Characterization of a liquid feed direct methanol fuel cell with Sierpinski carpets fractal current collectors

Chang, Jing-Yi; Kuan, Yean‐Der; Lee, Shi‐Min; Lee, Shah-Rong

doi:10.1016/j.jpowsour.2008.06.024

Cited by 25 publications

(12 citation statements)

References 12 publications

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“…Generally, fuel cell systems consist of the following major compartments: the gas diffusion layer (GDL), catalyst layer (CL), and polymer electrolyte membrane (PEM). The membrane electrode assemblies (MEAs) consist of a membrane and catalyst for both the cathode and anode . The proton electrolyte membrane is located at the center of the fuel cell system as a controller for electrons, fuel flow, and passage for proton transfer, and it inhibits the reaction from occurring, thus maintaining chemical and mechanical stability .…”

Section: Introductionmentioning

confidence: 99%

“…The membrane electrode assemblies (MEAs) consist of a membrane and catalyst for both the cathode and anode. 9,10 The proton electrolyte membrane is located at the center of the fuel cell system as a controller for electrons, fuel flow, and passage for proton transfer, and it inhibits the reaction from occurring, thus maintaining chemical and mechanical stability. 11 Due to the important function of the PEM, many studies have developed the PEM with the following requirements: high proton conductivity; low fuel crossover; good mechanical, thermal, and oxidative stability; and an economical fabrication process.…”

Section: Introductionmentioning

confidence: 99%

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Recent advances in additive‐enhanced polymer electrolyte membrane properties in fuel cell applications: An overview

2019

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Summary Additives such as fillers, cross‐linkers, and plasticizers have become increasingly important in the polymer nanocomposite production field, especially for enhancing the structural morphology, functional behavior, and final performance of nanocomposites in broad applications. The current work is an overview of the effects of additive substances such as fillers, cross‐linkers, and plasticizers in the polymer electrolyte membrane composites applied to fuel cells. A comparative review is conducted by categorizing fillers into several types, and the most popular cross‐linkers and plasticizers used in fuel cell membranes are included in this review. The highlighted properties include the proton conductivity, permeability, mechanical properties, thermal properties, crystallinity, and structure of additive‐modified nanocomposites. Furthermore, the challenges and future prospects in the additive field are discussed in Section 5.0. This review can provide a reference for researchers seeking specific substances that can be used to enhance nanocomposite properties, especially in membrane fuel cell applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recent advances in additive‐enhanced polymer electrolyte membrane properties in fuel cell applications: An overview

2019

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“…9 The assembly between the membrane and catalyst for the cathode and anode is known as the membrane electrode assembly (MEA). 10,11 Figure 1 presents the main component and reaction involved in the DMFC system. Given that the polymer electrolyte membrane plays an essential role in fuel cells, the selection of membrane material should fulfill the required criteria, including high proton conduction, decent mechanical properties, good thermal stability, and minimum fuel crossover.…”

Section: Introductionmentioning

confidence: 99%

Ionic liquid‐modified materials as polymer electrolyte membrane and electrocatalyst in fuel cell application: An update

Shaari

Ahmad

Bahru

et al. 2021

Intl J of Energy Research

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Ionic liquids (ILs) are promising solvents for catalytic and electrolyte applications, gas absorption, and extractions in electrochemical systems due to their useful features, such as high conductivity and good thermal, chemical, and electrical stability. This review focuses on incorporating ILs into fuel cell (FC) systems, specifically into two main components of FC (ie, polymer electrolyte membrane and electrocatalyst). In FC, a polymer electrolyte membrane with excellent conductivity and deprived of humidity even at high temperatures must be created for effective early commercialization of this technology.Electrocatalyst performance can also be enhanced with additive materials, such as ILs, thus further improving the entire achievement of FCs. This work discusses the most important reasons for ongoing studies and outlines the current progress in using ILs as a revolutionary form of polymer electrolyte membrane and electrocatalyst.

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“…At cathode, the reduction reaction of oxygen was reacted with electrons and air to produce ion hydroxides. The results of hydroxide ions were carried through electrolyte membranes to the anode side . Hou et al worked in the performance of Nafion 112 doped with KOH solution.…”

Section: Introductionmentioning

confidence: 99%

Enhanced alkaline stability and performance of alkali‐doped quaternized poly(vinyl alcohol) membranes for passive direct ethanol fuel cell

2019

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Summary Direct ethanol fuel cells (DEFCs) emerge as the new research energy field since fast production of electricity, high efficiency conversion, and simple fabrication process. The production cost, conductivity properties, and ethanol permeability of membrane were the main problem that limited the DEFC performance and commercialization. In this study, a low cost, good ionic conductivity and low ethanol permeability of an anion exchange membrane based on incorporation KOH‐doped quaternized poly(vinyl alcohol) (QPVA) membrane (designed as QPVA/KOH) is synthesized and cross‐linked with glutaraldehyde solution. The membrane is expected to cut the production cost and enhance the performance. In this work, an optimum of alkali‐doped concentration has influence the membrane performance. The membrane has reveal high chemical stability even doped with 8‐M KOH solution in 100°C. The morphology of membranes remained unbreakable and achieved high range of ionic conductivity (~10−2 S cm−1). The membranes present maximum ionic conductivity 1.29 × 10−2 S cm−1 at 30°C and 3.07 × 10−2 S cm−1 at 70°C. The ethanol permeability of membrane is lower compared with the commercial membranes. Power density of alkaline DEFCs with platinum‐based catalyst by using cross‐linked QPVA/KOH membrane is 5.88 mW cm−2, which is higher than commercial membranes at 30°C temperature. At 70°C, power density has increased up to 11.28 mW cm−2 and significantly increased up to 22.82 mW cm−2 via the nonplatinum‐based catalyst. Moreover, according to the durability test, the performance of passive alkaline DEFC by using cross‐linked QPVA/KOH membrane has maintained at 36.2% level. With such efficiency, the stack current density has been able to stay above 120 mA cm−2 for over 1000 hours, at 70°C.

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Characterization of a liquid feed direct methanol fuel cell with Sierpinski carpets fractal current collectors

Cited by 25 publications

References 12 publications

Recent advances in additive‐enhanced polymer electrolyte membrane properties in fuel cell applications: An overview

Recent advances in additive‐enhanced polymer electrolyte membrane properties in fuel cell applications: An overview

Ionic liquid‐modified materials as polymer electrolyte membrane and electrocatalyst in fuel cell application: An update

Enhanced alkaline stability and performance of alkali‐doped quaternized poly(vinyl alcohol) membranes for passive direct ethanol fuel cell

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