Effect of anode current collector on the performance of passive direct methanol fuel cells

Lai, Qin-Zhi; Yin, Geping; Wang, Zhen‐Bo

doi:10.1002/er.1507

Cited by 27 publications

(17 citation statements)

References 30 publications

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“…Operating the cell without the SC (both GDEs were fixed on the same Nafion® 212 membrane) gave the best performance with 38(5) mW cm -2 maximum. This value is quite comparable to literature data for passive DMFCs, but for a semi-passive DMFC it seems to be worse [10,[14][15][16][17]. A reason for this might be that the GDE was not hot-pressed with the membrane and therefore the contact between them is not at its optimum.…”

Section: Results For the Current-voltage Characteristicssupporting

confidence: 84%

Novel Options and Limitations of Methanol‐Based Production and Storage for Mobile Applications

et al. 2014

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Methanol is considered a promising liquid fuel in context with electrochemical energy conversion and storage for mobile applications. It is shown here that a direct methanol fuel cell can be used for spontaneous charging and discharging a supercapacitor for intermediate storage of chemical energy. Thereby, protons and electrons of the methanol-derived hydrogen are stored separately in the electrical double layer of the supercapacitor electrode. The charging and discharging of this fuel cell-supercapacitor hybride device is investigated in experiments of spontaneous conditions (closed circuit) and also under externally enforced constant voltage sweep rate (cyclic voltammetry) and under constant current conditions. Alternatively, gas phase hydrogen is generated from methanol in an electroreforming process. When more efficient anode electrocatalysts become available this may become the method of choice for on-board and on demand hydrogen production in mobile applications.

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Section: Results For the Current-voltage Characteristicssupporting

confidence: 84%

Novel Options and Limitations of Methanol‐Based Production and Storage for Mobile Applications

et al. 2014

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“…The input power of the pump in the active ones is sometimes much larger than that of their output power. On the other hand, the delivered fuel in the passive system works through the capillary effect [17]; the fuel concentration gradient diffuses into the anode component [18]; the cohesion and adhesion pressure causes the liquid fuel to work against the gravity [19]. In our previous research, Y.F.…”

Section: Introductionmentioning

confidence: 94%

Carbon Nanotubes Modified Carbon Cloth Cathode Electrode for Self-Pumping Enzymatic Biofuel Cell

Duong

You

Huang

et al. 2018

Journal of Renewable Energy

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A self-pumping enzymatic biofuel cell (self-pumping EBC) with a new cathodic catalyst which was modified by coating the mixture of carbon nanotubes/caffeic acid (CNTs/CA) on a carbon cloth (CC) to form a CNTs/CA/CC cathode electrode was fabricated. By using UV spectrophotometer, the absorbance of CA, CNTs, and the CNTs/CA composite was observed. To evaluate how the CNTs/CA/CC cathodic electrode improves the electrochemical performance of the self-pumping EBC, the measurement of the redox reaction current peak by cyclic voltammetry (CV) was implemented. In accordance with CV measurement, the utilization of the modified CNTs/CA/CC cathodic electrode exhibited a higher oxygen reduction current peak at 319.1 A under the saturated oxygen. The anode and cathode flow rates were 0.416 ls −1 and 0.844 ls −1 which contribute to obtaining the capillary driven liquid efficiency as 30% for the former and 59% for the latter. Moreover, the self-pumping EBC performance tests showed that the maximum power density (MPD) of the self-pumping EBC with the modified cathodic electrode achieved 0.592 mWcm −2 which improved 10% in the performance compared with the bare CC electrode, 0.534 mWcm −2 .

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“…The direct methanol fuel cell (DMFCs) is considered to be a promising commercial energy conversion device for portable electronics and automotive applications due to its advantageous properties such as easy fuel storage, low operating temperature and simple structure . However, the commercialization of DMFCs is seriously restricted by its relatively low power density.…”

Section: Introductionmentioning

confidence: 99%

Pore‐forming technology and performance of MEA for direct methanol fuel cells

Liu

Wang

Zhang

et al. 2012

J of Chemical Tech & Biotech

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BACKGROUND: The commercialization of DMFCs is seriously restricted by its relatively low power density. Lots of work has been concentrated on catalysts with high activity, the optimization of flow path design, development of new kinds of proton exchange membrane and modification of Nafion membrane. Meanwhile, very few reports have involved the structure optimization of the membrane electrode assembly (MEA). To improve the performance of direct methanol fuel cells (DMFCs), the catalyst layer (CL) structures of anode and cathode were optimized by utilizing ammonium carbonate as pore forming agent. RESULTS: The polarization curves showed that in catalyst slurry the optimal content of ammonium carbonate was 50 wt%, and the DMFC performance was enhanced from 75.65 mW cm−2 to 167.42 mW cm−2 at 55 °C and 0.2 MPa O2. Electrochemical impedance spectroscopy and electrochemical active surface area (EASA) testing revealed that the improved performance of optimized MEAs could be mainly attributed to the increasing EASA and the enhanced mass transfer rate of CLs. But poor methanol crossover limited the performance enhancement of MEAs with porous anodes. CONCLUSION: With regard to improving cell performance, this pore‐forming technology is better applied to the cathode catalyst layer to improve its structure rather than the anode catalyst layer. © 2012 Society of Chemical Industry

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Effect of anode current collector on the performance of passive direct methanol fuel cells

Cited by 27 publications

References 30 publications

Novel Options and Limitations of Methanol‐Based Production and Storage for Mobile Applications

Novel Options and Limitations of Methanol‐Based Production and Storage for Mobile Applications

Carbon Nanotubes Modified Carbon Cloth Cathode Electrode for Self-Pumping Enzymatic Biofuel Cell

Pore‐forming technology and performance of MEA for direct methanol fuel cells

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