Proton-conducting solid oxide fuel cell (H–SOFC) is more competitive compared to oxygen-conducting SOFC (O–SOFC) due to its lower conductive activation energy, higher fuel conversion rate, and higher Nernst potential. However lack of suitable cathode is hindering its application. A double perovskite Nd(Ba_0·75Ca_0.25)Co_1·5Fe_0·4Ni_0·1O_5+δ (NBCCFN) has been prepared and evaluated as a potential cathode with a peak power density of 882.2 mW cm⁻² for the anode supported single cell with NBCCFN-based composite cathode. NBCCFN exhibits high electrical conductivity, high oxygen vacancies and lower thermal expansion coefficient. Single cell in which the cathode is composited with Gd_0.1Ce_0·9O_2-δ (GDC) presents lower the polarization resistances and higher the peak power densities than that with BaZr_0·1Ce_0·7Y_0.1Yb_0.1O_3-δ (BZCYYb). Our results and corresponding distribution of relaxation time (DRT) analysis suggest that enhancing the oxygen reduction and diffusion processes of cathode is an effective way to improve the performance of H–SOFC.

质子传导性固体氧化物燃料电池（H–SOFC）与氧传导性SOFC（O–SOFC）相比更具竞争力，因为它的传导活化能更低，燃料转化率更高且能斯特势能更高。然而，缺乏合适的阴极阻碍了其应用。甲双钙钛矿的Nd（BA _0·75的Ca _0.25）有限公司_1·5的Fe _0·4的Ni _0·1 ö _{5 +δ}（NBCCFN）已被制备并评价作为具有882.2毫瓦厘米的峰值功率密度的电势的阴极^{- 2}用于基于NBCCFN的复合阴极的阳极支撑单电池。NBCCFN表现出高电导率，高氧空位和较低的热膨胀系数。与BaZr _0·1 Ce _0·7 Y _0.1 Yb _0.1 O ₃相比，阴极与Gd _0.1 Ce _0·9 O2 _-δ（GDC）复合的单电池呈现出更低的极化电阻和更高的峰值功率密度。_-δ（BZCYYb）。我们的结果和相应的弛豫时间分布（DRT）分析表明，增强阴极的氧还原和扩散过程是提高H–SOFC性能的有效方法。