An Active and Contaminants-Tolerant High-Entropy Electrode for Ceramic Fuel Cells
Source abstract
Abstract
Intermediate-temperature ceramic fuel cells are attractive for clean and efficient energy conversion. Their commercialization, however, is primarily impeded by insufficient electrode electrocatalytic activity for the oxygen reduction reaction (ORR) and poor tolerance against contaminants. Here we report our design of a layered high-entropy electrode, Pr 0.2 Sm 0.2 Nd 0.2 Gd 0.2 La 0.2 BaCo 2 O 5+δ (PSNGLBC), for fast and durable ORR. When it is used as an electrode on ceramic fuel cells, a low area-specific resistance of 0.010 Ω cm 2 and an impressive maximum power density of 2.03 W cm –2 are achieved at 800 °C. When Cr contamination is introduced, the high-entropy PSNGLBC electrode shows a dramatically enhanced durability compared to the PrBaCo 2 O 5+δ electrode. The improved ORR activity and stability and contaminants tolerance of the PSNGLBC electrode may be attributed to the synergistic enhancement of entropy-dominated stabilization effect and lattice distortion, significantly enhancing the electrocatalytic activity and promoting the formation of a stable crystal morphology and phase structure.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advancements in Solid Oxide Fuel Cells · Electronic and Structural Properties of Oxides · Magnetic and transport properties of perovskites and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
Research Institute of Renewable Energy and Advanced Materials, Zijin Mining Group Co., Ltd., Xiamen, Fujian 361101, China
South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou 510640, China
Redox Power Systems, College Park, Maryland 20742, United States
Beijing Huairou Laboratory, Beijing 101400, China
Funding
Guangdong Provincial Introduction of Innovative Research and Development Team · Zijin Mining Group · Guangdong Provincial Pearl River Talents Program · Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China
References (73)
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