Morphology and Conductivity Evaluation of Electrospun Polyacrylic Acid (PAA) Microfiber

Ismail, I.; Bakar, Noor Fitrah Abu; Ling, Tong; Ideris, Norhidayah; Zain, Z. H.M.; Radacsi, Norbert

doi:10.1016/j.matpr.2019.06.337

Cited by 21 publications

(14 citation statements)

References 27 publications

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“…With the experimentally obtained 3-D resistivity volumes and known electronic resistivity values for electrode components, C-rich and Si-rich phases can be extracted from volumes via thresholding. Moreover, close analysis of the resistivity histogram data has identified additional peaks at ∼5 × 10 6 Ω·cm in both samples, a resistivity just beneath the experimentally measured range of PAA . This electronic resistivity assignment, examined together with the structural occurrence of this composition, lends to its identification as LiPAA binder.…”

mentioning

confidence: 57%

“…LiPAA has been identified as a binder with high ionic conductivity that promotes mechanical stability in composite anodes and cathodes . The electronic properties of LiPAA have not yet been extensively studied, but recent results by Ismail et al have measured electronic conductivity for poly(acrylic acid) (PAA) electrospun microfiber mats in the range of 10 –5 –10 –7 S m –1 (corresponding to 10 7 –10 9 Ω·cm) . While SSRM identification of LiPAA binder may be difficult in composite electrodes with low binder loading and well-distributed nanoparticle components, where binder occurs exclusively in separate domains, it can be identified when its electronic resistivity differs sufficiently from that of other electrode components.…”

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confidence: 99%

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Three-Dimensional Mapping of Resistivity and Microstructure of Composite Electrodes for Lithium-Ion Batteries

et al. 2020

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Nanoparticle silicon−graphite composite electrodes are a viable way to advance the cycle life and energy density of lithium-ion batteries. However, characterization of composite electrode architectures is complicated by the heterogeneous mixture of electrode components and nanoscale diameter of particles, which falls beneath the lateral and depth resolution of most laboratory-based instruments. In this work, we report an original laboratory-based scanning probe microscopy approach to investigate composite electrode microstructures with nanometerscale resolution via contrast in the electronic properties of electrode components. Applying this technique to silicon-based composite anodes demonstrates that graphite, SiO x nanoparticles, carbon black, and LiPAA binder are all readily distinguished by their intrinsic electronic properties, with measured electronic resistivity closely matching their known material properties. Resolution is demonstrated by identification of individual nanoparticles as small as ∼20 nm. This technique presents future utility in multiscale characterization to better understand particle dispersion, localized lithiation, and degradation processes in composite electrodes for lithium-ion batteries.

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confidence: 57%

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confidence: 99%

Three-Dimensional Mapping of Resistivity and Microstructure of Composite Electrodes for Lithium-Ion Batteries

et al. 2020

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“…These result reveals, the chemical backbone of the aromatic polymer, which has a compact structure that lowered the mobility of protons through the membrane. Whereas the perfluorinated Nafion 117 having a flexible chemical backbone, the transit of the proton becomes easier 59 …”

Section: Resultsmentioning

confidence: 99%

Proton conducting membrane based on multifunctional interconnected copolymer containing 4,4′‐diaminodiphenylmethane‐aminoethyl piperazine with sulfonated polyethersulfone membrane for fuel cell application

Karunanithi

Pegu

Balaguru

et al. 2021

J of Applied Polymer Sci

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The facile fabrication of proton exchange membrane (PEM) by intermixing of aminoethylpiperazine monomer (AEP), diamino diphenylmethane (DDM) monomer, and AEP combine with varying compositions of DDM (2, 4, and 6 wt%) copolymer with sulfonated polyethersulfone (SPES) and polyamide‐imide (PAI) polymer matrix for fuel cell applications. The intermixing of AEP@DDM copolymer in the SPES/PAI matrix was confirmed by Fourier transform infrared spectroscopy (FTIR) and X‐ray diffraction spectroscopy (XRD) techniques. The physicochemical performance of fabricated PEM was analyzed by water uptake, ion exchange capacity (IEC), swelling ratio, thermal degradation, hydrolytic degradation, chemical and mechanical properties. The intermixing copolymer (AEP@DDM) has significantly suppressed the thermal and hydrolytic deterioration of the PEM. Furthermore, the PAI had noteworthy to improve the thermal and chemical stability of the membranes significantly. The proton conductivity of the SPES/PAI/AEP@DDM (6%) membrane was found to be 5.68 × 10−4 S cm−1 which is 104% higher than the pristine SPES membrane. Besides, the selectivity of SPES/PAI/DDM (6%) was also enhanced up to 80.34% compared to pristine SPES membrane. The inclusion of AEP@DDM in SPES/PAI enhanced the proton conductivity and contributed to the membrane structure's uniformity, as revealed from morphological studies. The AEP@DDM copolymer modification of SPES/PAI membrane has shown good stability, physicochemical property and can be considered as a promising membrane material for fuel cell application.

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“…Finally, the solubility was the ratio of the soluble mass to the volume [6]. To measure the pH and the electrical conductivity of the samples, we measured the solubility pH and the conductivity of the filtra (saturated solution), respectively, by making use of a pH-meter (PREMIUM) and a conductivity meter [7,8]. The density was measured by filling a cylinder (test tube) with a determined volume, having a determined mass, and calculating the density as mass over volume [9].…”

Section: Methodsmentioning

confidence: 99%

The Rapid Identification of Solid Materials Using the ACP Method

Sadek

Touhtouh

Hajjaji

2022

The 2nd International Laayoune Forum on Biosaline Agriculture

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Morphology and Conductivity Evaluation of Electrospun Polyacrylic Acid (PAA) Microfiber

Cited by 21 publications

References 27 publications

Three-Dimensional Mapping of Resistivity and Microstructure of Composite Electrodes for Lithium-Ion Batteries

Three-Dimensional Mapping of Resistivity and Microstructure of Composite Electrodes for Lithium-Ion Batteries

Proton conducting membrane based on multifunctional interconnected copolymer containing 4,4′‐diaminodiphenylmethane‐aminoethyl piperazine with sulfonated polyethersulfone membrane for fuel cell application

The Rapid Identification of Solid Materials Using the ACP Method

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