Zhijun, ZhaoZhaoZhijunChen, GuoxingGuoxingChenEscobar Cano, GiamperGiamperEscobar CanoKißling, Patrick A.Patrick A.KißlingPolarz, SebastianSebastianPolarzStölting, OliverOliverStöltingFeldhoff, ArminArminFeldhoffBigall, NadjaNadjaBigallWeidenkaff, AnkeAnkeWeidenkaffBreidenstein, BerndBerndBreidenstein2024-02-202024-02-202024-02-19Angewandte Chemie 136 (8): e202312473 (2024)https://hdl.handle.net/11420/45823Ruddlesden-Popper-type oxides exhibit remarkable chemical stability in comparison to perovskite oxides. However, they display lower oxygen permeability. We present an approach to overcome this trade-off by leveraging the anisotropic properties of Nd2NiO4+δ. Its (a,b)-plane, having oxygen diffusion coefficient and surface exchange coefficient several orders of magnitude higher than its c-axis, can be aligned perpendicular to the gradient of oxygen partial pressure by a magnetic field (0.81 T). A stable and high oxygen flux of 1.40 mL min−1 cm−2 was achieved for at least 120 h at 1223 K by a textured asymmetric disk membrane with 1.0 mm thickness under the pure CO2 sweeping. Its excellent operational stability was also verified even at 1023 K in pure CO2. These findings highlight the significant enhancement in oxygen permeation membrane performance achievable by adjusting the grain orientation. Consequently, Nd2NiO4+δ emerges as a promising candidate for industrial applications in air separation, syngas production, and CO2 capture under harsh conditions.en0044-824920248Wileyhttps://creativecommons.org/licenses/by-nc-nd/4.0/Conducting Materials | Magnetic Field | Mixed Ionic Electronic Conducting Membranes | Oxygen Separation | TextureChemistryJournal Articlehttps://doi.org/10.15480/882.1484810.1002/ange.20231247310.15480/882.14848Journal Article