Performance enhancement induced by electrospinning of polymer electrolytes based on poly(methyl methacrylate-co-2-acrylamido-2-methylpropanesulfonic acid lithium)

Abstract

A series of novel fibrous polymer electrolytes with high ionic conductivity based on electrospun poly (methyl methacrylate-co-2-acrylamido-2-methylpropanesulfonic acid lithium) (P(MMA-co-AMPSLi)) membranes were prepared and characterized. P(MMA-co-AMPSLi) was synthesized by free radical copolymerization of MMA and AMPS, followed by ion exchange of the H ? with Li ? . The fibrous polymer electrolytes were fabricated by immersing the electrospun P(MMA-co-AMPSLi) membranes into the liquid electrolyte. Fourier transform infrared spectroscopy and 1 H-nuclear magnetic resonance were used to characterize the structure of the copolymers. Thermogravimetric analysis was applied to investigate the thermal properties of the copolymers. Scanning electromicroscope was employed to observe the morphology of electrospun membranes before and after soaking the liquid electrolyte. AC impedance and linear sweep voltammetry were adopted to measure the electrochemical properties of the fibrous polymer electrolytes. The incorporation of the AMPSLi units effectively improved the electrospinnability of the copolymer, increased the dielectric constants of the electrospun membranes, and enhanced the dimensional stability by maintaining the pore structures even after the membranes absorbing large amounts of liquid electrolytes. As a result, the ionic conductivity of the polymer electrolytes increased with the increase in the molar ratio of AMPSLi units, and the highest ion conductivity was up to 4.12 9 10 -3 S cm -1 at room temperature. Meanwhile, the polymer electrolytes studied in this work exhibited a sufficient electrochemical stability (up to 5.0 V) that allows the safe operation in lithium-ion batteries.

A promising electrochemical sensing platform based on a silver nanoparticles decorated copolymer for sensitive nitrite determination

“…The resonance peaks at 1.44 and 1.76 ppm are attributed to side chain methyl and main chain methylene protons of PAMPS, respectively. 28 A broad peak present at 3.2-3.5 ppm is attributed to methylene protons closest to the sulfonic acid group and the broad peak at 7.4-7.6 ppm is attributed to the amide (-NH-) of PAMPS. 28 The results prove that PAMPS and PMMA are found in the product.…”

“…28 A broad peak present at 3.2-3.5 ppm is attributed to methylene protons closest to the sulfonic acid group and the broad peak at 7.4-7.6 ppm is attributed to the amide (-NH-) of PAMPS. 28 The results prove that PAMPS and PMMA are found in the product. The absence of ethylenic proton peaks proves the copolymerization and total exclusion of monomers from the copolymer.…”

Enhancement of the electrochemical performance of lithium-ion batteries by SiO2@poly(2-acrylamido-2-methylpropanesulfonic acid) nanosphere addition into a polypropylene membrane

“…For liquid electrolyte batteries, the membrane can quickly and effectively absorb electrolyte, which is conducive to the improvement of the electrochemical performance. 37,38 To quantitatively evaluate the electrolyte wetting of the membranes, the CAs of the electrolyte on the separator were measured (Fig. 3).…”

Heavy metal sensors and sequestrating agents based on polyaromatic copolymers and hydrogels

“…1(A)), the appearance of resonances between ⊐ 8.1 and 8.6 ppm signifies the presence of the aromatic protons of the pyrene moiety, where the broadened appearance of these resonances when in a polymer matrix has been noted elsewhere. 43,[53][54][55][56] In addition to the aromatic hydrogens this spectrum also possessed a broadened singlet (at ⊐ 5.2 ppm), assigned to H b , which is also derived from the incorporation of PyMA. The resonance at ⊐ 7.7 ppm is assigned to the amide N-H (H-NCO) which is derived from AMPS, as is the resonance at ⊐ 2.9 ppm.…”