Electrodeposited conductive polypyrrole/polyaniline composite film for the corrosion protection of copper bipolar plates in proton exchange membrane fuel cells

Pan, T.J.; Zuo, Xiahua; Wang, T.; Hu, Jing; Chen, Zhidong; Ren, Yibin

doi:10.1016/j.jpowsour.2015.10.027

Cited by 101 publications

(29 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Though the introduction of P3HT, PANI and g-PAN is effective to improve the photocatalytic performance, it is expensive and difficult to obtain through organic synthesis which inhibits their practical application [26,27]. Polypyrrole (PPy) is an organic semiconductor with band-gap of 2.2-2.5 eV, good environmental stability, high conductivity and interesting redox properties [28][29][30][31]. Moreover, PPy is cheaper and easier to be synthesized than that of P3HT, PANI and g-PAN and even possesses strong electron transmitting ability interesting redox properties [32].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of conductive and high-dispersed Ppy@Ag/g-C3N4 composite photocatalysts for removing various pollutants in water

Zhu

et al. 2016

Applied Surface Science

115

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Fabrication of conductive and high-dispersed Ppy@Ag/g-C3N4 composite photocatalysts for removing various pollutants in water

Zhu

et al. 2016

Applied Surface Science

115

View full text Add to dashboard Cite

“…R s /R ct and C show the resistance and capacitive reactance, respectively [8]. Besides, the nonideal resistive and capacitive behavior of the samples are described by the constant phase elements (CPE) , which is described by the formula [35,41]:…”

Section: Electrochemical Testmentioning

confidence: 99%

Microstructure and corrosion behaviors of AZ31 alloy with an amorphous-crystallin nano-composite film

Liu

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

Magnesium (Mg) alloy has drawn considerable attention for lightweight structural and functional materials, whereas its corrosion resistance still requires to be enhanced. A new strategy for corrosion resistance has been proposed as making an amorphous-crystalline nano-composite film on Mg alloys. The film as the composition as Al 2 O 3 /GaN with a thickness of 20 nm was prepared on AZ31 Mg alloy by atomic layer deposition. Grazing incidence x-ray diffraction, scanning electron microscopy equipped with energy-dispersive spectroscopy, transmission electron microscopy, x-ray photoelectron spectroscopy, and nano indentation tester have been used to characterize the film in details. It is verified the sample has an amorphous/crystalline/Mg interface structure, and a surface with homogeneous elemental distribution and higher hardness. Neutral salt spray test shows the film changes the corroded mode from pitting corrosion to uniform corrosion. Furthermore, electrochemical measurements indicate that the film would raise E corr (ΔE corr =+0.295 V), drop i corr (about 1/10 times), and make electrical equivalent circuits change from R s (CPE R ct (R L L)) to R s (CR f ) (CPE R ct (R L L)). All evaluations show that better corrosion resistance has been by inducing the amorphouscrystalline nano film. The amorphous layer in the film would make a more homogeneous Cl − distribution in the surface and act as a barrier to block the penetration of corrosion medium in the early stage. During corrosion, the interface between the layers in the film could retard the corrosion crack propagating further. The film would be favorate to form a denser corrosion product layer finally. A more uniform and lower corrosion occurs for AZ31 Mg alloy with this nano-composite film.

show abstract

“…PANI/PPY composite was also electrodeposited for the corrosion protection of copper bipolar plates in proton exchange membrane fuel cells. It presented better protection than homopolymer coating which is ascribed to its tailored structure . This kind of film was also used as a temperature sensor, as described by Karakişla and Saçak.…”

Section: Introductionmentioning

confidence: 99%

PANI/PPY blend thin films electrodeposited for use in EGFET sensors

Mello

Mulato

2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

Galvanostatic electrodeposited thin films of polyaniline (PANI)/polypyrrole (PPY) blend were tested as chemical sensors and evaluated according to the relative monomer concentration in polymerization solution aiming to obtain a reliable reference field‐effect transistor able to be used as contrast sensing film. The blend material presented properties that can be controlled by the polymerization process. The films were produced using aniline (0.25 M) and pyrrole (0.25 M) mixed in five different proportions (90/10, 70/30, 50/50, 30/70, 10/90) with HCl (1.0 M) in an aqueous solution. The current density was 1 mA/cm2 for 300 s. The films were analyzed by their chronopotentiometric curves, thickness, reflectance spectroscopy, optical color parameters, and surface morphology. The characteristics and properties analyzed were correlated to the relative monomer concentration in the polymerization solution. The polymerization of PANI is favorable in aqueous acid solution compared to PPY, which resulted in thin films with properties varying from PANI down to PPY. The blend films presented controllable sensitivity when applied as sensing stage in field‐effect transistor devices as function of the relative monomer concentration. The sensitivity varied from 57 ± 1 mV/pH for the PANI sample, down to 25 ± 1 mV/pH for the PPY sample, presenting an exponential behavior. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46625.

show abstract

Electrodeposited conductive polypyrrole/polyaniline composite film for the corrosion protection of copper bipolar plates in proton exchange membrane fuel cells

Cited by 101 publications

References 50 publications

Fabrication of conductive and high-dispersed Ppy@Ag/g-C3N4 composite photocatalysts for removing various pollutants in water

Fabrication of conductive and high-dispersed Ppy@Ag/g-C3N4 composite photocatalysts for removing various pollutants in water

Microstructure and corrosion behaviors of AZ31 alloy with an amorphous-crystallin nano-composite film

PANI/PPY blend thin films electrodeposited for use in EGFET sensors

Contact Info

Product

Resources

About