A crucial challenge in the commercialization of Ni-based materials as the anode of solid oxide fuel cell is the fast voltage drop due to carbon deposition and structural degradation during cell operation. Herein, Sn-doped Ce_0.8Sm_0.2O_2-δ (SDC) supported Sn-Ni alloy anode is rationally designed and prepared, via a simple and convenient dual-modification strategy. The substitution of Sn of Ce in the oxide phase enhances the mobility of lattice oxygen in SDC. Meanwhile, Sn exsolves partially from the oxide phase and forms Ni₃Sn and Ni₃Sn₂ intermetallic compounds with Ni after reduction. The composite anode thus formed achieves unprecedent activity in the electrochemical oxidation of H₂ and CH₃OH. The maximum power densities of a cell supported by 500 μm-thick Ce_0.8Sm_0.2O_2-δ-carbonate electrolyte layer with the Ni-Ce_0.7Sn_0.1Sm_0.2O_2-δ (Ni-SSn₁₀DC) anode reach 1.99 and 2.11 W cm^-2 at 700 ^oC, respectively for using H₂ and methanol as fuels. The doping of Sn also remarkably enhances the coking resistance of the anode. This work opens a path on the design of high-performance SOFC anode.

镍基材料作为固体氧化物燃料电池阳极的商业化面临的一个关键挑战是电池运行期间由于碳沉积和结构退化导致的快速电压下降。在此，通过简单方便的双改性策略，合理设计和制备了Sn 掺杂的 Ce _0.8 Sm _0.2 O _{2-δ (SDC) 负载的 Sn-Ni 合金负极。}氧化物相中 Ce 的 Sn 取代增强了 SDC 中晶格氧的迁移率。同时，Sn从氧化物相中部分溶出，还原后与Ni形成Ni ₃ Sn和Ni ₃ Sn ₂金属间化合物。由此形成的复合阳极在H的电化学氧化中实现了前所未有的活性₂和 CH ₃ OH。500 μm厚的Ce _0.8 Sm _0.2 O _{2-δ -}碳酸盐电解质层与Ni-Ce _0.7 Sn _0.1 Sm _0.2 O _2-δ (Ni-SSn ₁₀ DC) 负极的电池最大功率密度达到1.99和2.11 W cm ^-2 at 700 ^o C，分别使用H ₂和甲醇作为燃料。Sn的掺杂也显着增强了阳极的抗结焦性。这项工作为高性能 SOFC 阳极的设计开辟了道路。