Evaluation of structural aspects and operation environments on the performance of passive micro direct methanol fuel cell

Wang, Luwen; Yin, Lu; Yang, Weidong; Cheng, Yuhua; Wen, Fei; Liu, Chaoran; Dong, Linxi; Wang, Minghao

doi:10.1016/j.ijhydene.2020.10.114

Cited by 18 publications

(6 citation statements)

References 31 publications

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“…All of these conditions (environmental temperature and atmospheric pressure, as well as cell orientation and environmental conditions) can be considered external to the system, as explained in a recent comprehensive study reported by Wang et al [116], who investigated their effect on the performance of a PS-DMFC. In contrast, they considered internal/structural factors to include the hot press parameters of the MEA (temperature, pressure, and time), flow channel patterns (horizontal stripe pattern (HSP), vertical strip pattern (VSP), and circle pattern (CP)), and CC open ratios (35.8%, 45.6%, and 52%).…”

Section: Acidic Dmfcsmentioning

confidence: 99%

Passive Small Direct Alcohol Fuel Cells for Low-Power Portable Applications: Assessment Based on Innovative Increments since 2018

2022

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Passive small direct alcohol fuel cells (PS-DAFCs) are compact, standalone devices capable of electrochemically converting the chemical energy in the fuel/alcohol into electricity, with low pollutant emissions and high energy density. Thus, PS-DAFCs are extremely attractive as sustainable/green off-grid low-power sources (milliwatts to watts), considered as alternatives to batteries for small/portable electric and electronic devices. PS-DAFCs benefit from long life operation and low cost, assuring an efficient and stable supply of inherent non-polluting electricity. This review aims to assess innovations on PS-DAFC technology, as well as discuss the challenges and R&D needs covered on practical examples reported in the scientific literature, since 2018. Hence, this compilation intends to be a guidance tool to researchers, in order to help PS-DAFCs overcome the barriers to a broad market introduction and consequently become prime renewable energy converters and autonomous micropower generators. Only by translating research discoveries into the scale-up and commercialization process of the technology can the best balance between the economic and technical issues such as efficiency, reliability, and durability be achieved. In turn, this will certainly play a crucial role in determining how PS-DAFCs can meet pressing sustainable energy needs.

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Section: Acidic Dmfcsmentioning

confidence: 99%

Passive Small Direct Alcohol Fuel Cells for Low-Power Portable Applications: Assessment Based on Innovative Increments since 2018

2022

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“…A Micro Direct Methanol Fuel Cell (μDMFC), as a novel clean energy source, has compelling prospects for application in portable electronics energy due to its high energy density, easy storage and abundant sources of fuel, easy start-up, and eco-friendly. 1–5 A conventional μDMFC mainly consists of the current collector, diffusion layer, microporous layer, catalytic layer, and proton exchange membrane, among which the diffusion layer and current collector play essential roles in the electron and mass transport of the cell. 6–9 When using a conventional perforated stainless steel current collector to provide encapsulation pressure, there is a large contact impedance and uneven pressure distribution between the diffusion layer and the current collector, as well as a large mass transfer dead zone, which leads to μDMFC performance degradation.…”

Section: Introductionmentioning

confidence: 99%

Cathode diffusion layer and current collector with slotted foam stainless steel for a micro direct methanol fuel cell

Zhao

Wang

et al. 2022

RSC Adv.

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“…The results showed that the passive DMFC with a combination of perforated collector plates under an opening ratio of 55.40% and stainless-steel mesh collector plates under an opening ratio of 38.70% achieves the best performance by producing peak power density at a methanol concentration of 5 mol/L. Wang et al [22] investigated the effects of current collector channel patterns and a current collector open ratio on the performance of µDMFC through experiments. The experimental results showed that the µDMFC with an open ratio of 45.6% or 35.8% has optimal performance under natural convection conditions.…”

Section: Introductionmentioning

confidence: 99%

Performance Optimization of μDMFC with Foamed Stainless Steel Cathode Current Collector

Zhao

Zhang

et al. 2021

Energies

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The micro direct methanol fuel cell (μDMFC) has attracted more and more attention in the field of new energy due to its simple structure, easy operation, and eco-friendly byproducts. In a μDMFC’s structure, the current collector plays an essential role in collecting the conduction current, and the rational distribution of gas and water. The choice of its material and flow fields would significantly impact the μDMFC’s performance. To this end, four different types of cathode current collector were prepared in this study. The materials selected were stainless steel (SS) and foam stainless steel (FSS), with the flow fields of hole-type and grid-type. The performance of the μDMFC with different types of cathode current collector was investigated by using polarization curves, electrochemical impedance spectroscopy (EIS), and discharging. The experimental results show that the maximum power density of μDMFC of the hole-type FSS cathode current collector is 49.53 mW/cm2 at 70 °C in the methanol solution of 1 mol/L, which is 115.72% higher than that of the SS collector. The maximum power density of the μDMFC with the grid-type FSS collector is 22.60 mW/cm2, which is 27.39% higher than that of the SS collector. The total impedance of the μDMFC of the FSS collector is significantly lower than that of the μDMFC of the SS collector, and the total impedance of the μDMFC with the hole-type flow field collector is lower than that of the grid-type flow field. The discharging of μDMFC with the hole-type FSS collector reaches its optimal value at 70 °C in the methanol solution of 1 mol/L.

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Evaluation of structural aspects and operation environments on the performance of passive micro direct methanol fuel cell

Cited by 18 publications

References 31 publications

Passive Small Direct Alcohol Fuel Cells for Low-Power Portable Applications: Assessment Based on Innovative Increments since 2018

Passive Small Direct Alcohol Fuel Cells for Low-Power Portable Applications: Assessment Based on Innovative Increments since 2018

Cathode diffusion layer and current collector with slotted foam stainless steel for a micro direct methanol fuel cell

Performance Optimization of μDMFC with Foamed Stainless Steel Cathode Current Collector

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