Nanostructured reactive alumina particles coated with water-soluble binder on the polyethylene separator for highly safe lithium-ion batteries

Cathode Electrolyte Interphase-Forming Additive for Improving Cycling Performance and Thermal Stability of Ni-Rich LiNixCoyMn1–x–yO2 Cathode Materials

“…Figure d,e presents the EIS results of lithium-ion cells without and with 0.5 wt % TMAEPPi during cycling, showing two overlapping semicircles. As given in the equivalent circuit (Figure S9), the semicircle in the high-frequency region corresponds to the ion transport in the surface film ( R f ) formed at the electrode surface, and the semicircle in the mid- to low-frequency region is related to the charge transfer reaction ( R ct ) at the interface between the electrolyte and electrode . The obtained EIS data were fitted by the equivalent circuit, and the fitting results are given in Table S1.…”

“…As given in the equivalent circuit (Figure S9), the semicircle in the high-frequency region corresponds to the ion transport in the surface film (R f ) formed at the electrode surface, and the semicircle in the midto low-frequency region is related to the charge transfer reaction (R ct ) at the interface between the electrolyte and electrode. 37 The obtained EIS data were fitted by the equivalent circuit, and the fitting results are given in Table S1. After the first cycle, the total interfacial resistances (R f + R ct ) are similar, irrespective of the presence of TMAEPPi, and then gradually increase with cycling in both cells.…”

Porous Sodium Alginate/Boehmite Coating Layer Constructed on PP Nonwoven Substrate as a Battery Separator through Polydopamine‐Induced Water‐Based Coating Method

“…This has a close relationship with adhesive SA and nanoparticles γ-AlOOH in coating layer, which can render higher surface energy and superior hydrophilicity to grab electrolyte or water. [26] Especially, when droplets were cast on PCS separator, the minimum contact angels (~51.6 °and ~34.4 °) appeared. As mentioned above, the addition of NMP can play a role of making hole, which will assist separator to form better connected pore structures, thus being advantageous to the diffusion of droplets in separator.…”

Poly(ether ether ketone) Conferred Polyolefin Separators with High Dimensional Thermal Stability for Lithium-Ion Batteries

“…To address these issues, researchers have attempted to modify polyolefin membranes to ameliorate the properties of battery separators . Inorganic particles have been applied to the surfaces of PP and PE microporous membranes using polymers as binders. − The oxide particles (e.g., Al 2 O 3 , SiO 2 , TiO 2 ) provide the resulting composite separators with improved thermal stability and electrolyte wettability. However, the solid ceramic particles block the transport pathways of the electrolyte and generally result in ionic conductivity below 1 mS cm –1 .…”