Influence of renewable energy power fluctuations on water electrolysis for green hydrogen production

International Journal of Hydrogen Energy, Journal Year: 2022, Volume and Issue: 48(12), P. 4572 - 4593

Published: Nov. 24, 2022

The development of renewable energy technologies is essential to achieve carbon neutrality. Hydrogen can be stably stored and transported in large quantities maximize power utilization. Detailed understanding the characteristics operating methods water electrolysis technologies, which naturally intermittent fluctuating used directly, required for green hydrogen production, because power-driven processes significantly differ from industrial driven by steady grid power. Thus, it necessary overcome several issues related direct use This article reviews its generation as well current status operation conditions, electrolyzer configuration, system requirements, stack/catalyst durability, degradation mechanisms under sources. It also provides an accelerated test protocol method fair catalyst performance comparison share effective design directions. Finally, discusses potential challenges recommendations further improvements components systems suitable practical use, suggesting that a breakthrough could realized toward achievement sustainable hydrogen-based society.

Language: Английский

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High-Entropy Perovskite Oxide: A New Opportunity for Developing Highly Active and Durable Air Electrode for Reversible Protonic Ceramic Electrochemical Cells

Nano-Micro Letters, Journal Year: 2022, Volume and Issue: 14(1)

Published: Nov. 9, 2022

Reversible proton ceramic electrochemical cell (R-PCEC) is regarded as the most promising energy conversion device, which can realize efficient mutual of electrical and chemical to solve problem large-scale storage. However, development robust electrodes with high catalytic activity main bottleneck for commercialization R-PCECs. Here, a novel type high-entropy perovskite oxide consisting six equimolar metals in A-site, Pr1/6La1/6Nd1/6Ba1/6Sr1/6Ca1/6CoO3-δ (PLNBSCC), reported high-performance bifunctional air electrode R-PCEC. By harnessing unique functionalities multiple elements, be anticipated accelerate reaction rates both fuel electrolysis modes. Especially, an R-PCEC utilizing PLNBSCC achieves exceptional performances, demonstrating peak power density 1.21 W cm-2 cell, while simultaneously obtaining astonishing current - 1.95 A at voltage 1.3 V temperature 600 °C. The significantly enhanced performance durability attributed mainly electrons/ions conductivity, fast hydration reactivity configurational entropy. This research explores new avenue develop optimally active stable

Language: Английский

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Attempted preparation of La _0.5Ba _0.5MnO _{3− δ} leading to an in-situ formation of manganate nanocomposites as a cathode for proton-conducting solid oxide fuel cells

Journal of Advanced Ceramics, Journal Year: 2023, Volume and Issue: 12(6), P. 1189 - 1200

Published: March 27, 2023

A La_0.5Ba_0.5MnO_3-δ oxide was prepared using the sol-gel technique. Instead of a pure phase, discovered to be combination La_0.7Ba_0.3MnO_3-δ and BaMnO₃. The in-situ production La_0.7Ba_0.3MnO_3-δ+BaMnO₃ nanocomposites enhanced oxygen vacancy formation compared single-phase La_0.7Ba_0.3MnO_3-δ- or BaMnO₃, providing potential benefits as cathode for fuel cells. Subsequently, La_0.7Ba_0.3MnO_3-δ-+BaMnO₃ were utilized proton-conducting solid cells (H-SOFCs), which significantly improved cell performance. At 700 ^oC, an H-SOFC with La_0.7Ba_0.3MnO_3-δ+ BaMnO₃ nanocomposite achieved highest power density yet recorded H-SOFCs manganate cathodes: 1504 mW cm^-2. This performance much greater than In addition, demonstrated excellent working stability. First-principles calculations indicated that La_0.7Ba_0.3MnO_3-δ/BaMnO₃ interface crucial reduction reaction (ORR) free energy barrier lower at surfaces, explained origins high gave guide construction novel cathodes H-SOFCs.

Language: Английский

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BaCo0.4Fe0.4Nb0.1Sc0.1O3-δ perovskite oxide with super hydration capacity for a high-activity proton ceramic electrolytic cell oxygen electrode

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 472, P. 144878 - 144878

Published: July 18, 2023

Language: Английский

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Synergistic dual-phase air electrode enables high and durable performance of reversible proton ceramic electrochemical cells

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Jan. 11, 2024

Abstract Reversible proton ceramic electrochemical cells are promising solid-state ion devices for efficient power generation and energy storage, but necessitate effective air electrodes to accelerate the commercial application. Here, we construct a triple-conducting hybrid electrode through stoichiometry tuning strategy, composed of cubic phase Ba 0.5 Sr Co 0.8 Fe 0.2 O 3−δ hexagonal 4 (Co ) 16−δ . Unlike common method creating self-assembled hybrids by breaking material tolerance limits, strategy adjusting stoichiometric ratio A-site/B-site not only achieves strong interactions between phases, also can efficiently modifies contents. When operate as an reversible cell, with unique dual-phase synergy shows excellent performance current density 3.73 A cm −2 @ 1.3 V in electrolysis mode peak 1.99 W fuel cell at 650 °C.

Language: Английский

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Current and further trajectories in designing functional materials for solid oxide electrochemical cells: A review of other reviews

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: 94, P. 302 - 331

Published: March 8, 2024

Language: Английский

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Proton-conducting solid oxide electrolysis cells: Relationship of composition-structure-property, their challenges, and prospects

Matter, Journal Year: 2023, Volume and Issue: 6(6), P. 1782 - 1830

Published: June 1, 2023

Language: Английский

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Manipulating Nb-doped SrFeO _{3− δ} with excellent performance for proton-conducting solid oxide fuel cells

Journal of Advanced Ceramics, Journal Year: 2024, Volume and Issue: 13(5), P. 579 - 589

Published: March 18, 2024

The Nb-doped SrFeO_3-δ material is used as a cathode in proton-conducting solid oxide fuel cells (H-SOFCs). First-principles calculations show that the SrFe_0.9Nb_0.1O_3-δ (SFNO) has lower energy barrier reaction for H-SOFCs than Nb-free cathode. Subsequent experimental studies Nb-doping substantially enhances performance of Then, oxygen vacancies (V_o) were introduced into SFNO using microwave sintering method, further improving mechanism behind improvement owing to V_o was revealed first-principles calculations, with optimization achieved by developing suitable wet chemical synthesis route prepare nanosized materials. This method significantly reduces grain size compared traditional solid-state although generally preparing Nb-containing oxides. As result defect engineering and approaches, an attractive cell performance, attaining output 1764 mW cm^-2 at 700 °C operating more 200 h. Manipulation can be seen "one stone, two birds" strategy, enhancing while retaining good stability, thus providing interesting approach constructing high-performance cathodes H-SOFCs.

Language: Английский

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In Situ Engineering of a Cobalt‐free Perovskite Air Electrode Enabling Efficient Reversible Oxygen Reduction/Evolution Reactions

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(43)

Published: June 25, 2023

Abstract Reversible protonic ceramic electrochemical cells (R‐PCECs) have received increasing focus for their good capability of converting and storing energy. However, the widely used cobalt‐based air electrodes are less thermomechanically compatible with electrolyte lack stability, which largely limits development R‐PCECs. Herein, a cobalt‐free perovskite nominal composition PrBa 0.8 Ca 0.2 Fe 1.8 Ce O 6 δ (PBCFC) is reported, in–situ engineered to (Ba, Ce) deficient‐PBCFC phase, BaCeO 3 , CeO 2 phase under typical operating conditions, delivering low area–specific resistance 0.10 Ωcm at 700 o C. The generated particles increase conduction/transfer protons oxygen ions, thus providing extra active sites reactions. When utilized as an electrode on single cell, it achieves encouraging performance °C: peak power density 1.78 Wcm −2 current 5.00 Acm 1.3 V in dual mode fuel cell (FC) electrolysis (EL) reasonable Faradaic efficiencies. In addition, exhibit favorable operational durability 65 h (FC mode), 95 (EL promising cycling stability 200 h.

Language: Английский

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Fundamental Understanding and Applications of Protonic Y‐ and Yb‐Coped Ba(Ce,Zr)O₃ Perovskites: State‐of‐the‐Art and Perspectives

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(47)

Published: Nov. 1, 2023

Abstract Proton‐conducting oxide materials are interesting objects from both fundamental and applied viewpoints due to the origination of protonic defects in a crystal structure as result their interaction with hydrogen‐containing atmospheres at elevated temperatures. The high mobility such temperatures between 400 700 °C leads superior ionic conductivity. As result, some perovskite‐type proton‐conducting oxides have been proposed electrolytes for solid fuel electrolysis cells. Barium cerate (BaCeO 3 ), barium zirconate (BaZrO cerate‐zirconates –BaZrO ) widely studied terms parent phases electrolytes. Among them, Y Yb co‐doped Ba(Ce,Zr)O can be identified one most promising systems so far. This review discloses key functional properties explains increased attention researchers this system.

Language: Английский

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