Study on cellulose nanofibers/aramid fibers lithium-ion battery separators by the heterogeneous preparation method

Polydopamine‐assisted in situ formation of dense aramid nanofibers layer on polyethylene separator for lithium‐ion battery

“…As presented in Figure 3c, the tensile strength of PE, PE/PDA‐5, PE/PDA‐5/ANFs‐1, PE/PDA‐5/ANFs‐2, PE/PDA‐5/ANFs‐PDA‐3 is 175.75 ± 6.14, 179.02 ± 14.22, 177.62 ± 2.21, 184.69 ± 14.72, 180.12 ± 18.95 MPa. Therefore, the added ANFs can have the positive effect to enhance the mechanical performance of the PE/PDA‐5 separator mainly due to the hydrogen bonding among PE, PDA, and aramid fibers to achieve the bridging and enhance interface compatibility, as well as the ANFs itself owned the high strength 41 . However, the high concentration of ANFs caused the decrease in mechanical properties of PE/PDA‐5 separator which mainly attributed to the increase of the thickness for the effective load transfer from the PE matrix to the ANFs 35 (Figure 3d).…”

“…Therefore, the added ANFs can have the positive effect to enhance the mechanical performance of the PE/PDA-5 separator mainly due to the hydrogen bonding among PE, PDA, and aramid fibers to achieve the bridging and enhance interface compatibility, as well as the ANFs itself owned the high strength. 41 However, the high concentration of ANFs caused the decrease in mechanical properties of PE/PDA-5 separator which mainly attributed to the increase of the thickness for the effective load transfer from the PE matrix to the ANFs 35 (Figure 3d). Therefore, we chose the PE/PDA-5/ANFs-2 separator for the following study.…”

Recent Development in Novel Lithium-Sulfur Nanofiber Separators: A Review of the Latest Fabrication and Performance Optimizations

“…Aromatic polyamides, frequently called aramids, are often electrospun from Kevlar into nanofibers that boast excellent mechanical and thermal stability [ 68 ]. Many aramid NF (ANF) separators have been designed as alternatives to polyolefin separators in Li-ion batteries [ 20 , 69 , 70 , 71 , 72 ] and only recently in LSBs [ 58 ]. Liu et al [ 73 ] electrospun a poly(m-phenylene isophthalamide) (PMIA) solution to yield a 3D network of 90 nm fibers.…”

Overlooked Promising Green Features of Electrospun Cellulose-Based Fibers in Lithium-Ion Batteries

“…Moreover, the alkaline hydrolysis step caused the generation of more hydroxyl groups on the surface of the nanofibrous layer, causing the interaction with PF 6 − and so limited its movements and increased the ionic conductivity (see Figure 7c). Evaluation of cellulose/aramid, 128,129 bacterial cellulose/SiO 2 , 130 and deacetylated cellulose acetate/PVDF 131 nanofibrous separators have also been conducted in this year using other techniques rather than the electrospinning procedure. 1.694 mS.cm −1 the proposed structure showed a higher porosity rate compared with the pristine PAN, due to the fabrication of finer fibers; also, higher porosity and great wettability of the boehmite and CA caused superior electrolyte uptake, as well as greater ionic conduction.…”

“…Moreover, the alkaline hydrolysis step caused the generation of more hydroxyl groups on the surface of the nanofibrous layer, causing the interaction with PF 6 – and so limited its movements and increased the ionic conductivity (see Figure c). Evaluation of cellulose/aramid, , bacterial cellulose/SiO 2 , and deacetylated cellulose acetate/PVDF nanofibrous separators have also been conducted in this year using other techniques rather than the electrospinning procedure. Table summarizes other advancements carried out toward engineering versatile cellulose-based separators.…”