Development of a direct methanol fuel cell stack fed with pure methanol

Li, Xianglin; Faghri, Amir

doi:10.1016/j.ijhydene.2012.07.096

Cited by 26 publications

(6 citation statements)

References 27 publications

(23 reference statements)

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“…It is found that the whole stack is able to generate an open circuit voltage of 2.37 V, a peak power of 1771.8 mW, and a maximum current of 1441 mA. Such a superior performance, that outperforms the majority of conventional liquid alcohol cell stacks at the same size in the open literature, − therefore, presents this system to be of great potential in realizing practical applications in the future.…”

Section: Resultsmentioning

confidence: 91%

Manipulation of Electrode Composition for Effective Water Management in Fuel Cells Fed with an Electrically Rechargeable Liquid Fuel

Shi

Huo

Esan

et al. 2022

ACS Appl. Mater. Interfaces

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The liquid fuel cell, with its high energy density and ease of fuel handling, has attracted great attention worldwide. However, its real application is still being greatly hindered by its limited power density. Hence, the recently proposed and demonstrated fuel cell, using an electrically rechargeable liquid fuel (e-fuel), is believed to be a candidate with great potential due to its significant performance advancement. Unlike the conventional alcoholic liquid fuels, the e-fuel possesses excellent reactivity, even on carbon-based materials, which therefore allows the e-fuel cell to achieve superior performance without any noble metal catalysts. However, it is found that, during the cell operation, the water generated at the cathode following the oxygen reduction reaction could lead to a water flooding problem and further limit the cell performance. To address this issue, in this work, by manipulating the cathode composition, a blended binder cathode using both Nafion and polytetrafluoroethylene as binding agents is fabricated and demonstrated its superiority in the fuel cell to achieve an enhanced water management and cell performance. Furthermore, using the developed cathode, a fuel cell stack is designed and fabricated to power a 3D-printed toy car, presenting this system as a promising device feasible for future study and real applications.

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Section: Resultsmentioning

confidence: 91%

Manipulation of Electrode Composition for Effective Water Management in Fuel Cells Fed with an Electrically Rechargeable Liquid Fuel

Shi

Huo

Esan

et al. 2022

ACS Appl. Mater. Interfaces

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“…This is the stage of catalyst activation for the Pt cat-NPs during the polarization. [20] In this study the current was preferred to be normalized to the footprint of working electrode (1.5 × 10 −4 cm 2 ) but not to the tubular area (1.45 × 10 −3 cm 2 ) based on practical fabrication size for the integrated circuit. As the current density is further increased, e.g., up to ≈740 mA cm −2 , the cell voltage was relatively stable within 0.20-0.30 V. A maximum power density of 156 mW cm −2 is obtained.…”

Section: Fuel Cellsmentioning

confidence: 99%

“…The µ DMFC fabricated with Pt‐RuO 2 ‐RUMT has an open circuit potential ( V oc ) of 0.425 V. At the initial stage of the discharging operation, the cell voltage was found to decrease quickly when the current density is increased from zero to ≈100 mA cm −2 . This is the stage of catalyst activation for the Pt cat‐NPs during the polarization . In this study the current was preferred to be normalized to the footprint of working electrode (1.5 × 10 −4 cm 2 ) but not to the tubular area (1.45 × 10 −3 cm 2 ) based on practical fabrication size for the integrated circuit.…”

mentioning

confidence: 99%

Microtubular Fuel Cell with Ultrahigh Power Output per Footprint

Miao

Liang

et al. 2017

Advanced Materials

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A novel realization of microtubular direct methanol fuel cells (µDMFC) with ultrahigh power output is reported by using "rolled-up" nanotechnology. The microtube (Pt-RuO -RUMT) is prepared by rolling up Ru O layers coated with magnetron-sputtered Pt nanoparticles (cat-NPs). The µDMFC is fabricated by embedding the tube in a fluidic cell. The footprint of per tube is as small as 1.5 × 10 cm . A power density of ≈257 mW cm is obtained, which is three orders of magnitude higher than the present microsized DFMCs. Atomic layer deposition technique is applied to alleviate the methanol crossover as well as improve stability of the tube, sustaining electrolyte flow for days. A laminar flow driven mechanism is proposed, and the kinetics of the fuel oxidation depends on a linear-diffusion-controlled process. The electrocatalytic performance on anode and cathode is studied by scanning both sides of the tube wall as an ex situ working electrode, respectively. This prototype µDFMC is extremely interesting for integration with micro- and nanoelectronics systems.

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“…In addition, there have also been attempts to employ alternate-current (ac) techniques, which could yield important and detailed information from every single measurement [6][7][8][9][10][11][12][13]. Unfortunately, application of such ac methods to monitor the FC characteristics is still somewhat limited, due to the complexity of employed electrochemical equipment [11,12].…”

Section: Introductionmentioning

confidence: 99%

Impedance monitoring of fuel cell stacks

Ślepski

Janicka

Darowicki

et al. 2014

J Solid State Electrochem

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This paper presents an innovative, electrochemical impedance method for monitoring of electrochemical behaviour of a multi-cell, direct methanol fuel cell (DMFC) device. This method not only provides classical voltage changes at successive cells but also allows their detailed impedance behaviour to be presented. Impedance characteristics of individual cells within a fuel cell stack (depending on actual operating conditions) are obtained via numerous electrochemical tasks, including simultaneous determination of each cell's impedances, performance optimization of the fuel cell stack and effective detection of faulty cells within the stack. The above concerns in situ conditions. The effectiveness of the present method was studied here on a seven-cell, commercially made DMFC stack. In order to effectively detect faulty cells, selected experiments were carried out with insufficient amount of oxygen supplied to a cathode input (ca. 25 % of optimal oxidant dose was used).

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Development of a direct methanol fuel cell stack fed with pure methanol

Cited by 26 publications

References 27 publications

Manipulation of Electrode Composition for Effective Water Management in Fuel Cells Fed with an Electrically Rechargeable Liquid Fuel

Manipulation of Electrode Composition for Effective Water Management in Fuel Cells Fed with an Electrically Rechargeable Liquid Fuel

Microtubular Fuel Cell with Ultrahigh Power Output per Footprint

Impedance monitoring of fuel cell stacks

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