Performance of polyethylene based radiation grafted anion exchange membrane with polystyrene-b-poly (ethylene/butylene)-b-polystyrene based ionomer using NiCo2O4 catalyst for water electrolysis

Gupta, Gaurav; Scott, Keith; Mamlouk, Mohamed

doi:10.1016/j.jpowsour.2017.07.026

Cited by 48 publications

(84 citation statements)

References 32 publications

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“…Ionic conductivity of the membrane was 0.09 S cm −1 at 50 °C and 100% RH , . The ionic conductivity of the SEBS ionomer at 100% RH was 0.14 S cm −1 and 0.18 S cm −1 at 50 and 70 °C, respectively .…”

Section: Characterization Of Ionomer and Membranesmentioning

confidence: 99%

“…Degree of grafting (S3) of the membrane based on initial weight (DOG) is 67.5% and IEC (S4) is 2.3 mmol g -1 with final hydrated membrane thickness of 75 μm [12,20]. The ion exchange capacity of the SEBS ionomer was 1.91 mmol g -1 and the degree of chloromethylation (S5) was 49% [18].…”

Section: Measurement Of the Ion-exchange Capacity (Iec)mentioning

confidence: 99%

“…The current publication focusses on utilizing SEBS based soluble ionomer with the aim of operating the fuel cell at 70 °C. The ionomer has been used previously for DMAFC , redox flow battery , AEMFC at 50 °C , AEM electrolysers but never been tried for AEMFC at 70 °C. In a follow up publication we will report the system performance under various anode and cathode relative humidity and temperature conditions to give further insight on AEM water management issues.…”

Section: Introductionmentioning

confidence: 99%

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Soluble Polystyrene‐b‐poly (ethylene/butylene)‐b‐polystyrene Based Ionomer for Anion Exchange Membrane Fuel Cells Operating at 70 °C

2018

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A soluble ionomer based on styrene‐ethylene/butylene‐styrene (SEBS) block polymer was synthesized with an ion exchange capacity (IEC) of 1.91 mmol g−1 and OH− ion conductivity at 100% relative humidity (RH) of 0.14 and 0.18 S cm−1 at 50 and 70 °C, respectively. The performance of the membrane electrode assembly (MEA) with SEBS ionomer was highest compared to polyvinyl benzyl chloride (PVBC) and Acta I2 ionomers at 0.5 V at both 50 °C (239 mW cm−2) and 70 °C (285 mW cm−2) using air and low‐density polyethylene (LDPE) membrane. This was largely due to the lower charge transfer resistance measured for the MEA using SEBS ionomer which is due to higher IEC, better water uptake and water retention properties. Ionomer water permeability is also critical for the back diffusion and the membrane where SEBS ionomer showed large advantage over PVBC ionomer. The long‐term testing of 50 h at 50 and 70 °C also showed better durability of the SEBS compared to the commercial Acta I2 ionomer with an average performance loss of 3 mA h−1 at 50 °C. The MEAs tested at 70 °C failed after 15 h (Acta I2) and 25 h (SEBS) due to pin‐hole formation in the membrane.

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Section: Characterization Of Ionomer and Membranesmentioning

confidence: 99%

Section: Measurement Of the Ion-exchange Capacity (Iec)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Soluble Polystyrene‐b‐poly (ethylene/butylene)‐b‐polystyrene Based Ionomer for Anion Exchange Membrane Fuel Cells Operating at 70 °C

2018

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“…The first such systems were reported around 2011/2012 and evaluated with either pure water [7][8][9] or with addition of alkaline solutions [10][11][12]. Notably, the ionomeric phase in gas diffusion type electrodes is challenging, and better cell polarization performance is generally observed with increasing hydroxide concentration [13,14]. Impressive cell polarization was even achieved without anionexchange ionomer in 1 M KOH, with Nafion as electrocatalyst binder [15,16].…”

Section: Introductionmentioning

confidence: 99%

Blend membranes of polybenzimidazole and an anion exchange ionomer (FAA3) for alkaline water electrolysis: Improved alkaline stability and conductivity

Konovalova

Kim

et al. 2018

Journal of Membrane Science

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“…While for NiO particles, the peak position appearing at 2θ = 43.3° can be indexed to (200) reflection of face-centered cubic (fcc) NiO. XRD pattern of Fe3O4 nanoparticles is shown in the Fig 2.a The peaks at 2θ values of 32.32°, 35.4°, 43.38°, 53.36°, and 63.12° are indexed as the diffractions of (311), (222), (422), (511) and (440) respectively, which indicate the standard diffraction spectrum of Fe3O4 (JCPDS no.19-0629) (13,14). , varying x from 0 to 1, catalyst powder prepared using co-precipitation with NaOH as precipitating agent and annealing in reducing atmosphere 5% H2 / 95% Ar at 500 o C for 4 hours.…”

Section: Resultsmentioning

confidence: 99%

Bimetallic Nano Electrocatalyst for HER in Alkaline Polymer Electrolysis

Faid,

Manikandan,

Seland

et al. 2018

Meet. Abstr.

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Ni and alloys of Ni (with Fe, Co, Mo) still represent the most suitable electrodes for HER in alkaline media. Bimetallic nanoparticles of NiFe and NiCo were fabricated by coprecipitation and thermal reduction by oleylamine. The process of co-precipitation involves NaOH as a precipitation agent to precipitate the metal-based nitrates, while thermal reduction process involves the synthesis of metal-containing compounds using oleylamine, which act as reducing agent, surfactant, and solvent. Different synthesis conditions in terms of composition were studied. Structural characterization of nanoparticles was carried out using scanning electron microscopy, energy dispersive x-ray, X-ray diffraction, Raman spectroscopy and BET surface area. Electrochemical behavior of nanoparticles was investigated using rotating disk electrode. The electrochemical characterization studied the effect of catalyst composition on the electrochemical behavior of the catalyst.Recent developments in alkaline membrane technology have led to the possibility of using anion-exchange membranes containing alkaline ions (OH -, CO3 2-, HCO3 -) in water electrolysis. This technology has the potential of combining the advantage of nonprecious catalysts of the alkaline process, with the advantages of PEMEL, e.g. fast power-up/power-down rates, low parasitic energy losses, and low energy consumption, in other words consolidating the best of both technologies (3).

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Performance of polyethylene based radiation grafted anion exchange membrane with polystyrene-b-poly (ethylene/butylene)-b-polystyrene based ionomer using NiCo2O4 catalyst for water electrolysis

Cited by 48 publications

References 32 publications

Soluble Polystyrene‐b‐poly (ethylene/butylene)‐b‐polystyrene Based Ionomer for Anion Exchange Membrane Fuel Cells Operating at 70 °C

Soluble Polystyrene‐b‐poly (ethylene/butylene)‐b‐polystyrene Based Ionomer for Anion Exchange Membrane Fuel Cells Operating at 70 °C

Blend membranes of polybenzimidazole and an anion exchange ionomer (FAA3) for alkaline water electrolysis: Improved alkaline stability and conductivity

Bimetallic Nano Electrocatalyst for HER in Alkaline Polymer Electrolysis

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