Ion-selective aramid nanofiber-based Janus separators fabricated by a dry-wet phase inversion approach for lithium–sulfur batteries

Abstract

The rapid development of modern portable electronics and electric vehicles toward safety and high reliability puts forward stringent requirements for fast ion conduction, high thermal/mechanical reliability, and easy processing and...

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.…”

“…Moreover, the LSB with the aramid NF separator exhibited a 38% higher initial capacity than with a standard PP separator. Moreover, aramid NFs can be fabricated as sol-gel-type separators [ 58 ]. For example, Pei et al [ 58 ] fabricated a Janus-type separator with a highly porous side facing the Li anode and a dense nanofiltering side facing the sulfur cathode.…”

“…Moreover, aramid NFs can be fabricated as sol-gel-type separators [ 58 ]. For example, Pei et al [ 58 ] fabricated a Janus-type separator with a highly porous side facing the Li anode and a dense nanofiltering side facing the sulfur cathode. Creating a sol-gel film of ANFs was critical because the dense film was synthesized via a dry-wet phase inversion process.…”

Designing polysulfides adsorption‐conversion on g‐C3N4‐based separator via doping heteroatoms boron and phosphorus toward high‐performance lithium‐sulfur batteries

“…[6][7][8][9][10] Addressing the "shuttle effect" has been the focus of significant research efforts. [11][12][13][14][15][16] Incorporating sulfur into the polar cathode host, such as doped carbon materials, [17][18][19] metal oxides, [20][21][22][23][24][25][26] metal sulfides, [27][28][29][30][31][32][33] conductive polymers, [34][35][36][37] and metal-organic frameworks (MOFs) 26,[38][39][40][41][42] to facilitate the storage and conversion of LiPSs is efficient in restraining the shuttling action. However, the introduction of multitudinous inactive substances impairs the integral energy density.…”

Nanocomposite Janus Gel Polymer Electrolytes for Lithium Metal Batteries

“…On the beyond-lithium batteries side, a great deal of work was devoted to the improvement of lithium-sulfur cells by developing JMs with the double aim to stabilize the lithium metal interface and (most importantly) to block/reduce the polysulfide shuttle [9][10][11][12][13][14][15][16][17][18][19]. Zhou et al developed JMs containing a single sodium ion-conducting side and a functional low-dimensional material (MXene)-coated side.…”