原位析出制备高性能中温固体氧化物燃料电池阳极材料Sm_(0.20)Ni_(x)Ce_(0.80-x)O_(2-δ)

In-situ Fabrication of Sm_(0.20)Ni_(x)Ce_(0.80-x)O_(2-δ) Anode Materials for High-Performance Intermediate Temperatures Solid Oxide Fuel Cell

金属纳米颗粒的原位析出提供了高含量和均匀分布的金属纳米催化剂,并且无需复杂的合成过程。为在固体氧化物燃料电池(SOFC)的实际电极中实施这一策略,本工作用Pechini法制备了一系列不同含量Ni掺杂的Sm_(0.20)Ni_(x)Ce_(0.80-x)O_(2-δ)(SNDC)阳极材料,并通过还原处理形成具有Ni纳米颗粒出溶的SOFC阳极材料。采用SNDC15为阳极时,电解质支撑的单电池输出性能最高,在700℃以氢气和甲醇为燃料时单电池最大功率密度分别为1.26 W/cm^(2)和1.48 W/cm^(2)。此外,小尺寸的Ni颗粒与氧化物载体之间有强相互作用,有效抑制了积碳的生长。单电池在700℃甲醇为燃料时能稳定运行10 h以上。

In-situ exsolution of metal nanoparticles affords a high content and uniform distribution of metal nanocatalysts without complex synthetic processes.To implement this strategy in practical electrodes for solid oxide fuel cells(SOFC),a series of Ni doped Sm_(0.20)Ni_(x)Ce_(0.80-x)O_(2-δ)(SNDC)anode materials were fabricated by the Pechini method.The in-situ exsolved Ni nanoparticles are uniformly distributed on the surface of the SNDC substrate after reduction.The maximum cell performance is achieved with SNDC15as the anode of electrolyte supported single cell,and the maximum power density of the single cell is 1.26 W/cm^(2)and 1.48 W/cm^(2)when fed with hydrogen and methanol at 700℃,respectively.Moreover,a strong interaction between Ni nanoparticles and the oxide support effectively inhibits the growth of carbon deposition.The single cell with methanol fuel exhibits a stable power output at 700℃for 10 h.