Zhu Liangzhu, Cadigan Chris, Duan Chuancheng, Huang Jake, Bian Liuzhen, Le Long, Hernandez Carolina H, Avance Victoria, O'Hayre Ryan, Sullivan Neal P
Metallurgical and Materials Engineering Department, Colorado School of Mines, Golden, CO, USA.
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China.
Commun Chem. 2021 Aug 17;4(1):121. doi: 10.1038/s42004-021-00559-2.
The intermediate operating temperatures (400-600 °C) of reversible protonic ceramic fuel cells (RePCFC) permit the potential use of ammonia as a carbon-neutral high energy density fuel and energy storage medium. Here we show fabrication of anode-supported RePCFC with an ultra-dense (100%) and thin (4 μm) protonic ceramic electrolyte layer. When coupled to a novel Ru-(BaO)(CaO)(AlO) (Ru-B2CA) reversible ammonia catalyst, maximum fuel-cell power generation reaches 877 mW cm at 650 °C under ammonia fuel. We report relatively stable operation at 600 °C for up to 1250 h under ammonia fuel. In fuel production mode, ammonia rates exceed 1.2 × 10 NH mol cm sat ambient pressure with H from electrolysis only, and 2.1 × 10 mol NH cm s at 12.5 bar with H from both electrolysis and simulated recycling gas.
可逆质子陶瓷燃料电池（RePCFC）的中间工作温度（约400-600°C）使得氨有潜力作为一种碳中性的高能量密度燃料和储能介质。在此，我们展示了阳极支撑的RePCFC的制备，其具有超致密（约100%）且薄（4μm）的质子陶瓷电解质层。当与新型Ru-(BaO)(CaO)(AlO)（Ru-B2CA）可逆氨催化剂耦合时，在650°C的氨燃料条件下，燃料电池的最大发电功率达到877 mW/cm²。我们报告了在600°C下以氨为燃料时长达1250小时的相对稳定运行。在燃料生产模式下，仅通过电解产生的氢气，在环境压力下氨生成速率超过1.2×10⁻⁵ NH₃ mol/cm²·s，而在12.5 bar压力下，当同时使用电解产生的氢气和模拟循环气体时，氨生成速率为2.1×10⁻⁴ mol NH₃/cm²·s。
