Development of a novel pseudo bipolar piezoelectric proton exchange membrane fuel cell with nozzle and diffuser

Ma, Hwong‐Wen; Wang, Jyun-Sheng; Chang, Ya-Ting

doi:10.1016/j.jpowsour.2010.12.093

Cited by 11 publications

(6 citation statements)

References 22 publications

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“…[77] Improvement in the excess liquid water evacuation. [85][86][87][88][89][90] Freeze/thaw cycles Unchanged ohmic resistance [99] Reduction in the electrocatalyst surface area (ECSA). [96,97] Increase in the porosity of the electrode.…”

Section: Vibrationmentioning

confidence: 99%

“…This finding seems to be a promising route to mitigate PEFC water management issues. Indeed, recent studies carried out by Ma and co-workers[87][88][89][90] investigated the potential use of the so-called piezoelectric polymer electrolyte fuel cells (PZT-PEFCs). In these novel PZT-PEFCs, the piezoelectric actuators are placed on the cathode channels allowing the operation of an air breathing PEFCs by forcing the air into the channels and, at the same time, pumping out water during the compression phase of the PZT device.…”

mentioning

confidence: 99%

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Effects of mechanical compression on the performance of polymer electrolyte fuel cells and analysis through in-situ characterisation techniques - A review

Khetabi

Bouziane

Zamel

et al. 2019

Journal of Power Sources

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One of the factors that affect the polymer electrolyte fuel cell (PEFC) performance is the mechanical compression inside the stack. Although this compression plays an important role to ensure efficient gas sealing along with optimised electrical and thermal conductivities during PEFCs operation, excessive mechanical pressure may worsen the fuel cell performance through reducing the porosity and transport ability of PEFC components. In the last few years, intensive research studies have focused on the gas diffusion layers (GDLs) due to the strong relation of their compressibility with the performance of the PEFCs. A few review papers investigating the compression effect on individual fuel cell components have already been published. However, the evaluation of this effect on an operating PEFC has rarely been reviewed. This paper covers a comprehensive overview of the studies that have focused on the relationship between mechanical compression and the observed performance of a PEFC operating in real life conditions (in-situ). In this study, the effects of GDL properties with respect to the applied mechanical compression and the operating conditions are investigated. Much more work in literature has focused on GDL properties. Thus, an extended discussion is dedicated to this cell element in this paper.

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Section: Vibrationmentioning

confidence: 99%

mentioning

confidence: 99%

Effects of mechanical compression on the performance of polymer electrolyte fuel cells and analysis through in-situ characterisation techniques - A review

Khetabi

Bouziane

Zamel

et al. 2019

Journal of Power Sources

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“…Their studies , on a PZT‐PEMFC with a nozzle and diffuser showed that a PZT actuator could solve the water‐flooding problems in a cathode and improve the cell performance. Other studies , have also shown that an improved PZT‐PEMFC cell performance could be obtained by using an aspect ratio ( AR ) of 11.25 and diffuser angle ( θ ) of 5°. A schematic diagram showing the aspect ratio and diffuser angle is shown in Figure .…”

Section: Introductionmentioning

confidence: 98%

Development of a Bi‐cell Proton Exchange Membrane Fuel Cell with Optimized Groove‐designed Piezoelectric Actuator

Hsu

Luo

2017

Fuel Cells

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Previous studies demonstrated a piezoelectric proton exchange membrane fuel cell (PZT‐PEMFC) stack design composed of three bi‐cells in series and a single bi‐cell, with a maximum net power density of 0.1608 W cm−2. The present study developed a modified bi‐cell design with lower volume and weight by using gold‐plated aluminum 6061. A groove‐designed PZT actuator enclosed with poly‐di‐methyl‐siloxane (PDMS) curing for 30 min can reduce uneven air feeding. Such an actuator can also improve the performance of both sides of a bi‐cell, with only a 0.7% difference in the open circuit voltage (OCV). The experimental results showed that the net power density of the new version of the single bi‐cell PZT‐PEMFC module was 0.1658 W cm−2.

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“…Additionally, four FC stacks can be coupled before being connected to the power converter; this arrangement increases the total output voltage, but the system can be severely weakened when one or more FCs fails. Furthermore, previous studies [13][14][15] showed that a low-powered piezoelectric PEMFC stack (PZT-Stack) with a pseudo-bipolar design does not exhibit open circuit behavior even if one of the component cells fails in the electrical cascade configuration. The pseudo-bipolar design is used as the common cathode collector, and the collector support is constructed from a gold-plated copper plate to allow for conduction between the two component cells.…”

Section: Introductionmentioning

confidence: 99%

Compact Design of 10 kW Proton Exchange Membrane Fuel Cell Stack Systems with Microcontroller Units

Cheng

Fang

et al. 2014

Energies

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Abstract:In this study, fuel, oxidant supply and cooling systems with microcontroller units (MCU) are developed in a compact design to fit two 5 kW proton exchange membrane fuel cell (PEMFC) stacks. At the initial stage, the testing facility of the system has a large volume (2.0 m × 2.0 m × 1.5 m) with a longer pipeline and excessive control sensors for safe testing. After recognizing the performance and stability of stack, the system is redesigned to fit in a limited space (0.4 m × 0.5 m × 0.8 m). Furthermore, the stack performance is studied under different hydrogen recycling modes. Then, two similar 5 kW stacks are directly coupled with diodes to obtain a higher power output and safe operation. The result shows that the efficiency of the 5 kW stack is 43.46% with a purge period of 2 min with hydrogen recycling and that the hydrogen utilization rate µ f is 66.31%. In addition, the maximum power output of the twin-coupled module (a power module with two stacks in electrical cascade/parallel arrangement) is 9.52 kW.

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Development of a novel pseudo bipolar piezoelectric proton exchange membrane fuel cell with nozzle and diffuser

Cited by 11 publications

References 22 publications

Effects of mechanical compression on the performance of polymer electrolyte fuel cells and analysis through in-situ characterisation techniques - A review

Effects of mechanical compression on the performance of polymer electrolyte fuel cells and analysis through in-situ characterisation techniques - A review

Development of a Bi‐cell Proton Exchange Membrane Fuel Cell with Optimized Groove‐designed Piezoelectric Actuator

Compact Design of 10 kW Proton Exchange Membrane Fuel Cell Stack Systems with Microcontroller Units

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