Enhanced electrochemical performance of Ca-doped NdBa1-xCaxCoCuO5+δ as cathode material for intermediate-temperature solid oxide fuel cells
Source abstract
Abstract
Abstract Exploring advanced cathode materials that have high electrochemical activity and superior thermal compatibility with other components is of great importance for the application of intermediate-temperature solid oxide fuel cells. In the present study, influences of Ca doping on electrochemical and physicochemical properties of NdBa 1-x Ca x CoCuO 5+δ were studied systematically. A relatively low thermal expansion coefficient (16.8 × 10 −6 °C −1 ) was obtained for the Ca-doped sample over the temperature range of 25–800 °C. Moreover, Ca doping significantly enhanced the electrochemical performance of NdBa 1-x Ca x CoCuO 5+δ . The highest densities of power for NdBa 1-x Ca x CoCuO 5+δ -based single cells at the temperatures of 800 °C increased from 1.42 W cm −2 for x = 0.0 to 1.84 W cm −2 for x = 0.3. This increase in electrochemical performance of NdBa 1-x Ca x CoCuO 5+δ cathode with Ca doping can be ascribed to enhanced concentrations of oxygen vacancies and higher electrical conductivity.
Source: openaire · Quality: candidate unverified · Source record ↗
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.
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