碳基燃料SOFC系統(tǒng)構建及成果集成演示研究報告

杜曉佳 孫再洪

摘 要：該研究目標就是利用其他課題的基礎研究成果，開發(fā)電池堆材料，設計安裝電池堆，并進行電池堆集成演示，為驗證其他課題研究成果提供平臺，并為實現(xiàn)SOFC技術發(fā)展的國家目標做出貢獻。研究內(nèi)容包括：研究適合一體化SOFC的新型密封材料體系及封接工藝，獲得密封材料組成、配方及封接方式；基于一體化SOFC單電池結構及其組合方式，設計并優(yōu)化連接體結構；建立電池堆數(shù)學模型和實驗驗證方法，設計電池堆結構提供依據(jù)；建立和優(yōu)化電池堆的集成工藝，組裝電池堆。取得的初步成果：（1）以12G封料為基礎的玻璃和玻璃-氧化鋯復合封接材料取得了初步成功并已用于電池和電堆測試；（2）設計了第一代雙極板電堆連接體，取得了連接體的設計經(jīng)驗。在此基礎上設計出了先進的以薄板結構為特征的第二代電堆連接體，為今后功率的擴容和產(chǎn)業(yè)化打下了基礎；（3）建立了電池堆數(shù)學模型，創(chuàng)建了電場、流場、溫場耦合均勻性評價實驗方案，為電池堆設計提供了關鍵參數(shù)；（4）發(fā)了第一代電堆集成工藝、檢測系統(tǒng)和電堆測量技術。在此基礎上結合第二代連接體設計的改進，設計了第二代電堆集成裝置和安裝程序；第二代電堆設計克服了第一代電堆設計中的關鍵障礙，為今后降低電堆成本、擴大容量、增強重復性和可靠性打下了基礎。與國內(nèi)外同類研究工作相比的創(chuàng)新性：開發(fā)的BiBaSi系玻璃-ZrO2復合密封材料既保持了玻璃高密封效率，又克服了玻璃密封件厚度難以掌控的缺點。在連接體設計中，第二代連接件設計采用了薄板結構，內(nèi)置式氣體進出氣柜，接近了國際設計水平。在電池堆集成安裝方面，第二代電堆的集成安裝設備及工藝簡潔流暢，重復性好，為以后擴大生產(chǎn)創(chuàng)造了條件。

關鍵詞：SOFC 碳基燃料 連接件 密封材料 電池堆

Abstract：The objectives of Task VI include development of new stack materials， design， assembling and demonstration of SOFC stacks by use of research results achieved by rest tasks of this 973 project. Achievement of these objectives， especially the development of SOFC stacks will provide other task teams with a reliable platform to evaluate and demonstrate their research results， and furthermore， make contributions to national strategic objectives on SOFC technology development... To realize the objectives， the work scope of task VI was set as bellow：Development of new gasket materials and sealing technology for PEN co-structured SOFCs （CS-SOFCs）， including material compositions， processing and application technology；Design and optimization of interconnect suitable for CS- SOFCs structure and assembling；Developing stack modeling and related experimental evaluation methods， providing parameters for stack designs.；Establishing and optimizing stack integration technology and assembling stacks for demonstration. Through the first two-year efforts made by task leader， Suzhou Huatsing Jingkun New Energy Technology Corporation， Ltd. （HSNETC）， and its subcontractor， China University of Mining and technology （Beijing），all the works planed for the period were completed and the objectives were achieved. In details， the major achievements are as below：（1）Developed 12G-based glass and glass-zirconia composite sealing materials which were successfully used for single cell and SOFC stack testing；（2）Designed the first generation of interconnect with combined dual （air and fuel） flowfields structure. Based on the gained experiments， secondary interconnect was developed with thin stainless steels， which paved a way for future development of high power SOFC stacks， systems and commercialization.（3）Created mathematical stack modeling and established evaluation methods，which provided key parameters for stack designs.（4）Developed first generation technologies for stack assembling， examination and testing. Furthermore， secondary generation of stack assembling and evaluation technology was developed based on secondary generation of thin interconnect structure.The latest secondary stack design featured with thin stainless steel interconnects eliminated key technology obstacles in the first generation of stack design.Based on the achievements.gained in last two years，Task VI team are at good shape to accelerate SOFC cell， stack and system technology development.

Key Words：SOFC；Coal-based fuels；Interconnect；Sealing material；Stack

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