Highly promoted performance of triple-conducting cathode for YSZ-based SOFC via fluorine anion doping

Wang, Wei; Xiao-zhen, Zhang; Zhang, Dandan; Zeng, Qiannan; Jiang, Yuhua; Lin, Bin

doi:10.1016/j.ceramint.2020.06.173

Cited by 45 publications

(22 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The three peaks of oxygen are related to the divergence of chemical environment in the sample, which are divided into lattice oxygen, defect oxygen and oxygen vacancy [ 28 ]. The O 1s XPS core-level spectra of the CeO 2 and SNDC samples ( Figure 3 b) shows two types of different oxygen species features, including the chemically adsorbed oxygen species (O ads ) and the lattice oxygen (O latt ) [ 29 ]. In general, the peak at 527.2–529.4 eV are attributed to O latt (O 2− ), while the signal of the binding energy at 529.5–532.1 eV corresponds to the oxide defects or the surface oxygen species (O ads ) adsorbed on the oxygen vacancies (i.e., O − , OH − , and CO 3 2− ) [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

High Performance Low-Temperature Solid Oxide Fuel Cells Based on Nanostructured Ceria-Based Electrolyte

Liu

Zhu

et al. 2021

Nanomaterials

View full text Add to dashboard Cite

Ceria based electrolyte materials have shown potential application in low temperature solid oxide fuel cells (LT-SOFCs). In this paper, Sm3+ and Nd3+ co-doped CeO2 (SNDC) and pure CeO2 are synthesized via glycine-nitrate process (GNP) and the electro-chemical properties of the nanocrystalline structure electrolyte are investigated using complementary techniques. The result shows that Sm3+ and Nd3+ have been successfully doped into CeO2 lattice, and has the same cubic fluorite structure before, and after, doping. Sm3+ and Nd3+ co-doped causes the lattice distortion of CeO2 and generates more oxygen vacancies, which results in high ionic conductivity. The fuel cells with the nanocrystalline structure SNDC and CeO2 electrolytes have exhibited excellent electrochemical performances. At 450, 500 and 550 °C, the fuel cell for SNDC can achieve an extraordinary peak power densities of 406.25, 634.38, and 1070.31 mW·cm−2, which is, on average, about 1.26 times higher than those (309.38, 562.50 and 804.69 mW·cm−2) for pure CeO2 electrolyte. The outstanding performance of SNDC cell is closely related to the high ionic conductivity of SNDC electrolyte. Moreover, the encouraging findings suggest that the SNDC can be as potential candidate in LT-SOFCs application.

show abstract

Section: Resultsmentioning

confidence: 99%

High Performance Low-Temperature Solid Oxide Fuel Cells Based on Nanostructured Ceria-Based Electrolyte

Liu

Zhu

et al. 2021

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…The peak power density increases with the increase in the amount of CeO 2 and then drops with the further increase in CeO 2 content. Remarkable peak power density of 1140 mW·cm −2 is obtained for BCCY-4CeO 2 , which is even higher than those of the conventional SOFCs using condensed YSZ, doped-CeO 2 electrolytes under the identical operating conditions [ 46 , 47 ]. High performance of the cell is a result of the triple (H + /O 2− /e − ) conducting nature of perovskite BCCY.…”

Section: Resultsmentioning

confidence: 99%

Self-Assembled Triple (H+/O2−/e−) Conducting Nanocomposite of Ba-Co-Ce-Y-O into an Electrolyte for Semiconductor Ionic Fuel Cells

Yan

et al. 2021

Nanomaterials

View full text Add to dashboard Cite

Triple (H+/O2−/e−) conducting oxides (TCOs) have been extensively investigated as the most promising cathode materials for solid oxide fuel cells (SOFCs) because of their excellent catalytic activity for oxygen reduction reaction (ORR) and fast proton transport. However, here we report a stable twin-perovskite nanocomposite Ba-Co-Ce-Y-O (BCCY) with triple conducting properties as a conducting accelerator in semiconductor ionic fuel cells (SIFCs) electrolytes. Self-assembled BCCY nanocomposite is prepared through a complexing sol–gel process. The composite consists of a cubic perovskite (Pm-3m) phase of BaCo0.9Ce0.01Y0.09O3-δ and a rhombohedral perovskite (R-3c) phase of BaCe0.78Y0.22O3-δ. A new semiconducting–ionic conducting composite electrolyte is prepared for SIFCs by the combination of BCCY and CeO2 (BCCY-CeO2). The fuel cell with the prepared electrolyte (400 μm in thickness) can deliver a remarkable peak power density of 1140 mW·cm−2 with a high open circuit voltage (OCV) of 1.15 V at 550 °C. The interface band energy alignment is employed to explain the suppression of electronic conduction in the electrolyte. The hybrid H+/O2− ions transport along the surfaces or grain boundaries is identified as a new way of ion conduction. The comprehensive analysis of the electrochemical properties indicates that BCCY can be applied in electrolyte, and has shown tremendous potential to improve ionic conductivity and electrochemical performance.

show abstract

“…An amiable hydration is attributed by an incremental variation in hydration enthalpy (Δ H hyd ), less negative hydration entropy change (Δ S hyd ), and negative hydration Gibbs free energy change (Δ G hyd ) demonstrating electrochemical spontaneity . An escalating hydration limit also assists increased protonation with a proportional contribution to rising proton conductivity. − Recessing a dopant’s electronegativity over a host cation enforces a higher exothermic Δ H hyd , increasing the hydration tendency and proton availability for diffusion . A high hydration tendency in pure and BaCeO 3 derivatives alongside the high chemical stability of BaZrO 3 under hydrated and carbonated atmospheres makes them rational options as promising proton conducting electrolytes.…”

Section: Perovskite-type Fuel Cellsmentioning

confidence: 99%

Factors Constituting Proton Trapping in BaCeO₃ and BaZrO₃ Perovskite Proton Conductors in Fuel Cell Technology: A Review

2022

View full text Add to dashboard Cite

Urbanization with increasing demand for energy at a rapid pace has prompted researchers to explore effective and efficient energy storage technology. Fuel cells, being well-known among other existing devices, are categorized based on the nature of the electrolyte employed. In several areas, proton conduction solid oxide fuel cells have surpassed conventional solid oxide fuel cells. Nonetheless, there still prevail drawbacks accompanied with the proton-conducting electrolyte materials. However, the disadvantages associated with proton-conducting electrolytic materials persists. Besides chemical stability, one of the significant concerns is the fluctuation in proton conductivity among acceptor-doped compositions. Recent introspection interprets the proton trapping effect in the vicinity of the substituent attenuating proton mobility, the fundamentals of which point toward a proton-dopant complex interaction and altering basicity of the dopant neighboring oxygen atoms, escalating the activation energy. This implies a pronounced affinity of proton-trapped sites in the close coordination of the acceptor dopant while implying trap-free sites elsewhere. In the following review article, we direct our attention to the assimilation of factors responsible for the genesis of proton trapping sites with an additional motive to explore the optimal composition while achieving maximum productivity.

show abstract

Highly promoted performance of triple-conducting cathode for YSZ-based SOFC via fluorine anion doping

Cited by 45 publications

References 36 publications

High Performance Low-Temperature Solid Oxide Fuel Cells Based on Nanostructured Ceria-Based Electrolyte

High Performance Low-Temperature Solid Oxide Fuel Cells Based on Nanostructured Ceria-Based Electrolyte

Self-Assembled Triple (H+/O2−/e−) Conducting Nanocomposite of Ba-Co-Ce-Y-O into an Electrolyte for Semiconductor Ionic Fuel Cells

Factors Constituting Proton Trapping in BaCeO₃ and BaZrO₃ Perovskite Proton Conductors in Fuel Cell Technology: A Review

Contact Info

Product

Resources

About

Highly promoted performance of triple-conducting cathode for YSZ-based SOFC via fluorine anion doping

Cited by 45 publications

References 36 publications

High Performance Low-Temperature Solid Oxide Fuel Cells Based on Nanostructured Ceria-Based Electrolyte

High Performance Low-Temperature Solid Oxide Fuel Cells Based on Nanostructured Ceria-Based Electrolyte

Self-Assembled Triple (H+/O2−/e−) Conducting Nanocomposite of Ba-Co-Ce-Y-O into an Electrolyte for Semiconductor Ionic Fuel Cells

Factors Constituting Proton Trapping in BaCeO3 and BaZrO3 Perovskite Proton Conductors in Fuel Cell Technology: A Review

Contact Info

Product

Resources

About

Factors Constituting Proton Trapping in BaCeO₃ and BaZrO₃ Perovskite Proton Conductors in Fuel Cell Technology: A Review