固体氧化物燃料电池力学性能和形变行为研究

doi:10.15541/jim20140573

无机材料学报 ›› 2015, Vol. 30 ›› Issue (6): 633-638.DOI: 10.15541/jim20140573 CSTR: 32189.14.10.15541/jim20140573

固体氧化物燃料电池力学性能和形变行为研究

梁灵江, 李凯, 颜冬, 马奔, 杨佳军, 蒲健, 池波, 李箭

(华中科技大学材料科学与工程学院, 材料成型及模具技术国家重点实验室, 武汉 430074)

收稿日期:2014-11-09 修回日期:2015-01-11 出版日期:2015-06-04 网络出版日期:2015-05-22
作者简介:梁灵江(1990–), 男, 硕士研究生. E-mail: lianglingjiang411@126.com
基金资助:
国家自然科学基金重点项目(U1134001);国家“863”计划(2011AA050702)

Mechanical Property and Deformation Behavior of SOFCs

LIANG Ling-Jiang, LI Kai, YAN Dong, MA Ben, YANG Jia-Jun, PU Jian, CHI Bo, LI Jian

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

Received:2014-11-09 Revised:2015-01-11 Published:2015-06-04 Online:2015-05-22
About author:LIANG Ling-Jiang. E-mail: lianglingjiang411@126.com
Supported by:
National Natural Science Foundation of China(U1134001);National High Technology Research and Development Programof China(“863” Program)(2011AA050702)

摘要/Abstract

摘要：

通过流延成型、丝网印刷和共烧结法成功制备了阳极支撑的平板式固体氧化物燃料电池(SOFCs)。采用陶瓷样品同轴环施力方式和双扭法测试单电池的抗弯强度和断裂韧性分别为156.69 MPa与2.51 MPa•m^1/2。当阳极支撑体由陶瓷(NiO/YSZ)还原为金属陶瓷(Ni/YSZ), 其抗弯强度和断裂韧性分别为104.48 MPa与3.95 MPa•m^1/2。同时电池的弯曲变形测试表明: 单电池经过阳极还原后弯曲变形程度变大, 平整化压力从电池阳极还原前的108 N增加至184 N, 而电池抵抗破裂能力增强。本研究显示, 随着阳极支撑体还原后单电池的断裂韧性显著提高, 将有效减缓其弯曲变形所引起的不利影响, 改善单电池的综合力学性能。

关键词: 固体氧化物燃料电池, 抗弯强度, 断裂韧性, 弯曲变形

Abstract:

Anode-supported planar solid oxide fuel cells (SOFCs) were successfully fabricated by tape casting, screen printing, and co-sintering technologies. Evaluated by the ring-on-ring and double-torsion technique, the flexure strength and fracture toughness of the single-cell are 156.69 MPa and 2.51 MPa•m^1/2, respectively. And after the anode support being reduced from ceramic (NiO/YSZ) to cermet (Ni/YSZ), the flexure strength and fracture toughness change to be 104.48 MPa and 3.95 MPa•m^1/2, respectively. Cell flexural deformation test indicates that with reduction of the anode support, the flexural deformation increases, the force for flattening cell increases (from 108 N to 184 N), and the rupture-resisting performance is enhanced. In conclusion, with notable improvement of cell fracture toughness after anode support reduction, the adverse influence caused by flexural deformation can be effectively mitigated and the comprehensive mechanical property can be improved.

Key words: SOFC, flexure strength, fracture toughness, flexural deformation

中图分类号:

TQ174

梁灵江, 李凯, 颜冬, 马奔, 杨佳军, 蒲健, 池波, 李箭. 固体氧化物燃料电池力学性能和形变行为研究[J]. 无机材料学报, 2015, 30(6): 633-638.

LIANG Ling-Jiang, LI Kai, YAN Dong, MA Ben, YANG Jia-Jun, PU Jian, CHI Bo, LI Jian. Mechanical Property and Deformation Behavior of SOFCs[J]. Journal of Inorganic Materials, 2015, 30(6): 633-638.

图/表 9

图1 SOFC单电池的成型工艺

Fig. 1 Processing diagram for fabrication of anode supported SOFC cells

图2 陶瓷样品双扭测试原理图

Fig. 2 Schematic diagram of double torsion technique of ceramic samples

图3 SOFC单电池形变测量点分布图

Fig. 3 Points distribution diagram for flexural deformation test of SOFC cell

图4 单电池阳极还原前后的XRD图谱

Fig. 4 XRD patterns of the NiO/YSZ anode before and after reduction

图5 单电池还原前后抗弯强度与形变率的关系曲线

Fig. 5 Relationship between flexure strength and deformation of cells before and after anode reduction

图6 单电池阳极还原前后的抗弯强度与断裂韧性变化

Fig. 6 Flexure strength and fracture toughness of cells before and after anode reduction

图7 单电池阳极还原前后断裂截面的微观形貌

Fig. 7 Cross-sectional microstructures of anode supported cells before (a, c) and after (b, d) reduction

图8 单电池表面平整度分布图

Fig. 8 Flatness distribution diagram of cells

图9 单电池压力与形变的对应曲线

Fig. 9 Relationships between force and deformation of cells

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固体氧化物燃料电池力学性能和形变行为研究

Mechanical Property and Deformation Behavior of SOFCs

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