Electrocatalytic surface nanoionics with strained interfaced and colossal conductivity for enhancing durability and performance of solid oxide fuel cell
Electrocatalytic surface nanoionics with strained interfaced and colossal conductivity for enhancing durability and performance of solid oxide fuel cell
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具有应变界面和巨大电导率的电催化表面纳米离子,可提高固体氧化物燃料电池的耐用性和性能
DOI:
10.1016/j.jpowsour.2021.230715
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发表时间:
2022
影响因子:
9.2
通讯作者:
Song, Xueyan
中科院分区:
文献类型:
--
作者:
Chen, Yun;Romo-De-La-Cruz, Cesar O.;Paredes-Navia, Sergio A.;Liang, Liang;Hinerman, Alec;Prucz, Jacky;Williams, Mark;Song, Xueyan
For an oxygen electrode in solid oxide fuel cells (SOFCs) consisting of mixed electrical and ionic conducting lanthanum strontium cobalt ferrite (LSCF), it degrades due to its low chemical stability and cation surface segregation. To mitigate such degradation, for the first time in the field of SOFCs, we demonstrate a conformal ultra-thin (∼10 nm) coating consisting of subjacent discrete nano-Pt capped with a superjacent conformal CoOxlayer, applied on LSCF/SDC composite electrode, using atomic layer deposition (ALD). The coating layer reduces the cell series resistance by up to 40%, presents extraordinary stability with an intact morphology after 816 h operation. The superjacent CoOxsurface nanoionics consists of randomly orientated but single-layered nanograins, with high-density intergranular and surface grain boundaries serving as the electrochemical reaction sites and facilitating mass transport. The ALD coating turns the original perovskite surface that is vulnerable to cation segregation and degradation into an embedded strained interface phase with enormous conductivity. The coating layer appears to suppress Sr outward diffusion and confines a 2 nm Sr-enriched interface layer between the coating layer and the LSCF backbone. The conductivity of the coating layer is estimated to be ∼1.27 × 104S/cm and two orders magnitude higher than that of LSCF.
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影响因子:
3.9
作者:
M. Verkerk;W. Hammink;A. Burggraaf
通讯作者:
A. Burggraaf
DOI:
10.1051/jcp/1973700923
发表时间:
1973
期刊:
Journal of Computers
影响因子:
--
作者:
Edmond Schouler;M. Kleitz;C. Déportes
通讯作者:
C. Déportes
DOI:
10.1002/pssa.200673780
发表时间:
2007
期刊:
physica status solidi (a)
影响因子:
--
作者:
Alan V. Chadwick
通讯作者:
Alan V. Chadwick
DOI:
10.1051/jcp/1973701309
发表时间:
1973
期刊:
physica status solidi (a)
影响因子:
--
作者:
Edmond Schouler;Georges Giroud;M. Kleitz
通讯作者:
M. Kleitz
影响因子:
6.6
作者:
H. Okamoto;G. Kawamura;T. Kudo
通讯作者:
H. Okamoto;G. Kawamura;T. Kudo