The findings may be used as quantitative guidelines in the development and design of more advanced Li-ion batteries.
Lithium-ion batteries have been widely applied in various portable consumer electronics.
Various chemistries have been considered for the fabrication of cathode materials for lithium-ion batteries.
Improving the design of batteries to realize maximum energy and power performance requires a thorough understanding of how physical properties of electrode materials such as species diffusivity and electric conductivity, operational parameters like charge/discharge rate, and cell structural parameters like electrode thickness and particle size of solid active materials influence the cell performance. Effects of electrode thickness established a mathematical model for the study of particle size distribution (PSD) effects on discharge behaviors of intercalation electrode systems.
To elucidate the relevant mechanisms, two groups of characteristic parameters were proposed.
The first group contains three characteristic time parameters, namely: (1) t, describing the local Li-ion depletion rate in electrolyte phase at the electrolyte/electrode interface due to electrochemical reactions.
Main factors that retard the growth of lithium-ion battery include underutilization, stress-induced material damage, capacity fade, and possible occurrence of thermal runaway.
In addition, temperature-programmed reduction showed that palladium promoted both the reduction and reoxidation of the support.The activity of the support was compared with that of fully formulated catalysts containing palladium.The Pd/Ce Zr Al Ox material exhibited long-term stability and selectivity to propene (during continuous operation for 140 h), which is not normally associated with dehydrogenation catalysts.A detailed electrochemistry model coupled with an optimization algorithm was developed to examine the effects of cycling rate and cathode solid particle size, species diffusivity, and electronic conductivity on the specific energy and specific power of battery.It was found from simulation results that the available energy decreased with a faster cycling rate, larger active material particle size, and lower species diffusivity. found from experiments and simulations that minor solid-phase diffusion limitation effects existed in the carbon electrode and solution-phase diffusion limitations might become notably significant for a cell with an increased electrode thickness or a decreased initial salt concentration (decreased down to 1 mol•L found from numerical simulations that end of high-rate discharges might be caused by near-depletion of lithium species at negative electrode solid active material surfaces, full saturation of lithium at positive electrode solid active material surfaces, or local Li-ion depletion in the electrolyte. investigated the cell performance and the mechanisms limiting cell performance during fast-charge operations at moderate and extreme operation temperatures by an electrochemical-thermal coupling model.