Study on improvement of the selectivity of proton exchange membrane via incorporation of silicotungstic acid-doped silica into SPEEK

Chia, Min Yan; Thiam, Hui San; Leong, Loong Kong; Koo, Chai Hoon; Saw, Lip Huat

doi:10.1016/j.ijhydene.2019.11.010

Cited by 34 publications

(19 citation statements)

References 36 publications

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“…When the loading of mPTA is at 0.5 wt%, the weight percentage of tungsten is at 53.45% and it constantly increases with the increase of mPTA loading. Although it was claimed that tungsten can help to stabilise mPTA in the polymer matrix, there exists an optimum ratio between tungsten and phosphorus [18]. The results showed that mPTA fillers have been successfully anchored to the SPEEK membrane matrix.…”

Section: Surface Morphology Of Speek-mpta Membranesmentioning

confidence: 96%

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Composite Proton Electrolyte Membranes C Poly Ether-Ether Ketone (SPEEK) at Various Amount of Mesoporous Phosphotungstic Acid (mPTA) for Hydrogen Fuel Cell Application

Mehanathan

Mohamed

Jaafar

et al. 2020

AMST

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Polymer electrolyte membrane fuel cells (PEMFC), also known as proton exchange membrane fuel cells utilise polymer electrolyte membranes (PEMs) to conduct protons for ion-exchange purposes. Nafion is a common polymeric material to be used as PEM for fuel cells. However, Nafion has major weaknesses such as low proton conductivity under anhydrous conditions at elevated temperatures due to water evaporation and continuous need for water management, low tolerance for fuel impurities and high cost. This study fabricates a newly composite PEM by blending SPEEK and mesoporous phosphotungstic acid (mPTA) at various loading in order to obtain the most favourable PEMFC power output. SP/2.0mPTA membrane has shown outstanding properties in terms of dense structure, 35.75% of water uptake and expected an elemental mapping of 76.20% Tungsten and 23.80% Phosphorus. Even with a lower proton conductivity of 3.502 mScm-1, this membrane has a higher power density of 154.4 mW/cm2 compared to the other four membranes. Owing to the unique characteristics of the as-synthesized mPTA such as high surface area, porous structure, good thermal and chemical resistance, SPEEK-mPTA membrane is one of the promising materials for PEMFC applications.

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Section: Surface Morphology Of Speek-mpta Membranesmentioning

confidence: 96%

“…The results showed that mPTA fillers have been successfully anchored to the SPEEK membrane matrix. However, excessive mPTA loading tends to cause agglomeration of tungsten and phosphorus that will consequently reduce the effective area of mPTA towards conducting protons [18]. [19].…”

Section: Surface Morphology Of Speek-mpta Membranesmentioning

confidence: 99%

Composite Proton Electrolyte Membranes C Poly Ether-Ether Ketone (SPEEK) at Various Amount of Mesoporous Phosphotungstic Acid (mPTA) for Hydrogen Fuel Cell Application

Mehanathan

Mohamed

Jaafar

et al. 2020

AMST

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“…Chia et al 41 created SPEEK/SiO 2 ‐SiWA composite membranes with great selectivity as well as excellent electrochemical characteristics. To increase the stability of soluble SiWA in the polymer matrix, additive loading and coupling agents were used.…”

Section: Derivatives Of Speek Polymermentioning

confidence: 99%

A review on sulfonated poly (ether ether ketone) based‐membrane in direct borohydride fuel cell applications

Harun

Shaari

2022

Intl J of Energy Research

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Summary Direct borohydride fuel cell (DBFC) is a liquid fuel cell technology that has a number of advantages, including lower operating temperature as well as great cell voltage when compared with hydrogen as well as alcohol fuel cell. The utilisation of reagent in liquids, under room pressures as well as temperatures, facilitated the internal processes of the fuel cell system and its application. Polymer electrolyte membranes or proton exchange membrane are an important component of fuel cells. Commercial perfluorosulphonic acid type membranes such as Nafion are often used in DBFC systems. However, Nafion has some disadvantages such as high cost, low stability at high temperatures, and low conductivity at low humidity or high temperatures that limit its use in DBFC systems. Thus, this review accounts the cheaper alternative membrane than Nafion that applied for DBFC which is sulfonated poly ether ether ketone (SPEEK) based membrane. The mixing of SPEEK with other filler such as graphitic carbon nitride (g‐C3N4), clay, silica, metal oxide, heteropoly acids, and carbon nanotube is being discussed. The properties of SPEEK membranes performance such as degree of sulfonation, water intake, ionic conductivity, BH4 crossover as well as mechanical strength in DBFC were studied.

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“…Moreover, liquid methanol is low cost, environmentally friendly, easy to distribute, and stores and handles under standard conditions. Methanol also has a high energy density [ 7 , 8 ]. According to Joghee et al, the energy density of methanol is 15 times higher than lithiumion batteries [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

A State-of-Art on the Development of Nafion-Based Membrane for Performance Improvement in Direct Methanol Fuel Cells

Thiam

Pang

et al. 2022

Membranes

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Nafion, a perfluorosulfonic acid proton exchange membrane (PEM), has been widely used in direct methanol fuel cells (DMFCs) to serve as a proton carrier, methanol barrier, and separator for the anode and cathode. A significant drawback of Nafion in DMFC applications is the high anode-to-cathode methanol fuel permeability that results in over 40% fuel waste. Therefore, the development of a new membrane with lower permeability while retaining the high proton conductivity and other inherent properties of Nafion is greatly desired. In light of these considerations, this paper discusses the research findings on developing Nafion-based membranes for DMFC. Several aspects of the DMFC membrane are also presented, including functional requirements, transport mechanisms, and preparation strategies. More importantly, the effect of the various modification approaches on the performance of the Nafion membrane is highlighted. These include the incorporation of inorganic fillers, carbon nanomaterials, ionic liquids, polymers, or other techniques. The feasibility of these membranes for DMFC applications is discussed critically in terms of transport phenomena-related characteristics such as proton conductivity and methanol permeability. Moreover, the current challenges and future prospects of Nafion-based membranes for DMFC are presented. This paper will serve as a resource for the DMFC research community, with the goal of improving the cost-effectiveness and performance of DMFC membranes.

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Study on improvement of the selectivity of proton exchange membrane via incorporation of silicotungstic acid-doped silica into SPEEK

Cited by 34 publications

References 36 publications

Composite Proton Electrolyte Membranes C Poly Ether-Ether Ketone (SPEEK) at Various Amount of Mesoporous Phosphotungstic Acid (mPTA) for Hydrogen Fuel Cell Application

Composite Proton Electrolyte Membranes C Poly Ether-Ether Ketone (SPEEK) at Various Amount of Mesoporous Phosphotungstic Acid (mPTA) for Hydrogen Fuel Cell Application

A review on sulfonated poly (ether ether ketone) based‐membrane in direct borohydride fuel cell applications

A State-of-Art on the Development of Nafion-Based Membrane for Performance Improvement in Direct Methanol Fuel Cells

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