阳极
材料科学
二氧化碳重整
化学工程
金属陶瓷
钙钛矿(结构)
氧化物
催化作用
固体氧化物燃料电池
碳纤维
电化学
合成气
冶金
复合数
化学
电极
陶瓷
复合材料
有机化学
物理化学
工程类
作者
Zhengpeng Chen,Mingfei Li,Xin Qian,Jiangbo Dong,Kai Xiong,Di Gan,Mumin Rao,Chuangting Chen,Yunfeng Tian,Yihan Ling
标识
DOI:10.1016/j.jpowsour.2023.233649
摘要
Direct CH4–CO2 solid oxide fuel cells (SOFC) have attracted considerable attention due to their potential for high-efficiency power generation with low environmental impact. However, carbon deposition on Ni-based cermet anodes remains a critical challenge, leading to performance degradation. In this study, we propose a novel approach to address this issue by using a Li-doped perovskite, (La0.75Sr0.25)0.95Li0.1Cr0.5Fe0.4Ni0.1O3-δ (LSLCFN), as an exsolution system and a dry reforming catalyst for SOFCs. The LSLCFN catalyst exhibits enhanced carbon dioxide adsorption capacity, effectively reducing carbon deposition on the anode surface. In addition, the incorporation of Ni–Fe alloy nanoparticles facilitates dissolution in a reducing atmosphere and exhibits remarkable stability in the presence of carbon dioxide. Anode-supported single cells incorporating a LSLCFN-Ce0.9Gd0.1O2–δ(LSLCFN-GDC) composite as the anode active reforming layer exhibit excellent electrochemical performance when operated with both H2 and CH4–CO2 fuels. The peak power densities reach 904.86 and 825.37 mW cm−2 at 800 °C, respectively. Furthermore, the LSLCFN-GDC reforming layer maintains stable performance during the dry reforming of a 50%CH4–50%CO2 fuel mixture for 100 h at 700 °C, with negligible carbon deposition. These results highlight the effectiveness of employing a dry reforming catalyst to enhance CH4–CO2 reforming and optimize electrochemical performance for efficient energy conversion in SOFCs.
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