Interfacial Engineering for Enhanced Protonic Conduction in NaxCoO2−δ–Sm0.2Ce0.8O2−δ Semiconductor Ionic Heterostructures for Low-Temperature Solid Oxide Fuel Cells DOI

Kalaimathi Sivanandam,

K. Suresh Babu

ACS Applied Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 21, 2024

Interfacial engineering is pivotal in optimizing the ionic conductivity semiconductor–ionic electrolytes for low-temperature solid oxide fuel cells (LT-SOFCs). In this study, we propose a semiconductor NaxCoO2−δ and Sm0.2Ce0.8O2−δ (SDC) heterostructure as functional membrane sandwiched between two symmetric porous electrodes LiNi0.8Co0.15Al0.05O2−δ (NCAL). The A-site non-stoichiometry modifies energy band structure by altering Co3+/Co4+ concentration, thereby regulating conduction properties. Structural electrical characterization of material was conducted to investigate heterointerfaces, oxygen vacancies, their influence on charge carrier transportation. Electrochemical impedance spectroscopy demonstrated remarkable performance Na0.7CoO2–SDC (NCO7–SDC), which exhibited an 0.132 S/cm at 550 °C under 3% H2O humidified (4% H2 + 96% N2) conditions. Enhanced interfacial transportation attributed synergistic interplay Li+-rich space-charge layers, alignment, excess vacancies generated interface along with Schottky junction metallic Ni-electrode electrolyte. Our investigation further reveals that optimal concentration Na ions crucial inducing appropriate bending vacancy generation Na0.7CoO2–SDC, enhance protonic conduction. XPS analysis hydrogen-exposed sample confirmed dominant through H+ OH– species. These findings emphasize potential NaxCoO2–SDC high-performance electrolyte LT-SOFC, even low-concentration fuel, paving way advancement cell technology.

Language: Английский

Insight of proton transport phenomena in semiconductor ionic materials DOI
Shahzad Rasool, Nabeela Akbar, M.A.K. Yousaf Shah

et al.

Journal of Power Sources, Journal Year: 2024, Volume and Issue: 598, P. 234148 - 234148

Published: Feb. 15, 2024

Language: Английский

Citations

15
Alternative Strategy for Development of Dielectric Calcium Copper Titanate-Based Electrolytes for Low-Temperature Solid Oxide Fuel Cells DOI Creative Commons
Sajid Rauf, Muhammad Bilal Hanif,

Zuhra Tayyab

et al.

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 17(1)

Published: Sept. 26, 2024

Abstract The development of low-temperature solid oxide fuel cells (LT-SOFCs) is significant importance for realizing the widespread application SOFCs. This has stimulated a substantial materials research effort in developing high oxide-ion conductivity electrolyte layer In this context, first time, dielectric material, CaCu 3 Ti 4 O 12 (CCTO) designed LT-SOFCs study. Both individual CCTO and its heterostructure with p -type Ni 0.8 Co 0.15 Al 0.05 LiO 2− δ (NCAL) semiconductor are evaluated as alternative electrolytes LT-SOFC at 450–550 °C. single cell exhibits power output approximately 263 mW cm −2 an open-circuit voltage (OCV) 0.95 V 550 °C, while CCTO–NCAL capably delivers improved 605 along higher OCV over 1.0 V, which indicates introduction hole-conducting NCAL into could enhance performance rather than inducing any potential short-circuiting risk. It found that these promising outcomes due to interplay structure, overall properties led improve electrochemical mechanism CCTO–NCAL. Furthermore, density functional theory calculations provide detailed information about electronic structural their Our study thus provides new approach advanced LT-SOFCs.

Language: Английский

Citations

14
Semiconductor Heterostructure (SrFe0.3TiO3-ZnO) Electrolyte with High Proton Conductivity for Low-Temperature Ceramic Electrochemical Cells DOI
M.A.K. Yousaf Shah, Yuzheng Lu, Naveed Mushtaq

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(30), P. 40086 - 40099

Published: July 18, 2024

In recent years, ceramic cells based on high proton conductivity have attracted much attention and can be employed for hydrogen production electricity generation, especially at low temperatures. Nevertheless, attaining a power output durability is challenging, operational this regard, we design semiconductor heterostructure SFT-ZnO (SrFe

Language: Английский

Citations

10
Semiconductor ionic Cu doped CeO2 membrane fuel cells DOI
Muhammad Sharif, Sajid Rauf, Rizwan Raza

et al.

Ceramics International, Journal Year: 2024, Volume and Issue: 50(20), P. 40350 - 40362

Published: April 25, 2024

Language: Английский

Citations

9
Boosting the electrochemical performance of oxygen electrodes via the formation of LSCF-BaCe0.9–xMoxY0.1O3–δ triple conducting composite for solid oxide fuel cells: Part II DOI
Muhammad Bilal Hanif, Sajid Rauf,

Amir Sultan

et al.

Energy, Journal Year: 2023, Volume and Issue: 289, P. 129985 - 129985

Published: Dec. 14, 2023

Language: Английский

Citations

18
Breaking barriers: Novel approaches to proton-conducting oxide materials DOI
Muhammad Tayyab, Sajid Rauf, Abdul Zeeshan Khan

et al.

Ceramics International, Journal Year: 2024, Volume and Issue: 50(20), P. 40526 - 40552

Published: June 5, 2024

Language: Английский

Citations

5
Enabling fast ion conduction in an in-situ self-reconstructed nano-TiO/NiO/Li2CO3 heterogeneous electrolyte DOI

Mengchen Du,

Xiaochun Ma, Shaozheng Ji

et al.

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 633, P. 236428 - 236428

Published: Feb. 6, 2025

Language: Английский

Citations

0
Enhancing the Performance of CaTiO3-GDC Heterostructure Electrolytes in LT-CFCs DOI
Dongchen Li,

Ying-Ying Cui,

Xiaofang Hong

et al.

Ceramics International, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

Citations

0
High Proton Conductivity in xCuO/(1‐x)CeO2 Electrolytes Induced by CuO Self‐Nucleation and Electron‐Ion Coupling DOI Creative Commons
Muhammad Sharif, Sajid Rauf,

Zuhra Tayyab

et al.

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

Operating within the 300-500 °C range, low-temperature solid oxide fuel cells (LT-SOFCs) enable efficient and sustainable energy conversion, addressing limitations of conventional high-temperature SOFCs. However, achieving >0.1 S cm-1 ionic conductivity in electrolytes remains challenging. Here, a novel approach utilizing CuO self-nucleation electron-ion (E-I) coupling xCuO/(1-x) CeO2 (CCO) semiconductor membranes (x = 0-0.4) is presented. At optimal 0.2CuO/0.8CeO2 composition, exceeds 0.15 cm-1, driven by E-I at CuO/CeO2 heterojunction. This creates built-in electric field (BIEF) via interfacial charge transfer, facilitating ion transport lowering activation for migration. The dual-conduction pathway enabled not only facilitates electronic transfer but also optimizes kinetics, exceptional power densities 750-900 mW cm-2 500-550 78 300 °C. Density functional theory (DFT) calculations further validate role Cu2+ Ce4+ valence states generating enhancing mobility. innovative positions as state-of-the-art electrolyte, building critical conductivity-performance gap LT-SOFCs. study pioneers LT-SOFC innovation leveraging electrode-electrolyte synergy, unlocking superior practical applicability.

Language: Английский

Citations

0
Overdoping-induced CeO2-modified PBCF heterostructures for enhanced proton-conducting SOFCs DOI

K. Liu,

Zhongyu Hou,

Qi Li

et al.

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 127, P. 896 - 902

Published: April 18, 2025

Language: Английский

Citations

0