The fabrication of a highly conductive ceria-embedded gadolinium-stabilized bismuth oxide nanocomposite solid electrolyte for low-temperature solid oxide fuel cells

Abjana Parbin,Rafiuddin Rafiuddin

doi:10.1039/d1ma01254a

Abjana Parbin, Rafiuddin Rafiuddin

Open Access

https://doi.org/10.1039/d1ma01254a

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Journal: Materials advances	Publication Date: Jan 1, 2022
Citations: 7	License type: CC BY 3.0

Affiliation: Aligarh Muslim University

Abstract

We report the synthesis of a nanocomposite solid electrolyte, (1 −x)Bi2O3–Gd2O3:xCeO2(GDBC), made up of ceria-embedded gadolinium-stabilized bismuth oxide (Bi2O3–Gd2O3, GDB) for low-temperature solid oxide fuel cell (LT-SOFC) applications.

Highlights

The rapid ionic conduction of d-Bi2O3 and similar materials means they are regarded as potential electrolytes for use in low-temperature solid oxide fuel cells (LT-Solid oxide fuel cells (SOFCs)) and moderate-temperature oxygen sensors
The high dielectric constants for all wt% ratios of CeO2 nanofiller could be linked to a buildup of charge at the sample-electrode interface, which is known as space charge polarization, or it might be due to interfacial polarization, as predicted by Maxwell–Wagner theory
It can be inferred that the higher the conductivity, the higher the dielectric constant of the nanocomposite

Summary

Introduction

The widespread use of renewable energy sources is entirely dependent on the development of efficient energy storage technologies. Solid oxide fuel cells (SOFCs) are sophisticated electrochemical energy-conversion devices that convert chemical energy directly into electrical energy.[8] They have excellent prospects for addressing the increasing demands for energy because of their high conversion efficiencies, low emissions, zero noise, and wide application potential.[9]. The rapid ionic conduction of d-Bi2O3 and similar materials means they are regarded as potential electrolytes for use in low-temperature solid oxide fuel cells (LT-SOFCs) and moderate-temperature oxygen sensors. As a result, adding 40 wt% Gd2O3 (the ionic radius of Gd3+ is 1.078 Å) to the material can significantly improve its performance.[15] This substitution stabilizes the fast ionic conducting phase, the increased reactivity and the structural and chemical stabilities under heat cycling and repeated exposure to decreasing oxygen partial pressure are key concerns relating to practical use in SOFCs.[21]. Electrochemical studies have been done to explore the use of these materials in LT-SOFCs

Sample fabrication

Sample characterization

Characterization of (1 À x)Bi2O3–Gd2O3:xCeO2 nanocomposite solid electrolyte

Dielectric properties of (1 À x)Bi2O3–Gd2O3:xCeO2 nanocomposite solid electrolyte

Conclusions