maximum when the particle size decreases along the electrode length. In contrast, capacity and specific power are minimum when anode particle size increase along the anode length. Moreover, a significant improvement in the performance of the Lithium-ion battery is found at ultra-fast charging when non-uniform particle distribution is employed. Additionally, a strong interplay of particle distribution and microstructural attributes viz. porosity and tortuosity on cell performance are revealed for the charging-discharging cycle. Further, the capacity of the cell is found to be maximum when the particle geometry is spherical. We anticipate that the results can inspire further improvement in ionic transport for ultrafast charging with non-uniform microstructure in the Li-ion cell.

Self-Structured Binder Confinement of Sulfur for Highly Durable Lithium-Sulfur Batteries

“…This is attributed to the doctor blade-induced larger particle size and broader particle size distribution in the electrodes, as well as the higher density of the electrodes, which act together to decrease the active surface area, and thus the utilization of sulfur. Slurry atomization through the spray coating technique creates smaller and more uniformly sized particles, as well as a more open structure due to the multilayer arrangement of particles, which favors a faster conversion reaction, leading to better material utilization and higher capacity. − …”

Tuning the Particle Size Distribution at Cathode for Enhanced Li-Ion Battery Performance

“…This non-uniformity in particle size distribution in porous electrodes likely induces variation in transport characteristics. Note that the "Reference Case" is the one in which particle size distribution is uniform at the cathode, while the anode particle distribution is taken non-uniform and adopted from our earlier work [47]. Herein, it can be noted from Fig.…”

Porous Electrode Modeling and its Applications to Li‐Ion Batteries

“…Optimizing the particle size in porous electrodes will help to maximize the energy and power density and fast charging capability. [ 127 ]…”

“…Appian et al [123] simulated the electrochemical performance of Li In addition to modeling electrodes with different kinds of active materials, simulating the same active materials with different particle geometries might also be very useful to further optimize the electrode performance. [35,108,126,127] It was found that small particles are preferred for fast charging as compared to the larger particles. [35,126] This effect is related to Li diffusion inside electrodes.…”