小冲杆试验评价固体氧化物燃料电池NiO-YSZ阳极机械强度  

Evaluation of Mechanical Strength of NiO-YSZ Anode in Solid Oxide Fuel Cell Based on Small Punch Test

作　　者：宋明 胡佳旺 蒋文春[2] 张玉财[2] 钮瑞艳[1] 仝佳佳 SONG Ming;HU Jiawang;JIANG Wenchun;ZHANG Yucai;NIU Ruiyan;TONG Jiajia(College of Pipeline and Civil Engineering,China University of Petroleum(East China),Qingdao 266580,Shandong,China;College of New Energy,China University of Petroleum(East China),Qingdao 266580,Shandong,China)

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东青岛266580 [2]中国石油大学(华东)新能源学院,山东青岛266580

出　　处：《硅酸盐学报》2024年第1期9-18,共10页Journal of The Chinese Ceramic Society

基　　金：国家重点研发计划(2021YFB4001501);中央高校基本科研业务费专项基金(23CX03009A);国家自然科学基金(52275167,51805543)。

摘　　要：目前我国在固体氧化物燃料电池(SOFC)核心部件阳极-电解质-阴极组件(PEN)陶瓷材料强度评价方法及相关标准方面仍为空白,亟待制定切实可行的测试方法及进行系统性的研究。本工作以平板式阳极支撑SOFC的氧化镍-氧化钇稳定氧化锆(NiO-YSZ)陶瓷材料为研究对象,通过小冲杆试验、力学建模与分析,结合逆向有限元法、试样断口微观分析及Weibull失效概率模型,得到了脆性NiO-YSZ陶瓷材料的弹性模量、特征强度和Weibull模量等力学性能参数。提出了基于小冲杆微试样试验的平板式SOFC关键构件NiO-YSZ机械强度的评价方法。为PEN陶瓷材料的强度表征与微观结构优化提供了测试手段与数据支持。Introduction Solid oxide fuel cells(SOFCs)are an efficient all solid-state power generation device and an important choice for achieving the energy goals.The existing shortcomings like low high-temperature strength,structural reliability,and short service life of SOFCs restrict the commercialization of SOFCs.The core component of SOFC,i.e.,the positive-electrolyte-negative(PEN)multilayer composite ceramic electrode plate that works in a redox environment for a long time and bears the cyclic thermal stress caused by multiple starts and stops of the SOFC stack should have a good mechanical strength.The common anode material for SOFC is nickel oxide-yttria-stabilized zirconia(NiO-YSZ)porous ceramic.The NiO-YSZ anode has some problems such as alternating high and low temperature redox,carbon deposition,impurity poisoning,and Ni particle growth during operation,thus leading to the deterioration of the mechanical properties of the anode.It is thus of great significance to evaluate the mechanical properties of the NiO-YSZ anode for SOFCs and evolute the degradation over service time.However,the excessive clamping force can lead to the fragmentation of the entire specimen due to the thin thickness of NiO-YSZ anode and the brittleness of the material.It is difficult for conventional tensile tests to achieve the evaluation of the mechanical strength of the NiO-YSZ anode and PENcomponents.The small punch test(SPT)is a testing technique that uses micro-sized specimens to obtain the mechanical strength of materials without the need to clamp the specimens.This paper focused on the homogeneous NiO-YSZ anode material of planar SOFC and conducted multiple sets of SPTs.In addition,a method was also proposed to evaluate the mechanical strength of anode NiO-YSZ ceramic component of planar SOFCs using SPT.Methods The initial experimental material was planar anode-supported SOFC multilayer PEN plate,which did not yet put into service and prepared by a tape-casting method.The anode,electrolyte,and cathode materials were NiO-YSZ,YSZ,and

关 键 词：固体氧化物燃料电池 氧化镍-氧化钇稳定氧化锆阳极 小冲杆试验 机械强度 WEIBULL分布 

分 类 号：TM911.42[电气工程—电力电子与电力传动]