Heterointerface engineering for enhancing the electrochemical performance of solid oxide cells

Zhao, Cezhou; Li, Yifeng; Zhang, Wenqiang; Zheng, Yun; Lou, Xiaoming; Yu, Bo; Chen, Jing; Chen, Yan; Liu, Meilin; Wang, Jianchen

doi:10.1039/c9ee02230a

Cited by 208 publications

(156 citation statements)

References 331 publications

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“…For example, Cui et al [90] incorporated Co into lanthanum titanate (LSCoT, La 0.3 Sr 0.7 Co 0.07 Ti 0.93 O 3−δ ) to achieve a cobalt-based exsolution anode material. Although cobalt and nickel have similar affinities for sulfur [91], the authors reported the anode based on exsolved Co was stable for 48 h operating in 5000 ppm H 2 S.…”

Section: Discussionmentioning

confidence: 99%

Metal Exsolution to Enhance the Catalytic Activity of Electrodes in Solid Oxide Fuel Cells

et al. 2020

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Exsolution is a novel technology for attaching metal catalyst particles onto ceramic anodes in the solid oxide fuel cells (SOFCs). The exsolved metal particles in the anode exhibit unique properties for reaction and have demonstrated remarkable stabilities under conditions that normally lead to coking. Despite extensive investigations, the underlying principles behind exsolution are still under investigation. In this review, the present status of exsolution materials for SOFC applications is reported, including a description of the fundamental concepts behind metal incorporation in oxide lattices, a listing of proposed mechanisms and thermodynamics of the exsolution process and a discussion on the catalytic properties of the resulting materials. Prospects and opportunities to use materials produced by exsolution for SOFC are discussed.

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Section: Discussionmentioning

confidence: 99%

Metal Exsolution to Enhance the Catalytic Activity of Electrodes in Solid Oxide Fuel Cells

et al. 2020

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Section: Interface Engineering Of Air Electrocatalystsmentioning

confidence: 99%

“…After forming a nanointerface between two dissimilar materials, the mismatches in Fermi levels ( E f ) or work functions will likely lead to charge transfer across the interface, which is accompanied by the breaking of electrical neutrality and the variety of charge density. [ 39 ] Specifically, the electrons will flow from the component with high E f to the one with low E f until reaching equilibrium. The accompanied energy band bending at the interface controls the flow of charge carriers.…”

Section: Effects For Interface Engineeringmentioning

confidence: 99%

“…It is noteworthy that the abovementioned effects do not operate separately, and as a rule, are directly or indirectly interrelated and together constitute the fundamentals of interface engineering. [39,40] With regard to increasing the number of active sites, downsizing the particle to achieve high exposed surface area is a realistic approach. [41] Particularly, single-atom catalysts (SACs), which symbolize downsizing the nanoparticles into monodispersed single atoms, have been extensively developed.…”

Section: Interface Engineering Of Air Electrocatalystsmentioning

confidence: 99%

“…When two dissimilar materials with different lattice constants are in direct contact, lattice strain can be generated near the interface region due to the lattice mismatch between the adjacent phases (Figure 5a). [69,39,40] Such a strain can be defined in several forms, which corresponds to a particular circumstance. [70] In the case of small strains, for example, the definition of the strain along a line is (l f − l i )/l i , where l f and l i refer to the atomic bond length in the final state and the initial state, respectively.…”

Section: Strainmentioning

confidence: 99%

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Interface Engineering of Air Electrocatalysts for Rechargeable Zinc–Air Batteries

Luo

Sun

et al. 2020

Advanced Energy Materials

170

124

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In the face of high costs and the insufficient energy density of current lithiumion batteries, aqueous rechargeable zinc (Zn)-air batteries with the advantages of low cost, environmental benignity, safety, and high energy density have been growing in importance in recent years. The practical application of Zn-air batteries, however, is severely restricted by the high overpotential, which is associated with the inherent sluggish kinetics of the oxygen evolution reaction (OER) and the oxygen reduction reaction (ORR) of air electrocatalysts. Recently, engineering heterostructured/hybrid electrocatalysts with modulated interface chemistry have been demonstrated as an effective strategy to improve the catalytic performance. Significant electronic effects, geometric effects, coordination effects, synergistic effects, and confinement effects occur at the heterostructure interface, which intensely affect electrocatalysts' performance in terms of intrinsic activity, active site density, and durability. In this review, the recent progress in the development of heterostructured air electrocatalysts by interface engineering is summarized. Particularly, the potential relationship between interface chemistry and oxygen electrocatalysis kinetics is bridged and outlined. This review provides a comprehensive and in-depth outline of the crucial role of the well-defined interfaces towards fast oxygen electrocatalysis, and offers a solid scientific basis for the rational design of efficient heterostructured air electrocatalysts and beyond.

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Manipulating and Optimizing the Hierarchically Porous Electrode Structures for Rapid Mass Transport in Solid Oxide Cells

Hou

Pan

et al. 2022

Adv Funct Materials

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Over the past decades, considerable efforts have been made to develop hierarchically porous electrodes for the high surface area, the fast velocity of fuels/products to/away from the reaction site, and the high loading of thermal-and/or electrochemical-catalysts. Manipulation of the hierarchical structure is one of the key steps for high performance in applications of efficient energy storage and conversion such as solid oxide cells. This review starts with a brief introduction to the basic concept of mass transport and how mass transport may affect performance. Then, the latest developments in enhancing the performance of cells through modification or optimization of the hierarchically porous electrode structures, including altering the geometry or morphology and increasing the triple-phase boundaries length of electrodes are summarized. Subsequently, the unique characteristics of microstructures that are critical to enhancing electrode performance and provide important insights into the mechanisms of performance (activity and durability) enhancement, aiming at achieving the rational design of better electrode architecture are highlighted. Finally, the remaining challenges for the knowledge-based design of highly efficient electrodes for electrochemical devices, together with possible directions and future perspectives for the development of highly efficient electrodes through optimization of microstructure are discussed.

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Heterointerface engineering for enhancing the electrochemical performance of solid oxide cells

Abstract: This article overviews the latest developments in enhancing the conductivity, electro-catalytic activity, and stability of SOC materials through heterointerface engineering.

Cited by 208 publications

References 331 publications

Metal Exsolution to Enhance the Catalytic Activity of Electrodes in Solid Oxide Fuel Cells

Metal Exsolution to Enhance the Catalytic Activity of Electrodes in Solid Oxide Fuel Cells

Interface Engineering of Air Electrocatalysts for Rechargeable Zinc–Air Batteries

Manipulating and Optimizing the Hierarchically Porous Electrode Structures for Rapid Mass Transport in Solid Oxide Cells

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