A Low-Lewis-Acid-Strength Cation Cs+-Doped Double Perovskite for Fast and Durable Oxygen Reduction/Evolutions on Protonic Ceramic Cells
Source abstract
Abstract
Improving the reaction kinetics and durability of air electrodes on protonic ceramic cells is effective for their commercialization but challenging. Here, we report our electrode design via a low-Lewis-acid-strength cation (Cs + ) doping strategy on a double perovskite oxide with a detailed formula of PrBa 0.9 Cs 0.1 Co 2 O 5+δ (PBCsC). At 600 °C, the PBCsC electrode demonstrates a low area-specific resistance (ASR) value of 0.3 Ω cm 2 within 100 h without significant degradation due likely to the electron pair shift by the polarization distribution of ionic Lewis acid strength at A and B sites. At 650 °C, a full cell with the PBCsC electrode displays an encouraging peak power density of 1.66 W cm –2 in the fuel cell (FC) mode, a high current density of −2.85 A cm –2 (at 1.3 V) in the electrolysis (EC) mode, good operational stability in dual modes of FC and EC, and promising cycling durability of 20 cycles in ∼80 h.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advancements in Solid Oxide Fuel Cells · Electronic and Structural Properties of Oxides · Perovskite Materials and Applications
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
Beijing Huairou Laboratory, Beijing 101400, China
College of Photonics, National Yang Ming Chiao Tung University, Tainan 71150, Taiwan
Funding
Special Project for Research and Development in Key areas of Guangdong Province · Basic and Applied Basic Research Foundation of Guangdong Province · Zijin Mining Group · Guangdong Provincial Pearl River Talents Program · Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China
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