Assessment of LaM0.25Mn0.75O3-delta (M = Fe, Co, Ni, Cu) as promising cathode materials for intermediate-temperature solid oxide fuel cells

	Assessment of LaM0.25Mn0.75O3-delta (M = Fe, Co, Ni, Cu) as promising cathode materials for intermediate-temperature solid oxide fuel cells
	Meng,Junling; Yuan,Na; Liu,Xiaojuan; Yao,Chuanggang; Meng,Fanzhi; Niu,Xiaodong; Wu,Xiaojie; Meng,Jian
刊名	electrochimica acta
	2015
卷号	169 页码:264-275
关键词	BRILLOUIN-ZONE INTEGRATIONS AUGMENTED-WAVE METHOD PEROVSKITES SURFACE STABILITY EXPANSION BEHAVIOR LACOO3 ANODE SOFCS
通讯作者	liu,xj
英文摘要	a series of novel perovskites lam0.25mn0.75o3 delta (m = fe, co, ni, cu) are considered as promising cathode materials for intermediate-temperature solid oxide fuel cells (it-sofcs). polycrystalline powders of lam0.25mn0.75o3 delta are synthesized by a modified pechini method. powder x-ray rietveld refinements reveal that lam0.25mn0.75o3 delta series are in the orthorhombic perovskite structure within pnma (no. 62) space group at room temperature. in situ high temperature x-ray diffractions indicate the existence of phase transformation from the orthorhombic pnma phase to a higher symmetrical rhombohedral phase at elevated temperatures without any second phase formation for all these compounds. multivalent states of m (fe, co, ni and cu) and mn ions are testified by x-ray photoelectron spectroscopy measurement (xps). the electrical conductivity are measured to be 39.6, 85.3 and 48.1, 99.4 s cm (1) for m = fe, co, ni and cu, respectively and the corresponding impedance are 0.131, 0.106, 0.107 and 0.0634 omega cm(2) at 850 degrees c. among these compounds, lam0.25mn0.75o3 delta exhibits the highest electrical conductivity and the lowest electrode polarization resistances, which is consistent with its calculated smallest band gap and lowest oxygen vacancy formation energy. moreover, they all exhibit excellent chemical compatibility with prototypical electrolyte ce0.8sm0.2o2 delta (sdc). while the overall electrochemical properties of lam0.25mn0.75o3 delta (m = fe, co, ni) are high enough to fulfill the practical applications. thus, these lam0.25mn0.75o3 delta (m = fe, co, ni, cu) compounds are potential cathode materials for it-sofcs. (c) 2015 elsevier ltd. all rights reserved.
收录类别	SCI
语种	英语
WOS记录号	WOS:000355007400034
公开日期	2016-05-31
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/65135]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Meng,Junling,Yuan,Na,Liu,Xiaojuan,et al. Assessment of LaM0.25Mn0.75O3-delta (M = Fe, Co, Ni, Cu) as promising cathode materials for intermediate-temperature solid oxide fuel cells[J]. electrochimica acta,2015,169:264-275.
APA	Meng,Junling.,Yuan,Na.,Liu,Xiaojuan.,Yao,Chuanggang.,Meng,Fanzhi.,...&Meng,Jian.(2015).Assessment of LaM0.25Mn0.75O3-delta (M = Fe, Co, Ni, Cu) as promising cathode materials for intermediate-temperature solid oxide fuel cells.electrochimica acta,169,264-275.
MLA	Meng,Junling,et al."Assessment of LaM0.25Mn0.75O3-delta (M = Fe, Co, Ni, Cu) as promising cathode materials for intermediate-temperature solid oxide fuel cells".electrochimica acta 169(2015):264-275.