Assuming GDL-less design is employed on the Toyota 2nd-gen Mirai PEMFC stack with identical cooling configuration, dimension of end plates, and operating conditions, the peak stack volumetric power density of GDL-less with and without endplates are 7.72 kW L-1 and 9.79 kW L-1, respectively, which are 76% and 81% greater than those of the 2nd ...
Proceedings of the 11th International Conference on Porous Metals and Metallic s (Met 2019) ... the heat transfer and fluid flow for a thin layer of metal inserted between two bipolar plates of fuel cell stack were simulated using ANSYS-Fluent 19.2, and both the local thermal equilibrium and the local thermal non-equilibrium ...
Lin et al. [21]suggested that alkaline fuel cell stack is not supposed to work exceed 343 K to avoid damage from heat accumulation. Additionally, ... The NiFeO x H y electrode was constructed on the basis of porous nickel (1.6 mm, purchased from Yannuo Technology Company, China) by two-step electrodeposition.
Various types of porous materials have been applied as flow fields or flow distributors of the PEM fuel cells. The metallic porous materials like nickel , etc. have …
Q ele, Q he, and Q 1 are defined as follows [38]: (1) Q ele = I · V (2) Q he = I (E r n cell-V) = Q 1 + Q 2 + Q 3 (3) Q 1 = q m ρ c p (T out-T in) where I and V are the current and voltage obtained by electronic load, E r represents the theoretical reversible voltage of fuel cell (typically about 1.254 V), n cell is the number of cells, q m ...
Ultrathin electrospun carbon nanofiber film combined with a porous metal flow field effectively reduces the cell thickness by shortening the reactive gas transport path to the …
Increasing power density is of paramount importance to the broad commercialization of proton exchange membrane fuel cells (PEMFCs). We present a redesigned structure employing graphene-coated nickel and electrospun carbon nanofiber film as alternatives to conventional channel-rib flow fields and GDLs. This ultrathin GDL-less design …
PEMFC consists of the core components such as the membrane electrode assembly (MEA) and bipolar plates (BPs) [6].BPs with flow fields play a key role in supporting electrodes, collecting electrons, and distributing gases evenly [7], [8].They account for 80-85% of the total weight and represent 40-50% of the total cost [9], [10], [11].Therefore, the improvement of fuel …
In book: Proceedings of the 11th International Conference on Porous Metals and Metallic s (Met 2019) (pp.171-179)
Overview of porous media/metal application in fuel cells and solar power systems ... A stack fuel cell will suffer losses but prefers to be stacked together to produce a higher power output. Fig. 6 illustrates the construction of a SOFC stack. ... All three cases tested showed nickel as an anode produced higher power density than fuel ...
As a result, this article figures out how to successfully handle the porous metal corrosion problem in a PEMFC setting, which increases the porous metal utilization in the fuel cell industry. This article also examined the flow field in …
The following performance curve provides the how well the ultra-thin titanium porous transfer layer does as an anode electrode. The membrane was Nafion 117, anode catalyst was 3.0 mg/cm2 IrRuOx, cathode catalyst was 3 mg/cm2 Pt black and the cell temperature was maintained at 80 deg Celsius.
The power of a fuel cell stack is given by Eq. (3) [21]. (3) P = N v j A M P S where P is stack power in kW, N is number of fuel cells in a stack, v is the voltage of a single cell in volts, j is current density in A/cm 2 and A MPS is the surface area of MPS in cm 2.
Kim et al. (2018b) used metal as the flow field of a small fuel cell stack (500 W) and confirmed the feasibility of metal flow field in fuel cell stacks. Bao et al. (2019) numerically analyzed the detailed two-phase flow in the pore-scale of the metal (MF) flow field with reconstructed the full three-dimensional morphology of MF ...
Clearly, we believe the applications of porous 3D graphene-nickel as flow-through anode not only enrich the choice of bio-electrode constructions, but also brighten up the field of micro-sized bio-energy sources. ... Evaluation of single and stack membraneless enzymatic fuel cells based on ethanol in simulated body fluids.
Metal has been applied to the electrodes, gas diffusion layer and flow field of fuel cells to enhance performance, especially in regard to current density and flow distribution. …
Proton exchange membrane fuel cells (PEMFCs) using porous metallic flow-field plates have been demonstrated as an alternative to conventional rib and channel designs, showing high performance at high currents. However, the transport of liquid product water through metal flow-field plates in PEMFC conditions is not well understood, …
Occasionally they can be found in fuel cells as well. ... resulting in poor compression in the stack, and thus high resistance and lower performance. You can still use carbon cloth or carbon paper material on the Hydrogen side (cathode) ... Nickel (80-120 PPI) - 1 mm. $74.00
Nickel felt is a porous material made from pure nickel metal. It has a three-dimensional network structure with interconnected pores that provide high surface area and excellent fluid transport characteristics. Nickel felt possesses several unique properties such as high thermal conductivity, high electrical conductivity, good corrosion resistance, and high mechanical strength. Due to …
Kim et al. (2018b) used metal as the flow field of a small fuel cell stack (500 W) and confirmed the feasibility of metal flow field in fuel cell stacks. ... Enhanced Mass Transfer Properties of Porous Nickel as Flow Field for Fuel Cells under Different Working Conditions. International Journal of Electrochemical Science, Volume ...
Ultrathin electrospun carbon nanofiber film combined with a porous metal flow field effectively reduces the cell thickness by shortening the reactive gas transport path to the catalyst layer and the path of generated …
Greenhouse gas (GHG) emissions are one of the critical environmental challenges affecting the quality of life [1, 2].As a remedy to this issue (i) European Union plans to reduce 80–95% CO 2 by 2050 w.r.t 1990 levels [1, 2]; (ii) The United States aims to create a reduction of 50–52% by 2030 w.r.t 2005 levels and reaching carbon-neutrality by 2050 [3]; and (iii) China, …
In rSOC, the gas transport process is usually calculated using the dust gas model (DGM) because of the porous electrodes [21], [22], [23].Finite element simulations require microscopic parameters such as porosity and tortuosity of the electrode, which are mostly estimated global parameters [24], [25], [26].Furthermore, the length of the TPB associated with …
We determined that the application of porous metal s improved the PEMFC performance by compensating for the drawback of the channel/rib-type flow field owing to the …
The channel/rib structure, commonly used in proton-exchange membrane fuel cells (PEMFC), has disadvantages of uneven pressure distribution, gas supply, and produced-water management under "rib" portion. In recent years, porous metal has been studied as an alternative flow field.
High-porosity metal , with the advantages, such as low price, good electrical and thermal conductivity, performs high performance as flow field for fuel cells. The mass transfer …
ed Nickel, Laboratory Fuel Cell , Porous Nickel , Supercapacitor Electrochemistry, Hydrogen Production by Electrolysis Catalyzer Carrier (L*W-200X300mm, 0.1mm Thickness): Industrial & Scientific
Here, we report a rapid and efficient microwave-assisted hydrothermal method to synthesize αβ-Ni(OH) 2 nanoflowers directly grown at the surface of nickel supports by substituting fluorine ions. The cyclic stability reveals that nickel hydroxide in mixed-phase is an ultrastable electrode material with almost capacitance retention after 5000 charging …
As a result, this article figures out how to successfully handle the porous metal corrosion problem in a PEMFC setting, which increases the porous metal utilization in the fuel cell industry.
With the development of proton exchange membrane fuel cells (PEMFCs), metal with lightweight advantages and highly porous structures has become p…
Nickel represents a highly porous flow medium ( > 97% volume porosity for battery-grade nickel s) based on the structure of polyurethane [4]. The surface area and functionality of ...
The superior performance of PEM fuel cell with metal as cathode flow field benefits a lot from the uniform gas flow. The porous metal material provides more …
Here, we report a rapid and efficient microwave-assisted hydrothermal method to synthesize αβ-Ni(OH) 2 nanoflowers directly grown at the surface of nickel supports by substituting fluorine ions. The cyclic stability reveals that nickel hydroxide in mixed-phase is an ultrastable electrode material with almost capacitance retention after 5000 charging …
Consequently, the cell voltage at high current density and LCD are effectively improved for fuel cells assembled with C@Ni compared to that of the bare Ni and serpentine flow field. The triple improvements in the intrinsic property result in effective enhancements in the electrochemical performance of PEMFCs.
Murphy et al. first used two flat porous metals, nickel and expanded titanium, ... Y. Application of Metal as a Flow Field for PEM Fuel Cell Stack. Fuel Cells 2018, 18, 123–128. [Google Scholar] Murphy, O.J.; Cisar, A.; Clarke, E. Low-cost light weight high power density PEM fuel cell stack. Electrochim.
Liu et al. [41] varied the humidification temperature from 50 °C to 80 °C at a cell temperature of 80 °C for the fuel cell with a nickel as the cathode flow field, and the. Corrosion mechanism. Porous metal materials attract considerable attention to be applied as flow field. However, they are prone to corrosion in the PEM fuel cells.
