Electrospun poly(vinylidene‐fluoride)/POSS nanofiber membrane‐based polymer electrolytes for lithium ion batteries

Abstract

In this study, poly(vinylidene fluoride) (PVDF)/polyhedral oligomeric silsesquioxanes (POSS) nanofibrous membranes are prepared through electrospun process. Field emission scanning electron microscope images clearly show that PVDF/POSS membranes have interconnected multi fibrous layers with ultrafine porous structures. The average fiber diameter and crystallinity of PVDF/POSS membranes are lesser than that of pure PVDF membrane. Thermal stability and electrolyte uptake of blend membranes increase with increasing POSS content. Finally, PVDF/POSS membranes are soaked in a liquid electrolyte to form the polymer electrolytes and are assembled in coin cells to test their electrochemical properties such as ionic conductivity, interfacial characteristics, and electrochemical stability windows. The ionic conductivity improves with increasing POSS content and the highest ionic conductivity reaches 2.91 × 10−3 S/cm at room temperature. It is also worth mention that the composite polymer electrolytes show low interfacial resistance and high electrochemical stability window of 5.6 V (vs. Li+ /Li) with storage time. POLYM. COMPOS., 38:629–636, 2017. © 2015 Society of Plastics Engineers

Organosilicon‐Based Functional Electrolytes for High‐Performance Lithium Batteries

“…[96][97][98][99] POSS is a cage-like organic-inorganic hybrid material (formula R 8 Si 8 O 12 ) with SiOSi as the internal inorganic framework and the substituted organic groups at eight vertices (Figure 2). POSS has attracted great attention due to its special nanostructure and easy modification, showing great potentials in separators, [100][101][102] liquid, [103,104] and solid state electrolytes [105] for batteries. Separators and electrolytes involving POSS and functionalized POSS are usually endowed with better thermal stability and higher safety.…”

Mechanical and thermal properties of microchannel insulating foams comprising a multifunctional epoxy/polyhedral oligomeric silsesquioxane nanocomposite

“…7 These strategies commonly employ silica-based additives, with increasingly smaller particulates showing improved environmental durability, thermal stability, and/or mechanical properties of the resin system due to the increase in specific surface area of the well-dispersed nano-additives. [5][6][7][8][9][10] In particular, hybridized inorganic-organic silica-polymer nanomaterials based on polyhedral oligomeric silsesquioxane (POSS) have shown excellent potential not only in improving mechanical properties [10][11][12][13][14][15][16][17] and thermal stability 10,11,[14][15][16][18][19][20][21][22][23] but also for enhanced dielectric performance, 15,16,[24][25][26][27][28] flammability resistance, [29][30][31] catalysis, 32 electrolytic capabilities, [33][34][35] thermal and electrical conductivities, 26,28,36 abrasion resistance, 10,16 shap...…”

“…These strategies commonly employ silica‐based additives, with increasingly smaller particulates showing improved environmental durability, thermal stability, and/or mechanical properties of the resin system due to the increase in specific surface area of the well‐dispersed nano‐additives 5–10 . In particular, hybridized inorganic‐organic silica‐polymer nanomaterials based on polyhedral oligomeric silsesquioxane (POSS) have shown excellent potential not only in improving mechanical properties 10–17 and thermal stability 10,11,14–16,18–23 but also for enhanced dielectric performance, 15,16,24–28 flammability resistance, 29–31 catalysis, 32 electrolytic capabilities, 33–35 thermal and electrical conductivities, 26,28,36 abrasion resistance, 10,16 shape memory polymer behavior, 37 liquid crystals and sensors, 22,38 and froth flotation surfactants, 39 among others. These POSS structures are comprised of a cage‐like lattice of alternating silicon and oxygen atoms (Figure 1A) with tailorable functional groups incorporated at the lattice corners to improve resin compatibility for physical mixing and/or chemical reactivity with the bulk polymer matrix.…”

Silsesquioxane‐Containing Hybrid Nanomaterials: Fascinating Platforms for Advanced Applications

“…SSQ nanoparticles, when well dispersed in GPEs, can improve their ionic conductivity, electrochemical stability, and mechanical strength. POSS increases both the ionic conductivity and lithium transference number of the electrolytes significantly . Ma et al.…”

“…POSS increases both the ionic conductivity and lithium transference number of the electrolytes significantly. [126] Ma et al synthesized POSS-poly(methyl methacrylate)(PMMA) particles and used them to modify electrospun polyvinylidene fluoride (PVDF). The resulting hybrid nanocomposites were applied as GPEs for lithium-ion batteries.…”