摘要
平板式固体氧化物燃料电池(Solid oxide fuel cell,SOFC)是一种直接将储存在燃料和氧化剂中的化学能转化为电能的发电装置,具有能量转化效率高、结构紧凑、对环境污染小等优点,成为替代现有石化燃料的最佳选择。SOFC要通过封接防止泄漏,由于其工作温度高,对封接要求苛刻。在高温下,要求封接材料具有良好的化学稳定性、热稳定性、气密性以及绝缘性等,因此密封技术一直是制约其商业化应用的瓶颈问题。钎焊自适应密封是近几年发展起来的一种平板式SOFC密封技术,利用金属箔片钎焊连接电池和金属框架,具有封接强度高、密封性能好、能吸收热应力等优点,具有较好的应用前景。介绍自适应密封的原理、特点和应用,从结构设计、钎焊技术、残余应力等方面的研究进展进行综述,指出该技术存在的问题,并对其今后的发展方向进行预测和展望。
Planar solid oxide fuel cell(SOFC) is a technology which converts chemical energy into electrical energy directly.Its advantages are high efficiency in energy utilization,compact structure and low pollution to environment,etc,which makes it to be the best replacement of fossil energy.In SOFC stack,sealing technology must be used in order to prevent the leakage.But the high working temperature puts forwards a high requirement for the sealing.It needs good chemical and thermal stabilities,tightness and insulation performance.Therefore,the sealing technology is always the hinder of commercial use for SOFC.Bonded compliant seal(BCS) design is a newly developed sealing method for planar SOFC.It uses a thin foil to connect the cell and window frame,and it has a lot advantages including high strength,good sealing performance and absorbing thermal stresses,etc.,which has a broad potential application in the future.This paper introduces its principle,characteristics and application.The research progress is reviewed based on material,brazing technology and residual stress.The problems to be solved are pointed out and the development trend is forecasted.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2012年第2期93-101,共9页
Journal of Mechanical Engineering
基金
国家自然科学基金(51105380)
山东省自然科学基金(ZR2010AQ002)
高等学校博士学科点专项科研基金(20100133120008)
承压系统安全科学教育部重点实验室开放研究基金(2011)资助项目
作者简介
蒋文春,男,1980年出生,博士,副教授。主要研究方向为新能源设备与结构完整性技术。E—mail:jiangwenchun@126.com