Nano-structure Effect on Solid State Fuel Cells Cathode Durability

doi:10.3724/SP.J.1077.2013.13132

Abstract

Abstract: Nano-structure could effectively enhance the electro-chemical properties of solid oxide fuel cell cathodes and the output power of single cells, which has a good application prospect. This article mainly focuses on the literatures reported about the long term stability of nano-structure cathode and electrode stability theoretical models. Nano-structure cathode has excellent stability at relatively low temperatures. Isothermal grain growth of nano-particles is self-limited because of the size effect. And nano-structure could significantly reduce the micro-strain induced by the misfit between electrolyte and electrocatalyst, which can keep the two phase in good contact. In addition, nano-structure can also weaken the interface break between two-phase particles in thermal cycle process. The performance of La_0.8Sr_0.2MnO_3-δ and La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ nano-structure cathodes increases by 2.3-78 times compared with traditional composites, and maintains a stable power output in 1000 h.

Key words: solid oxide fuel cells, cathode, nano-structure, durability, review

CLC Number:

TQ174

HONG Tao, WANG Yao, XIA Chang-Rong. Nano-structure Effect on Solid State Fuel Cells Cathode Durability[J]. Journal of Inorganic Materials, 2013, 28(11): 1187-1194.

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