A performance study of hybrid direct carbon fuel cells: Impact of anode microstructure

作者：Lee Ji Yong; Song Rak Hyun; Lee Seung Bok; Lim Tak Hyoung; Park Seok Joo; Shul Yong Gun; Lee Jong Won^*

来源：International Journal of Hydrogen Energy, 2014, 39(22): 11749-11755.

DOI：10.1016/j.ijhydene.2014.05.145

• Direct carbon fuel cell
• Solid oxide electrolyte
• Molten carbonate
• Anode microstructure
• Carbon oxidation

Direct carbon fuel cells (DCFCs) have recently attracted great interest because they could provide a considerably more efficient means of power generation in comparison with conventional coal-fired power plants. Among various types of DCFCs under development, a hybrid system offers the combined advantages of solid oxide and molten carbonate electrolytes; however, there is a significant technical challenge in terms of power capability. Here, we report an experimental study demonstrating how anode microstructure influences the power-generating characteristics of hybrid DCFCs. The anode microstructure (pore volume and surface area) is modified by using poly(methyl methacrylate) (PMMA) pore-formers. Polarization studies indicate that cell performance is strongly dependent on the anode surface area rather than on the pore volume. The incorporation of PMMA-derived pores into the anode leads to improved power capability at typical operating temperatures, which is attributed to an enlarged active zone for electrochemical CO oxidation.

• 出版日期2014-7-24