Effect of diffusion layer compression on passive DMFC performance

Shrivastava, Neeraj; Thombre, Shashikant B.; Mallick, Ranjan Kumar

doi:10.1016/j.electacta.2014.10.080

Cited by 37 publications

(15 citation statements)

References 25 publications

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“…Having more uniform pressure distribution of clamping force due to more contact surface between anode and cathode current collectors and GDL and therefore less contact resistance [20][21][22]. Table 1 Area and perimeter of the zones resulting from placing the cathode flow field design geometry on the anode flow field design (anode flow field: non-uniform parallel channels with opening to upward).…”

Section: The Performance Of the Cells In Various Methanol Concentrationsmentioning

confidence: 99%

Effect of anode and cathode flow field geometry on passive direct methanol fuel cell performance

Gholami

Imen

Shakeri

2015

Electrochimica Acta

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Section: The Performance Of the Cells In Various Methanol Concentrationsmentioning

confidence: 99%

Effect of anode and cathode flow field geometry on passive direct methanol fuel cell performance

Gholami

Imen

Shakeri

2015

Electrochimica Acta

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“…Shrivastava et al [2,29] examined the feasibility of the stainless steel wire mesh as current collector in a passive direct methanol fuel cell with a 25-cm 2 active area. They also investigated the effect of diffusion layer compression on the performance of passive direct methanol fuel cell (DMFC) under a constant active area [30]. Their study revealed that the cell performance can be enhanced drastically (200 to 340 % higher) by using the optimum diffusion layer compression.…”

Section: Introductionmentioning

confidence: 96%

“…DMFC is an electrical power generator that uses methanol as a hydrogen source and convert the electrochemical energy into electrical energy directly by using aqueous or vaporized methanol as a fuel at the anode and air or pure oxygen as the oxidant at the cathode . Based on fuel solution supply, DMFCs are classified into two major types, which are known as passive and active DMFCs [23][24][25][26][27][28][29][30][31][32][33][34][35]. The difference between these two types consists of pumping and delivering fuel to the reaction sites and electrical controls [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Experimental studying of the effect of active area on the performance of passive direct methanol fuel cell

Hashemi

Yousefi

Faraji

2015

Ionics

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This work experimentally studies the effect of the size and shape of active area on the performance of passive direct methanol fuel cell. The obtained results show that the cell performance strongly depends on the size and shape of active area. Experimental results of this study also demonstrate that the cell performance improves with an increase in the size of active area. Increasing the size of active area also leads to a lower internal resistance, lower OCV, and higher operating temperature. Furthermore, it was found that the smallest active area (4 cm 2 ) produced the longest stable discharging voltage (about 16.5 h). This study also reveals that the square active area has the best performance and the highest power density compared to the rectangular and circular active areas. Finally, the results prove that the place of applying the clamping force is an important parameter that should be considered in the cell design.

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“…In this context, platinum-based catalysts are the most used for ORR [1]. However, methanol crossover [2][3][4][5][6][7] from anode to cathode poisons the platinum-based catalysts, thereby affecting their ORR catalytic activity. Due to the high cost, scarcity, and poisoning issue, platinum-based catalysts need to be replaced with low-cost, methanoltolerant catalysts.…”

Section: Introductionmentioning

confidence: 99%

Carbon-supported Co(III) dimer for oxygen reduction reaction in alkaline medium

Sheelam

Mandal

Thippani

et al. 2016

Ionics

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Non-precious metal electrocatalysts obtained by pyrolysis of precursors of metal, nitrogen, and carbon (MNC) are viewed as an inexpensive replacement for platinum-based electrocatalysts for the oxygen reduction reaction (ORR) in fuel cells. The hypothesized ORR active site structure of typical MNC catalysts consists of a transition metal coordinated to the pyridinic/pyrollic type of nitrogen covalently attached to the edges of the graphitic crystallites. One of the drawbacks of all the reported procedures to synthesize these MNC electrocatalysts is the inability to control the formation of a specific active site structure suitable for ORR. Lack of clarity on the active site structure limits the researcher's ability to design a synthesis methodology that maximizes the specific active site density. In this study, we have synthesized a Co(III) dimer ([Co 2 (OH) 2 (OOCCH 3 ) 3 (bpy) 2 ] NO 3 ⋅ 1.5 H 2 O) and demonstrated its ORR activity in alkaline medium. The ORR activity and methanol tolerance property of the Co(III) dimer were compared with those of Ketjenblack carbon (used as support for Co(III) dimer) and commercial 20 wt% Pt/C, respectively. Since Co(III) dimer is a molecular material, its characterization by single-crystal X-ray diffraction, nuclear magnetic resonance, and infrared studies revealed the chemical structure unambiguously. Density functional theory calculation predicted the possibility of both end-on and side-on oxygen adsorption at the metal center of the Co(III) dimer.

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Effect of diffusion layer compression on passive DMFC performance

Cited by 37 publications

References 25 publications

Effect of anode and cathode flow field geometry on passive direct methanol fuel cell performance

Effect of anode and cathode flow field geometry on passive direct methanol fuel cell performance

Experimental studying of the effect of active area on the performance of passive direct methanol fuel cell

Carbon-supported Co(III) dimer for oxygen reduction reaction in alkaline medium

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