评估 Ca3Co2O6 作为高性能固体氧化物燃料电池阴极材料。

Evaluation of Ca3Co2O6 as cathode material for high-performance solid-oxide fuel cell.

机构信息

State Key Laboratory of Material Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China.

出版信息

Sci Rep. 2013;3:1125. doi: 10.1038/srep01125. Epub 2013 Jan 24.

DOI:10.1038/srep01125

PMID:23350032

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3553459/

Abstract

A cobalt-based thermoelectric compound Ca(3)Co(2)O(6) (CCO) has been developed as new cathode material with superior performance for intermediate-temperature (IT) solid-oxide fuel cell (SOFC). Systematic evaluation has been carried out. Measurement of thermal expansion coefficient (TEC), thermal-stress (σ) and interfacial shearing stress (τ) with the electrolyte show that CCO matches well with several commonly-used IT electrolytes. Maximum power density as high as 1.47 W cm(-2) is attained at 800°C, and an additional thermoelectric voltage of 11.7 mV is detected. The superior electrochemical performance, thermoelectric effect, and comparable thermal and mechanical behaviors with the electrolytes make CCO to be a promising cathode material for SOFC.

摘要

一种基于钴的热电化合物 Ca(3)Co(2)O(6)（CCO）已被开发为新型阴极材料，用于中温（IT）固体氧化物燃料电池（SOFC），具有卓越的性能。已经进行了系统的评估。通过对热膨胀系数（TEC）、热应力（σ）和界面剪切应力（τ）与电解质的测量表明，CCO 与几种常用的 IT 电解质具有良好的匹配性。在 800°C 时，获得高达 1.47 W cm(-2) 的最大功率密度，并检测到额外的热电电压 11.7 mV。CCO 具有优异的电化学性能、热电效应以及与电解质相当的热机械性能，使其成为 SOFC 的一种很有前途的阴极材料。