Plasma sprayed coatings for low-temperature SOFC and high temperature effects on Lix(Ni, Co)yO2 catalyst layers. (12th July 2018)

• Record Type: Journal Article
• Authors: Yuan, Kang; Yu, Yueguang; Wu, Yan; Ji, Xiaojuan; Xu, Zhenyuan; Shen, Jie
• Is Part Of: International journal of hydrogen energy. Volume 43:Number 28(2018)
• Page Start: 12782
• Page End: 12788
• Publication Date: 2018-07-12
• Subjects: Low-pressure plasma spray -- Coating -- Low-temperature SOFCs -- Lix(Ni, Co)yO2 catalyst layer; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.03.215
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In this paper, a new plasma spray technology working in low pressure condition has been successfully applied to deposit Lix (Ni, Co)y O2 catalyst/electrode layers for low-temperature solid oxide fuel cells (LT-SOFCs). The low pressure induced distinctive phenomena were illustrated for presenting the characteristics and advances of such coating technique. Micro-nano crystalline microstructure was generated on the plasma sprayed coatings simultaneously with phase transformation taking place. To study the effect of high temperature on such catalyst material, sintering experiments were carried out at 600–1000 °C. The results show that the ratio of x/y decreased when increasing temperature and sintering time because of the degradation of Li from Lix (Ni, Co)y O2 phase. The catalytic property and stability of the Lix (Ni, Co)y O2 at various temperatures were also discussed. Highlights: Low-pressure plasma spray technology is used to make coating for LT-SOFC. The advances of the coating technology were explained with low pressure effects. Phase transformation occurs in NCAL coatings due to high enthalpy by plasma. The high temperature effects are also demonstrated by sintering tests. The durability of NCAL catalyst is discussed based on phase stability.