A review on proton conducting electrolytes for clean energy and intermediate temperature-solid oxide fuel cells

Hossain, Shahzad; Abdalla, Abdalla M.; Jamain, Siti Noorazean Binti; Zaini, Juliana; Azad, Abul K.

doi:10.1016/j.rser.2017.05.147

Cited by 329 publications

(180 citation statements)

References 117 publications

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“…The BST and LSC doped‐perovskite nanoparticles provide high surface areas and so high interfacial interactions between the doped‐perovskite nanoparticles, PA, and PBI to have a good proton transfer in the nanocomposite membranes. The doped‐perovskite nanoparticles showing high proton conductivity are commonly crystallized with cubic or near‐cubic (orthorhombic, rhombohedral) symmetries . The perovskite nanoparticles can endure some deviations from the ideal structure.…”

Section: Resultsmentioning

confidence: 99%

“…The doped-perovskite nanoparticles showing high proton conductivity are commonly crystallized with cubic or near-cubic (orthorhombic, rhombohedral) symmetries. 41,42 The perovskite nanoparticles can endure some deviations from the ideal structure. In addition, mobile oxygen vacancies have a significant effect on the proton conductivity of the LSC doped-perovskite nanoparticles.…”

Section: Proton Conductivity Of Nanocomposite Membranesmentioning

confidence: 99%

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Novel nanocomposite membranes based on PBI and doped‐perovskite nanoparticles as a strategy for improving PEMFC performance at high temperatures

2020

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Summary In this work, Sr2+ dopant effects of Ba0.9Sr0.1TiO3 and La0.9Sr0.1CrO3‐δ doped‐perovskite nanoparticles on increasing proton conductivity, fuel cell performance, and mechanical and thermal stability of polybenzimidazole‐based nanocomposite membranes were studied. The Sr2+ dopant creates cation vacancies in Ba0.9Sr0.1TiO3 doped‐perovskite nanoparticles and oxygen vacancies in La0.9Sr0.1CrO3‐δ doped‐perovskite nanoparticles. The oxygen vacancies, which decrease columbic repulsion between protons and positive ions, have a more important role than the cation vacancies. They provide high surface area and high interfacial interaction between La0.9Sr0.1CrO3‐δ doped‐perovskite nanoparticles, phosphoric acid, and polybenzimidazole for proton transfer and increase the proton conductivity of the nanocomposite membranes. In addition, the results of relative humidity effects showed that the ordered arrangement of oxygen vacancies of the La0.9Sr0.1CrO3‐δ doped‐perovskite nanoparticles creates a specific pathway in the nanocomposite membranes for increasing proton transfer in the presence of relative humidity. Furtheremore, at phosphoric acid doping level of 13 mol phosphoric acid per monomer unit, proton conductivity of the nanocomposite membranes containing 8 wt.% La0.9Sr0.1CrO3‐δ doped‐perovskite nanoparticles was obtained as 126 mS cm‐1 at 180°C and 6% relative humidity. The nanocomposite membrane showed the best performance and the power density of 0.62 W cm‐2 at 180°C and 0.5 V.

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Section: Resultsmentioning

confidence: 99%

Section: Proton Conductivity Of Nanocomposite Membranesmentioning

confidence: 99%

Novel nanocomposite membranes based on PBI and doped‐perovskite nanoparticles as a strategy for improving PEMFC performance at high temperatures

2020

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“…They have major impact in solving the global energy demand. IT-SOFCs have attracted great attention because of their low temperature operation, potential long term stability, environmental friendliness and economic affordability for many applications (including stationary and automotive) [1][2][3][4][5][6]. The operation temperature range of oxide ion conducting SOFC is 800-1000 °C which is quite high and dictated by the choice of electrolyte material (oxide-ion conductors) such as Yttria-Stabilized Zirconia (YSZ), put numerous challenges like high cost and long-term stability issues [7].…”

Section: Introductionmentioning

confidence: 99%

“…It showed a relative density of ~95% after firing at 1450 °C as well as better densification when processed via solid state reaction method; while for BZCY and BZCYYb, a sintering temperature 1550 °C was required for getting a densification  90% when processed by the same (solid state reaction) method [31,33]. 5 Among the perovskite oxides, doped barium cerates exhibit mixed oxide and proton ion conductivity [38] upon exposure to stream atmospheres. Proton conductivity can be significantly improved by doping various rare earth ions such as Y, Yb, Eu, Gd, Nd, etc or using Sr [39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Highly dense and novel proton conducting materials for SOFC electrolyte

Hossain

Abdalla

Zaini

et al. 2017

International Journal of Hydrogen Energy

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Highly dense proton conducting materials of BCZYSZn (BaCe 0.8-x Zr x Y 0.15 Sm 0.05 O 3-δ (x = 0.15, 0.20) with 4 wt.% ZnO as sintering additive), to be used as an intermediate temperature solid oxide fuel cells (IT-SOFCs) electrolyte, have been processed by the conventional solid state reaction method. The crystalline phase, microstructure, electrical properties, cell performance and chemical stability of the materials have been investigated. The ionic conductivity of BCZYSZn 3 (x = 0.20) material has been measured to be ~2.56  10 -3 S cm −1 and ~8.32  10 -3 S cm −1 at 600 °C and 850 °C, respectively in wet 5%H 2 in Ar atmosphere. Microstructural characterizations of the zinc containing materials (BCZYSZn) show the formation of highly dense morphology with very large grains. The chemical stability test of BCZYSZn in pure CO 2 2shows that the material is very stable up to 1000 °C. The maximum power density for the BCZYSZn 3 electrolyte cell is found to be 0.42 W/cm 2 at 700 °C under the testing atmosphere.The performed characterizations reveal that these are suitable proton-conducting candidate materials for efficient electrochemical devices.

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“…These materials have their own drawbacks mostly related to chemical compatibility and cost resulting in limited large-scale usage. 5 Unlike YSZ which conducts oxygen ions, there has recently been a new trend in developing electrolytes that conduct protons as shown by following equation with Kröger Vink notation: Proton conducting electrolytes (PCEs) have two main advantages, first, they do not dilute the fuel which lowers the performance based on the Nernst equation. 7 Also, due to their relatively low activation energy of conduction due to smaller size of H + , they can achieve high conductivity at lower temperatures.…”

mentioning

confidence: 99%

High Performance Tubular Solid Oxide Fuel Cell Based on Ba_0.5Sr_0.5Ce_0.6Zr_0.2Gd_0.1Y_0.1O_3-δProton Conducting Electrolyte

Amiri

Singh

Sandhu

et al. 2018

J. Electrochem. Soc.

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In this work, synthesis and characterization of an anode supported tubular solid oxide fuel cell based on Ba 0.5 Sr 0.5 Ce 0.6 Zr 0.2 Gd 0.1 Y 0.1 O 3-δ (BSCZGY) electrolyte has been investigated. Anode-supported Ni -yttria-stabilized zirconia (YSZ) anode was fabricated via slip casting; BSCZGY electrolyte and BSCZGY -La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 (LSCF) composite cathode were coated on support using dip coating, respectively. The chemical compatibility of fuel cell components at sintering temperatures has been investigated by powder X-ray diffraction, and no severe reactions were detected. Electrochemical examination under air/H 2 + 3 vol. % H 2 O showed superior performance achieving a maximum power density of 1 W/cm 2 at 850 • C, among the best compared to tubular -geometry oxygen conductor solid oxide fuel cells reported earlier and one of the highest reported for a proton conductor electrolyte in literature. Electrochemical impedance spectroscopy was used to examine the electrochemical performance of the full cell at different temperatures, and a detailed analysis was done to distinguish the contribution of ohmic and polarization resistances of the cell. ASR values were 3.47 .cm 2 , 1.81 .cm 2 , 1.23 .cm 2 , and 1.05 .cm 2 at 600, 700, 800, and 850 • C, respectively. Analysis of activation energy associated with charge and mass transfer based on fitting of impedances revealed that concentration polarization is the major contributor to the total resistance. The long-term stability for more than 96 hours of operation under load showed no significant degradation, which demonstrated the steady behavior of the cell. A solid oxide fuel cell (SOFC) is a solid-state electrochemical device which converts the chemical energy stored in the fuel directly into electrical energy resulting in high efficiency which along with low environmental impact, quiet operation, and low maintenance makes SOFC highly suitable for stationary power generation applications. 1Traditional SOFCs employ Ni-YSZ cermet, oxide-ion conducting yttria-stabilized zirconia (YSZ), and lanthanum strontium manganite as the anode, electrolyte and cathode, respectively.2 To reduce the overpotentials associated with these materials, the cell needs to run at elevated temperatures near 1000• C. 3 This negatively affects the choice of available materials mostly for interconnects and sealants and their long-term stability. 4 To reduce the operating temperature of SOFC, one of the alternative is to develop new materials for cell components. Oxide ion conducting electrolytes La 0.9 Sr 0.1 Ga 0.

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A review on proton conducting electrolytes for clean energy and intermediate temperature-solid oxide fuel cells

Cited by 329 publications

References 117 publications

Novel nanocomposite membranes based on PBI and doped‐perovskite nanoparticles as a strategy for improving PEMFC performance at high temperatures

Novel nanocomposite membranes based on PBI and doped‐perovskite nanoparticles as a strategy for improving PEMFC performance at high temperatures

Highly dense and novel proton conducting materials for SOFC electrolyte

High Performance Tubular Solid Oxide Fuel Cell Based on Ba_0.5Sr_0.5Ce_0.6Zr_0.2Gd_0.1Y_0.1O_3-δProton Conducting Electrolyte

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A review on proton conducting electrolytes for clean energy and intermediate temperature-solid oxide fuel cells

Cited by 329 publications

References 117 publications

Novel nanocomposite membranes based on PBI and doped‐perovskite nanoparticles as a strategy for improving PEMFC performance at high temperatures

Novel nanocomposite membranes based on PBI and doped‐perovskite nanoparticles as a strategy for improving PEMFC performance at high temperatures

Highly dense and novel proton conducting materials for SOFC electrolyte

High Performance Tubular Solid Oxide Fuel Cell Based on Ba0.5Sr0.5Ce0.6Zr0.2Gd0.1Y0.1O3-δProton Conducting Electrolyte

Contact Info

Product

Resources

About

High Performance Tubular Solid Oxide Fuel Cell Based on Ba_0.5Sr_0.5Ce_0.6Zr_0.2Gd_0.1Y_0.1O_3-δProton Conducting Electrolyte