摘要
以原位析出纳米Co–Fe颗粒的La_(0.4)Sr_(0.6)Co_(0.2)Fe_(0.7)Nb_(0.1)O_(3–δ)(LSCFN)钙钛矿为阳极,考察了直接使用CO–CO_(2)燃料时的阳极结构演变、单电池电化学性能和稳定性。结果表明:在CO燃料中,ABO_(3)钙钛矿结构LSCFN转变为A_(2)BO_(4)层状钙钛矿结构;在CO中引入少量CO_(2)后,LSCFN则以单钙钛矿结构为主,并有效抑制了碳沉积。单电池在CO燃料下的最大功率密度可达0.6 W/cm^(2)(850℃),并在n(CO):n(CO_(2))=5:1(摩尔比)燃料下运行超过100 h。
La_(0.4)Sr_(0.6)Co_(0.2)Fe_(0.7)Nb_(0.1)O_(3–δ)(LSCFN) anode structure,electrochemical performance and operating stability are characterized using CO–CO_(2) mixed as fuel.Results show that,the ABO_(3) perovskite structure of LSCFN is reduced to A_(2)BO_(4)Ruddlesden-popper structure in CO fuel.While,the addition of CO_(2) can shift the structure of LSCFN back to single perovskite,and inhibit coking effectively.The maximum output power density of single cell using pure CO fuel is 0.6 W/cm^(2) at 850℃.And the cell operates for more than 100 hours when using CO:CO_(2) mixed gas as fuel in molar ratio of 5:1.
作者
陈晓阳
朱腾龙
钟秦
韩敏芳
CHEN Xiaoyang;ZHU Tenglong;ZHONG Qin;HAN Minfang(School of Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Department of Energy and Power Engineering,State Key Laboratory of Power Systems,Tsinghua University,Beijing 100084,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2021年第1期14-19,共6页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(51702163)
江苏省重点研发计划(BE2017098)
电力系统国家重点实验室开放课题(SKLD20KM23)。
关键词
固体氧化物燃料电池
钙钛矿阳极
碳基燃料
稳定性
电化学性能
solid oxide fuel cell
perovskite anode
carbon-based fuel
durability
electrochemical performance
