Counter-ion and humidity effects on electromechanical properties of Nafion®/Pt composites

Saccardo, Matheus Colovati; Zuquello, Ariel Gustavo; Tozzi, Kaique Afonso; Gonçalves, Roger; Hirano, Laos Alexandre; Scuracchio, Carlos Henrique

doi:10.1016/j.matchemphys.2020.122674

Cited by 22 publications

(27 citation statements)

References 55 publications

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“…As is shown in Figure 4f, the maximum force of M-IPMC actuator is far larger than that of the IPMC actuator. Also, the maximum blocking force of the M-IPMC actuator is higher than that of the reported actuator (0.64 mN, 1.6 mN and 4.2 mN) as is shown in Table 1 [4][5][6]. Since the peak blocking force of M-IPMC is decayed as voltages decreased, the blocking force of actuators can be controlled under certain low voltages (5.8-6.0 V).…”

Section: Resultsmentioning

confidence: 80%

“…Under the electric field, the blocking force and displacement are attributed to the migration of cations (normally Li + ) in the channels of the ion-change membrane. The electrochemical performance of IPMC is depending on various actors, such as the size of metal particles [3], types of polymer [4], and the surface structure of the polymer [5]. Based on above actuation mechanism, the structure of the polymer may play an important role in enhancing the electrochemical performance of IPMC because it can greatly affect the transmission of cations.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Macroporous Nafion Membrane from Silica Crystal for Ionic Polymer-Metal Composite Actuator

Zhang

Wang

et al. 2020

Processes

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Nafion membrane with macropores is synthesized from silica crystal and composited with Pt nanoparticles to fabricate macroporous ionic polymer-metal composite (M-IPMC) actuator. M-IPMC shows highly dispersed small Pt nanoparticles on the porous walls of Nafion membrane. After the electromechanical performance test, M-IPMC actuator demonstrates a maximum displacement output of 19.8 mm and a maximum blocking force of 8.1 mN, far better than that of IPMC actuator without macroporous structure (9.6 mm and 2.8 mN) at low voltages (5.8–7.0 V). The good electromechanical performance can be attributed to interconnected macropores that can improve the charge transport during the actuation process and can allow the Pt nanoparticles to firmly adsorb, leading to a good electromechanical property.

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Section: Resultsmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Fabrication of Macroporous Nafion Membrane from Silica Crystal for Ionic Polymer-Metal Composite Actuator

Zhang

Wang

et al. 2020

Processes

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“…In the elastomeric field, conductive rubber composites (CRC) are gaining importance by combining the above‐mentioned characteristics with their unique strain properties 1,2 . The rubbers' high flexibility allows, for example, the replacement of metallic electrodes in devices that are subjected to repeated actuation cycles, such as in ionomeric polymer–metal composites (IPMCs), 3,4 whose conventional electrodes degrades over time 5–7 . Other applications include biomimicry, 8 capacitors, 9 electrochemical sensors, 10 biomedicine, 11 and flexible electronics 12 …”

Section: Introductionmentioning

confidence: 99%

Improving the swelling, mechanical, and electrical properties in natural rubber latex/carbon nanotubes nanocomposites: Effect of the sonication method

Barbosa

Gonçalves

Tozzi

et al. 2022

J of Applied Polymer Sci

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Conductive polymeric composites are exciting for future electronic applications given the possibility to ally electrical conductivity and flexibility. However, the high viscosity of plasticized elastomers difficult the dispersion of conductive fillers in an elastomeric matrix is difficult. This research aimed to compare the use of bath or probe sonication to disperse multi-walled carbon nanotubes (MWCNT) in the lower-viscosity natural rubber latex. The MWCNT concentration varied from 0.5 to 2.5 wt%, and the coagulated compounds were vulcanized after compounding in a two-roll mill. Nanocomposite's swelling behavior was determined by Flory-Rehner crosslink density and Kraus theory, indicating better dispersion in probe sonication, which also was conducted in lesser time and applied lower energy than bath sonication. This result is evidenced through tensile strength and hardness tests, as the better MWCNT dispersion improved the reinforcement due to greater filler-matrix interaction. The electrical response was obtained by impedance spectroscopy, with higher conductivities also found in tip-sonicated samples.In addition, cyclic strain fatigue test was realized from 20% to 100% strain during 20,000 cycles with simultaneous impedance measurement, reinforcing the better distribution of MWCNT in the probe-sonicated nanocomposites with higher tensile stress (Payne's effect) and conductivity retention than bath sonicated.

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“…Fujimura et al [ 18 ] studied the influence of surface wettability on hydrogen evolution reaction (HER) activity and efficiency. Saccardo et al [ 19 ] used different cations to adhere to a Nafion117-MEA membrane material surface; the experiment proved that the humidity could influence the performance of the membrane electrode assembly (MEA) membrane material. Möckl et al [ 20 ] built an internal heat transfer model of a polymer electrolyte membrane water electrolyzer (PEMWE), and performed experiments on heat transfer and flow control.…”

Section: Introductionmentioning

confidence: 99%

PEMWE with Internal Real-Time Microscopic Monitoring Function

Lee

Chen²,

Jung

et al. 2021

Membranes

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In recent years, various countries have been paying attention to environmental protection issues, believing that climate change is the main challenge to the developed countries’ energy policies. The most discussed solution is renewable energy. The energy storage system can reduce the burden of the overall power system of renewable energy. The hydrogen energy is one of the optimal energy storage system options of renewable energy at present. According to these policies and the future trend, this study used micro-electro-mechanical systems (MEMS) technology to integrate micro voltage, current, temperature, humidity, flow and pressure sensors on a 50 μm thick polyimide (PI) substrate. After the optimization design and process optimization, the flexible six-in-one microsensor was embedded in the proton exchange membrane water electrolyzer (PEMWE) for internal real-time microscopic monitoring.

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Counter-ion and humidity effects on electromechanical properties of Nafion®/Pt composites

Cited by 22 publications

References 55 publications

Fabrication of Macroporous Nafion Membrane from Silica Crystal for Ionic Polymer-Metal Composite Actuator

Fabrication of Macroporous Nafion Membrane from Silica Crystal for Ionic Polymer-Metal Composite Actuator

Improving the swelling, mechanical, and electrical properties in natural rubber latex/carbon nanotubes nanocomposites: Effect of the sonication method

PEMWE with Internal Real-Time Microscopic Monitoring Function

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