水热原位生长制备致密氧化铈基固体氧化物燃料电池隔离层  

In-situ Hydrothermal Growth of Dense Ceria Based Barrier Layer for Solid Oxide Fuel Cells

作　　者：赵浩宇 吕秋秋 程丽亚 吴升龙 朱腾龙 钟秦[1] ZHAO Haoyu;LYU Qiuqiu;CHENG Liya;WU Shenglong;ZHU Tenglong;ZHONG Qin(School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学化学与化工学院,南京210094

出　　处：《硅酸盐学报》2023年第4期1000-1006,共7页Journal of The Chinese Ceramic Society

基　　金：江苏省碳达峰碳中和科技创新专项(BE2022029);中央高校基本科研业务费专项(30920041108)。

摘　　要：面向高性能固体氧化物燃料电池(SOFC)低成本制备及长寿命运行需求,提出了一种致密氧化铈基隔离层的制备方法.将阳极支撑半电池的Y_(2)O_(3)稳定ZrO_(2)(YSZ)电解质浸没于硝酸钆和硝酸铈水溶液中,并在180℃水热条件下处理36 h,获得了原位生长的致密Gd2O3掺杂CeO_(2)(GDC)薄膜;进一步将其与La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3–δ)阴极在1075℃共烧结,得到阳极支撑SOFC单电池.结果表明,水热原位生长制备的GDC隔离层连续且致密,组成约为Gd0.044Ce0.956O_(2)–δ,厚度约为0.23μm;阳极支撑单电池在750℃的欧姆阻抗约为0.101Ω·cm2,相较于传统丝网印刷GDC隔离层单电池降低了约38%,在室温加湿氢气燃料下的最大功率密度达到了约1.038 W/cm2,表现出较好的长期运行稳定性.报道的水热原位生长法能满足多构型、多尺寸SOFC致密隔离层薄膜的低成本规模化制备,具有工业应用前景.A novel fabrication method of dense ceria-based barrier layer was proposed to fulfil the low-cost fabrication and long-term operation of solid oxide fuel cell(SOFC).A Y2O3 stabilized ZrO2(YSZ)electrolyte of anode supported half-cell was immersed in a solution of gadolinium nitrate and cerium nitrate,and treated at 180℃for 36 h,then yielding a dense Gd2O3 doped CeO2(GDC)thin film.The GDC thin film was co-sintered with screen printed Lao.6Sro.4Coo.2Feo.8O3-s cathode at 1075 C,thus obtaining an anode supported single cell.The results show that the hydrothermal grown GDC barrier layer is continuous and dense,with a chemical composition of Gd_(0.044)Ce_(0.956)O2-s and a thickness of 0.23μm.The Ohmic resistance of anode supported a single cell at 750℃is 0.101 Q-cm^(2),which is 38%lower than that of the cell with a conventional screen printed GDC barrier layer.The maximum power density using a wet hydrogen fuel reaches 1.038 W/cm^(2)with a decent long-term operation durability.This hydrothermal in-situ growth method can satisfy the low-cost and large-scale fabrication of dense and thin-film barrier layers for SOFC with multi-configurations and dimensions,showing a promising application prospect.

关 键 词：固体氧化物燃料电池 隔离层 氧化钆掺杂氧化铈 水热原位生长 陶瓷薄膜 

分 类 号：TQ174.6[化学工程—陶瓷工业]