Tailoring silk fibroin separator membranes pore size for improving performance of lithium ion batteries

Porous Composite Bifunctional Membranes for Lithium‐Ion Battery Separator and Photocatalytic Degradation Applications: Toward Multifunctionality for Circular Economy

“…The semicircle represents the overall resistance, resulting from the ohmic (contact film resistance), contact, and charge‐transfer reaction resistance, whereas the second semicircle is associated with the Li + diffusion process. [ 48 ] The overall resistance for each membrane is 157, 66.7, 58.6, and 81.7 Ω (0, 5, 10, and 20 wt% TiO 2 content) before GCD measurements and 400, 83.5, 78.0, and 83.2 Ω (0, 5, 10, and 20 wt% TiO 2 content, respectively) after GCD measurements. Comparing these results, it observed an increase in the resistance after cycling attributed to the formation of the solid electrolyte interphase (SEI) layer and simultaneous reduction of the lithium‐ion diffusion with increasing number of cycles.…”

Al Ions Doping Effect on The Diffusion Coefficient and Capacity of Li4Ti5O12 (Lithium Titanate, LTO) in Lithium-Ion Battery Anode

“…The separator is between the two electrodes and functions as a lithium ion transfer medium during the charging and discharging processes. The pore size of the separator provides sufficient space for electrolyte adsorption ensuring fast percolation of lithium ions through the separator while preventing short circuit and self-discharge [14] The Li + ion diffused from the cathode (lithium metal) to the anode (LTO/Al) at 1.5 V consequentially bringing the curve to a rise. When it reached the peak, the amount of Li ions diffusing into the anode caused the accumulation of Li + ions causing the curve to decrease because Li + could not encounter electrons from the Cu-foil.…”

Recent Advances on Materials for Lithium-Ion Batteries

“…A novel PVDF/triphenyl phosphate (TPP)/cellulose acetate (CA) separator membrane was fabricated by electrospinning, and this membrane shows high porosity, improved thermal stability, superior electrolyte wettability, improved flame resistance, excellent electrochemical properties, and cycle stability when compared to the commercial separators (Figure 8d) [237]. Silk fibroin membranes prepared by salt leaching are also an excellent candidate for this green transition, due to its high porosity and uptake, which leads to excellent battery performances at a wide range of discharge rates [203]. The experimental studies are frequently accompanied with theoretical and simulation models to better understand the involved physical-chemical phenomena [238].…”