| 天然气和甲烷固体氧化物燃料电池中的Ni-LCCM-GDC阳极性能研究 |
| Performance of the Ni-LCCM-GDC Anode for Solid Oxide Fuel Cells in Natural Gas and Methane |
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| 摘要: 采用溶胶-凝胶法合成了纳米粉体La1-xCexCr0.5Mn0.5O3-δ(x=0.05，0.10，0.15，0.20)(LCCM)，并采用共压-共烧结法制备了以复合阳极Ni-La0.9Ce0.1Cr0.5Mn0.5O3-δ-Ce0.8Gd0.2O2-δ(GDC)为支撑、GDC为电解质、La0.8Sr0.2Co0.8Fe0.2O3-δ(LSCF)-GDC为复合阴极的单电池。利用XRD和SEM等方法对阳极材料进行了晶相结构、化学相容性、微观形貌分析。在500~750 ℃范围内，分别以湿天然气(3% H2O)和甲烷为燃料气，氧气为氧化气测试了单电池的电化学性能，同时检测了以甲烷为燃料气的阳极尾气组成。结果表明：复合阳极材料具有良好的化学相容性；阳极和阴极具有较好的孔隙结构。以天然气和甲烷为燃料气的单电池在700 ℃时最大电流密度分别为131.96 mA·cm-2，162.36 mA·cm-2； 最大比功率分别为28.61 mW·cm-2，31.03 mW·cm-2。在500~750 ℃范围内阳极尾气中均检测出CO，CO2，在700 ℃时CO，CO2含量达到最大值，分别为2.39254%，6.20891%。 |
| 关键词: 固体氧化物燃料电池 复合阳极 阳极性能 阳极尾气 |
| 基金项目: |
| Abstract: The article carried out the Sol-Gel Method to synthesize La1-xCexCr0.5Mn0.5O3-δ(x=0.05, 0.10, 0.15, 0.20) (LCCM) nanopowders. The Ni-La0.9Ce0.1Cr0.5Mn0.5O3-δ-Ce0.8Gd0.2O2-δ(GDC) anode-supported cells were fabricated by dry-pressing process using GDC as electrolyte and La0.8Sr0.2Co0.8Fe0.2O3-δ(LSCF)-GDC as cathode. The crystal forms, chemical stability and microstructures were investigated by XRD and SEM. The electrical properties of single cell were tested by using humidified natural gas (3% H2O) and methane as fuel respectively, oxygen as oxidant in the temperature range from 500 ℃ to 750 ℃. We also detected the composition of anode tail gas by using methane. The results show that the composite anode have good chemical compatibility, anode and cathode have the better pore microstructure. At 700 ℃, the maximum power density is 28.61 mW·cm-2 for humidified nature gas, 31.03 mW·cm-2 for methane. Carbon monoxide(CO) and carbon dioxide (CO2) were detected in the anode tail gas at 500~750 ℃. The maximum contents of CO and CO2 are 2.392 54%, 6.208 91% at 700 ℃, respectively. |
| Keywords: SOFCs composite anode electrical property anode tail gas |
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| 方 亮,刘瑞泉.天然气和甲烷固体氧化物燃料电池中的Ni-LCCM-GDC阳极性能研究[J].无机化学学报,2010,26(5):839-845. |
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