直接碳固体氧化物燃料电池阳极材料的研究进展  

Research Progress of the Anode Materials for Direct Carbon Solid Oxide Fuel Cells

作　　者：张英杰[1,2] 吴昊 曾晓苑 李雪[1,2] 董鹏[1,2] 肖杰[1,2] ZHANG Yingjie;WU Hao;ZENG Xiaoyuan;LI Xue;DONG Peng;XIAO Jie(National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology,Key Laboratory of Advanced Battery Mate-rials of Yunnan Province,Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China;Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学材料科学与工程学院,锂离子电池及材料制备技术国家地方联合工程实验室,云南省先进电池材料重点实验室(筹),昆明650093 [2]昆明理工大学冶金与能源工程学院,昆明650093

出　　处：《材料导报》2020年第3期90-98,共9页Materials Reports

基　　金：国家自然科学基金(51764029;51604132);云南省应用基础研究计划(2015FD007;2017FB085)~~

摘　　要：如今,世界能源与环境问题日益严峻,其中煤炭、石油等化石燃料的粗放利用是一个很重要的原因,开发一种高效、清洁的煤炭利用技术已经迫在眉睫。直接碳固体氧化物燃料电池(Direct carbon solid oxide fuel cell,DC-SOFC)作为全固态的能量转换装置,可以直接采用固体碳作为燃料,将化学能直接转化为电能,理论上其能量转化效率接近100%。这种全固态的结构可以有效地避免液态金属阳极DCFC和复合电解质型DCFC电解液泄漏、腐蚀和由空气中的二氧化碳引起的电池性能衰减等问题。随着SOFC电池技术的迅速发展,DC-SOFC技术受到了越来越多研究者的关注,并有望成为新一代清洁能源技术。然而,由于采用固体电解质和固体碳燃料,DC-SOFC阳极反应过程复杂且影响因素众多,不同的阳极材料在性能上有着不同的表现。对此,国内外研究者为解释其阳极反应机理做了大量的工作,且不断尝试将各种新型材料用作DC-SOFC的阳极,并取得了一定的成果,对其阳极反应机理做出了合理的推断,在充分发挥DC-SOFC安全性和稳定性的同时大幅提升了其输出性能。目前,对于DC-SOFC的阳极机理,根据电池中碳燃料引入形式的不同,产生了两种不同的理论,且均有合理的实验数据支撑。而已经报道的DC-SOFC阳极材料除了最早的贵金属Pt阳极材料以外,主要有以Ni-YSZ为代表的Ni基复合金属陶瓷阳极材料、以Cu-Ni-YSZ为代表的Cu基复合金属陶瓷阳极材料、以Ag-GDC为代表的Ag基复合金属陶瓷阳极材料及以LST或LSCT为代表的混合离子和电子导体阳极材料(MIECs)。大量研究表明,在金属陶瓷阳极中加入Fe、Sn等具有催化功能的元素能有效增加电池的输出功率,提高燃料的利用效率。这些材料虽然在输出性能上表现不一,但是均存在各自的优势,为DC-SOFC的研究提供了不同的思路。此外,以现有材料为基础,对阳极结构进行优化,Nowadays,the global energy crisis and environment pollution become increasingly severer,among which the extensive utilization of fossil fuels such as coal and petroleum is a critical reason.Hence it is urgent to develop an efficient and clean coal utilization technology.Direct carbon solid oxide fuel cell(DC-SOFC),as an all-solid-state energy conversion device,can directly use solid carbon as a fuel,converting the chemical energy into electricity.Theoretically,its energy conversion efficiency is close to 100%,which has unique advantages in the clean use of coal,such as without the use of any liquid metal or feeding gas as medium.This all-solid-state structure can effectively avoid several problems,such as electrolyte leakage,corrosion and performance degradation due to carbon dioxide in the air,which may occur in liquid metal anode DCFC and composite-electrolyte DCFC.With the rapid development of SOFC technology,DC-SOFC has attracted more and more researchers’attentions and is expected to become a new generation of clean energy technology.Due to the use of solid electrolytes and solid carbon materials,the anodic reaction process is complex and there are many influencing factors.To address these issues,researchers all around the world have done a lot of work to unravel the anode reaction mechanism,and constantly try to develop various novel anode materials of DC-SOFC.Some acceptable results had been obtained,for example,some reasonable anode reac-tion mechanisms had been proposed.At present,two different mechanisms of DC-SOFC anode reaction have appeared according to the different forms of carbon fuel feeding into the cell.Besides the earliest noble metal of Pt anodes,the reported anode materials of DC-SOFC mainly includes Ni-based composite cermet,Cu-based composite cermet,Agbased composite cermet and mixed ionic and electronic conductors(MIECs),which are represented by Ni-YSZ,Cu-Ni-YSZ,Ag-GDC and LST,respectively.A large number of studies have shown that the addition of Fe,Sn and other elements with catalytic

关 键 词：直接碳固体氧化物燃料电池 阳极材料 复合金属陶瓷材料 混合离子和电子导体 

分 类 号：O646[理学—物理化学]