Novel cathodal diffusion layer with mesoporous carbon for the passive direct methanol fuel cell

Cao, Jianyu; Wang, Liangduo; Song, Longfei; Xu, Juan; Wang, Honggang; Huang, Qinghong; Yang, Hui

doi:10.1016/j.electacta.2013.11.140

Cited by 27 publications

(14 citation statements)

References 32 publications

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“…Direct methanol fuel cells (DMFCs) are electrochemical devices that convert the chemical energy of reactants directly into electrical energy [1,2]. The DMFCs offers several advantages over the hydrogen feed polymer electrolyte membrane fuel cells (PEMFC) such as easy handling, storage and transportation of liquid methanol, high theoretical energy density, quick refueling, compact structure etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of diffusion layer compression on passive DMFC performance

Shrivastava

Thombre

Mallick

2014

Electrochimica Acta

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Section: Introductionmentioning

confidence: 99%

Effect of diffusion layer compression on passive DMFC performance

Shrivastava

Thombre

Mallick

2014

Electrochimica Acta

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“…The MC can increase the power density as high as 31.4 mW cm −2 at 3 M methanol, with a specific energy of 946 Wh kg −1 . However, neither Yuan et al 21 nor Cao et al 22 presented the relationship between the methanol crossover and MPL for high concentration of methanol.…”

Section: Introductionmentioning

confidence: 98%

“…Furthermore, Yuan et al 21 used graphenecarbon nanotubes (G-CNTs) as the MPL at the anode and obtained a power density of 41.6 mW cm −2 at 4 M methanol. Cao et al 22 used mesoporous carbon (MC) containing silicon nano-spheres and triblock copolymer F127 on the cathode as an MPL. The MC can increase the power density as high as 31.4 mW cm −2 at 3 M methanol, with a specific energy of 946 Wh kg −1 .…”

Section: Introductionmentioning

confidence: 99%

Structural mechanism investigation on methanol crossover and stability of a passive direct methanol fuel cell performance via modified micro‐porous layer

et al. 2021

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Methanol crossover affects the performance of a direct methanol fuel cell (DMFC). To overcome this problem, this study introduced a modified microporous diffusion layer (MPL) with addition of titanium dioxide (TiO 2 ) to the carbon nano-fibre (CNF) and carbon black (CB) material at the anode side of DMFC. The main objectives of this work were to present a surface characterization of the modified MPL via scanning electron microscopy (SEM) and discussed the detailed mechanism on the drop of the power density due to increment of methanol concentration. Secondly, this work also tested the performance and stability of the modified MPL. The SEM imaging showed a reduced surface crack at the anode diffusion layer in CB + TiO 2 , the pore network improved on the mixture of CNF-TiO 2 . Electrochemical impedance spectroscopy (EIS) showed that TiO 2 has low resistance and helps to reduce the resistance when added to the CNF and CB. These findings showed that the mixture of TiO 2 with CNF and CB presented a good effect in reducing the methanol crossover by presenting the lowest percentage for stability drop as 0.31% and 1.37% compared to other researchers. It also improved the stability of the DMFC power output over the long-term performance test. Highlights:• This study presents a surface characterization of the modified MPL of TiO 2 -CNF-CB • It also discusses in detail the mechanism on the power density drop due to increment of methanol concentration • This study will also test the performance and stability of the modified MPL.• The results show that the mixture of TiO 2 -CNF-CB improved the stability of the DMFC K E Y W O R D S anode diffusion layer, carbon nano-fibre, direct methanol fuel cell, titanium dioxide

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“…The performance was proved to be higher than conventional DMFC. Cao utilized mesoporous carbons to optimize the cathode diffusion layer [11]. Experiments showed that the improved diffusion layer could accelerate oxygen transport thus increase the power density and stability.…”

Section: Open Accessmentioning

confidence: 99%

Structure Design and Implementation of the Passive μ-DMFC

Liu

Fang

et al. 2015

Micromachines

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A dual-chamber anode structure is proposed in order to solve two performance problems of the conventional passive micro direct methanol fuel cell (μ-DMFC). One of the problems is the unstable performance during long time discharge. The second problem is the short operating time. In this structure, low concentration chamber is filled with methanol solution with appropriate concentration for the μ-DMFC. Pure methanol in high concentration chamber diffuses to the low concentration chamber to keep the concentration of methanol solution suitable for long-term discharge of μ-DMFC. In this study, a Nafion-Polytetrafluoroethylene (PTFE) composite membrane is inserted between the two chambers to conduct pure methanol. The experimental results during long-term discharge show that the stable operating time of passive μ-DMFC increases by nearly 2.3 times compared to a conventional one with the same volume. These results could be applied to real products.

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Novel cathodal diffusion layer with mesoporous carbon for the passive direct methanol fuel cell

Cited by 27 publications

References 32 publications

Effect of diffusion layer compression on passive DMFC performance

Effect of diffusion layer compression on passive DMFC performance

Structural mechanism investigation on methanol crossover and stability of a passive direct methanol fuel cell performance via modified micro‐porous layer

Structure Design and Implementation of the Passive μ-DMFC

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