浸渍纳米复相电极对CO_(2)可逆固体氧化物电池的性能影响  

Effect of Infiltrated Nanocomposite on Electrode Performance of CO_(2) Reversible Solid Oxide Cells

作　　者：朱诗悦 吴亮 夏长荣[2] 卢肖永 陈永红 田冬 ZHU Shiyue;WU Liang;XIA Changrong;LU Xiaoyong;CHEN Yonghong;TIAN Dong(Anhui Province Key Laboratory of Low Temperature Co-fired Materials,Department of Chemistry and Engineering,Huainan Normal University,Huainan 232038,Anhui,China;Department of Materials Science and Engineering,University of Science and Technology of China,Hefei 230026,Anhui,China)

机构地区：[1]淮南师范学院化学与材料工程学院低温共烧材料安徽省重点实验室,安徽淮南232038 [2]中国科学技术大学材料科学与工程系,安徽合肥230026

出　　处：《陶瓷学报》2022年第5期879-888,共10页Journal of Ceramics

基　　金：科技部国家重点研发计划(2021YFE0100200)。

摘　　要：CO_(2)的可逆固体氧化物电池(rSOC),是实现能源储存和“碳中和循环”的有效能源转化装置。传统的Ni基燃料电极因其在CO_(2)中的稳定性而受到制约,近些年,钙钛矿作为替换金属陶瓷用于rSOC的电极材料,因其有良好的电子电导率、离子电导率和催化活性而应用广泛。此外,将钙钛矿与具有较高离子电导性的电解质材料复合,其构成的三相线异质结构对电极的电化学反应有协同优化作用。采用氧化还原稳定性较好的(La_(0.75)Sr_(0.25))_(0.95)Cr_(0.5)Mn_(0.5)O_(3−δ)(LSCM)燃料电极,并用浸渍Ce_(0.8)Sm_(0.2)O_(2−δ)(SDC)的方法构筑LSCM-SDC纳米三相界面。实验表明,在电池和电解两种模式下,纳米复相电极与纯LSCM电极相比均有着更高的表面交换速率和电极电化学反应活性。Reversible solid oxide cell(rSOC)with CO_(2) are effective energy conversion devices for energy storage and"carbon neutrality".The traditional Ni-based fuel electrode is limited by its stability in CO_(2).In recent years,perovskite has been widely used as electrode to replace cermet in rSOC,because of its high electronic conductivity,ionic conductivity and catalytic activity.In addition,perovskite and electrolyte materials with high ionic conductivity are combined,while the three-phase-boundary heterostructured composites have a synergistic optimization effect on the electrochemical reaction.Fuel electrode(La_(0.75)Sr_(0.25))_(0.95)Cr_(0.5)Mn_(0.5)O_(3−δ)(LSCM)which has promising redox stability was applied and the LSCM-SDC nano-interface was constructed by impregnating Ce_(0.8)Sm_(0.2)O_(2−δ)(SDC).It is found that the nanocomposite electrode has higher surface exchange rate and electrochemical reactivity than pure LSCM electrode in both cell and electrolysis modes.

关 键 词：碳中和 可逆固体氧化物电池 LSCM 纳米复相电极 浸渍 

分 类 号：TQ174.75[化学工程—陶瓷工业]