A strategy of tailoring Ba₃Ca_1.18Nb_1.82O_9-δ (BCN) is proposed, aiming to improve the sinterability and conductivity of BCN material for fuel cell applications. The new Ba₃Ca_1.18Nb_1.77Ni_0.05O_9-δ (BCNNi) material shows a significant improvement in sinterability compared with BCN, leading to a high densification for BCNNi after sintering at as low as 1400 °C. In addition, the BCNNi exhibits a conductivity of 4.59 × 10⁻³ S cm⁻¹ at 700 °C that is not only higher than that for BCN which only reaches 3.45 × 10⁻³ S cm⁻¹ at the same temperature but also shows a significant improvement compared with that for BCN-based materials in literature reports. As a result, the cell with the BCNNi electrolyte shows a peak power density of 84 mW cm⁻² at 700 °C which is also one of the largest ever reported for this type of cells. Further electrochemical studies indicate that the high conductivity of BCNNi electrolyte membrane benefits the fuel cell performance.

提出了一种调整Ba ₃ Ca _1.18 Nb _1.82 O _{9- δ}（BCN）的策略，旨在提高燃料电池应用中BCN材料的烧结性和电导率。与BCN相比，新型的Ba ₃ Ca _1.18 Nb _1.77 Ni _0.05 O _{9- δ}（BCNNi）材料显示出显着的烧结性提高，从而导致在低至1400°C的烧结温度下BCNNi的高致密化。此外，BCNNi在700°C时的电导率为4.59×10 ^-3  S cm ^-1，不仅高于仅达到3.45×10 ^-3的BCN的电导率在相同的温度下， S cm ^-1与文献报道的BCN基材料相比也显示出显着改善。结果，具有BCNNi电解质的电池在700℃下显示出84mW cm ^-2的峰值功率密度，这也是有史以来针对这种类型的电池所报道的最大功率密度之一。进一步的电化学研究表明，BCNNi电解质膜的高电导率有利于燃料电池的性能。