Development of plasma-treated polypropylene nonwoven-based composites for high-performance lithium-ion battery separators

Surface-modified polyethylene separator via oxygen plasma treatment for lithium ion battery

“…Therefore, the development of polyolefin separators 34 with good wettability is one of the most urgent challenges for high 35 performance LIBs. To overcome these drawbacks, various methods 36 including inorganic particle coating [7][8][9][10][11][12], polymer coating [13], 37 physical/chemical vapor deposition [14], and grafting hydrophilic 38 polymer [15][16][17][18] have been employed to improve the wettability 39 of the polyolefin separators. Even though the modification of 40 hydrophobic polyolefin separators with suitable hydrophilic 41 monomers to impart enough hydrophilicity to readily absorb 42 the electrolyte solution is one of the best methods, they still have 43 the drawbacks such as complex multi-steps and relatively high 44 expense.…”

“…Secondary batteries 12 include many kinds of batteries, such as a nickel-cadmium battery, 13 nickel-metal hybrid battery, lithium ion batteries (LIBs), redox 14 flow battery, lithium/sodium sulfur batteries (Li-S/Na-S), and so 15 on, among which LIBs are the most popular rechargeable batteries 16 for portable electronics such as mobile products, communication 17 devices, and electronic equipment. Recently, the importance and 18 demands of LIBs has been remarkably increased, because LIBs have 19 high energy density, excellent cycle life, and relatively low self-20 discharge property [1,2]. 21…”

“…The LE wettability of the separator plays an important role in 239 battery performance since the separator with good wettability can 240 readily absorb the LE and enable ion transport between electrodes 241 [18]. The performance of separator is also determined by the 242 surface morphology and pore structure of the membrane [3].…”

Preparation and electrochemical performance of ZrO2 nanoparticle-embedded nonwoven composite separator for lithium-ion batteries

“…This improved C-rate performance of ZNW separator is ascribed to the higher ionic conductivity in the cell which originates from the well developed nanoporous structure and the higher electrolyte uptake. increases, which may be due to little change in internal impedance [27,28]. However, ZNW separator shows more stable discharge capacity up to 200 cycles, which appears to be slightly higher than that of PE separator.…”

Plasma Surface Treatments of Nonwovens

“…Li et al [37] fabricated a high-performance battery separator where they used polypropylene nonwoven as the support material. A fluorinated polymer, octafluoropentyl methacrylate, was grafted onto the surface of the polypropylene nonwoven by plasma treatment to improve the nonwoven's adhesion with poly(vinylidene fluoride-co-hexafluoropropylene).…”