BaCo0·4Fe0·4Zr0·1Y0·1O3 –δ triple conductor for boosting electrode efficiency for proton conducting fuel cells

Comprehensive review and future perspectives: 3D printing technology for all types of solid oxide cells

“…It is equally essential to develop electrolytes materials that preserve both physicochemical stability and a high transference number across diverse conditions over long term periods [77]. Another approach involves enhancing performance by modifying the interface between the electrode and the electrolyte [32,43] or by forming active catalyst [25,37,78] on the surface of electrode. Although the development of novel materials for the enhancement of SOCs performance is an important approach, beyond material innovation, Stainless steel (400) 12 [71] optimising cell structures within a geometrically confined area to maximise the redox reaction sites is also a crucial direction [79].…”

A robust protonic ceramic fuel cell with a triple conducting oxygen electrode under accelerated stress tests

“…BaCo 0.4 Fe 0.4 Zr 0.1 Y 0.1 O 3Àd , another TCO material, was based on a material family of proton conducting electrolytes with intrinsic proton formation properties, resulting in a significant improvement in the overall performance of the cell. [26][27][28] Some other examples also include a group of unique La-Ni based layered perovskites, recognized as Ruddlesden-Popper oxides, La n+1 Ni n O 3n+1 , being selected as an alternate material for the cathode. Pr 1.75 Ba 0.25 NiO 4+d and Pr 1.2 Sr 0.8 NiO 4+d , with different substitution at the A-site, both exhibited triple mixed conductivity.…”

“…[20][21][22][23] There have been several examples of triple conducting oxide (TCO) materials being developed, demonstrating significant proton conductivity and improved cell performance by increasing the reaction efficiency of both the hydrogen oxidation reaction (HOR) and the oxygen reduction reaction (ORR) at triple phase boundaries (TPBs). [24][25][26][27] PrBa 0.5 Sr 0.5 Co 2Àx Fe x O 5+d (x = 0, 0.5 and 1.0), one promising layered perovskite, was compounded to promote electrochemical active sites, realizing lower area specific resistance (ASR), 0.33 O cm 2 at 500 1C and 0.056 O cm 2 at 600 1C, than Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-d at similar temperature (0.70 O cm 2 at 500 1C). 24,25 These doped variants demonstrated the intensified oxygen bulk diffusion and surface exchange.…”

Enhancing the Oxygen Reaction Kinetics through Compositing BaCoO3-δ with Triple Conductor BaCo0.4Fe0.4Zr0.1Y0.1O3−δ for Proton-Conducting Solid Oxide Fuel Cells

“…The current research on air electrode materials in PCFCs primarily focuses on the development of novel materials and optimization of microstructures to enhance electrochemical activity, conductivity, and stability. , Extensive research has been conducted to enhance these properties through the development of proton/oxygen ion/electron triple conductive oxide (H + /O 2– /e – , TCO) materials. Among various candidates, BaCo 0.4 Fe 0.4 Zr 0.1 Y 0.1 O 3−δ (BCFZY) is considered a promising electrode material due to its high efficiency and stability. − However, several challenges remain that hinder the full exploitation of BCFZY’s potential as an air electrode material for PCFCs, including poor O 2– /e – mixed conductivity and insufficient activity. − …”