摘要
研究了原位Cu析出和CuCo双金属析出的钇掺杂钛酸锶(YST)材料在作为直接碳燃料电池(DC-SOFCs)阳极时的结构及性能。首先采用燃烧法制备系列Co掺杂的Y0.08Sr0.92Ti0.9-xCu0.1CoxO3-δ(x=0,0.1,0.2,0.3)阳极材料。通过XRD、SEM、TEM等表征材料微观结构,结果表明Co掺杂量达到0.2时,氢气还原后的阳极材料析出均匀分布的CuCo双金属纳米颗粒。电导率测试表明CuCo双金属纳米颗粒有效提高了材料的电导率。CO氛围下的阻抗测试表明,析出CuCo双金属纳米颗粒的Co0.2阳极材料具有最小的极化阻抗,催化活性优于其他阳极材料,以其作为阳极的电池在800℃和碳为燃料时,最大功率密度可达591 mW·cm^-2,且具有良好的稳定性,是一种优异的DC-SOFC阳极材料。
In this paper,the structure and performance of in-situ Cu precipitation and CuCo bimetallic precipitation of yttrium-doped strontium titanate(YST)materials as direct carbon fuel cell(DC-SOFCs)anodes were studied.A series of Co doped Y0.08Sr0.92Ti0.9-xCu0.1CoxO3-δ(x=0,0.1,0.2,0.3)anode materials are prepared by combustion method.XRD,SEM and TEM techniques are used to study the anode materials'microstructure.When Co doping content reaches to 0.2,the CuCo bimetal nanoparticles are uniformly precipitated on anode after hydrogen reduction.The conductivity test shows that CuCo bimetallic nanoparticles can effectively improve the conductivity of the material.The impedance test in CO atmosphere showed that the smallest polarization impedance is obtained for Co0.2 anode material with precipitated CuCo bimetallic nanoparticles,and its catalytic activity is better than that of other samples.Then,the cell using Y0.08Sr0.92Ti0.7Cu0.1Co0.2 material as the anode exhibits good stability and excellent electrochemical performance at 800℃,with a maximum power density of 591 mW·cm^-2.It is shown that the Y0.08Sr0.92Ti0.7Cu0.1Co0.2 is an excellent DC-SOFC anode material.
作者
陈海涛
乔金硕
王振华
孙旺
李海军
孙克宁
CHEN Haitao;QIAO Jinshuo;WANG Zhenhuan;SUN Wang;LI Haijun;SUN Kening(Laboratory of Chemical Power Source and Green Catalysis,School of Chemistry and Chemical Engineering,Beijing Institute of Technology,Beijing 100084,China;Yinlong Energy Co.,Ltd.,Zhuhai 519000,Guangdong,China)
出处
《化工学报》
EI
CAS
CSCD
北大核心
2020年第9期4270-4281,共12页
CIESC Journal
基金
国家自然科学基金项目(21576028,21376001,21506012)。
关键词
原位析出
纳米颗粒
阳极
燃料电池
电化学
in-situ precipitation
nanoparticles
anode
fuel cells
electrochemistry
作者简介
第一作者:陈海涛(1994-),男,硕士研究生,1355107484@qq.com;通信作者:乔金硕(1980-),女,博士,高级实验师,qjinshuo@bit.edu.cn。
