Recent advances in layered Ln(2)NiO(4+delta) nickelates: fundamentals and prospects of their applications in protonic ceramic fuel and electrolysis cells

abstract

In the past decade, intensive research on proton-conducting oxide materials has provided a basis for the development of intermediate-temperature protonic ceramic electrochemical cells, which constitute a real alternative to conventional cells based on oxygen-conducting electrolytes. To achieve both high efficiency and excellent performance, not only electrolytes but also electrode materials should be carefully selected considering their functional properties. Compared to the traditional ABO(3) perovskite electrode materials, Ln(2)NiO(4+delta) with a layered structure has unique advantages (high chemical stability, mechanical compatibility, improved oxygen transport, and hydration ability), and thus is now becoming a hot topic in this field, offering both scientific and practical interests. However, a comprehensive and in-depth review is still lacking in the literature to date. Accordingly, this work presents a comprehensive overview of the prospects of layered nickelates (Ln(2)NiO(4+delta), where Ln = La, Nd, and Pr) as one of the most attractive oxygen (steam) electrode materials for protonic ceramic electrochemical cells. In particular, the crystalline features, defect structure, stability, chemical properties, and mechanical compatibility of this class of materials, contributing to their transport functionality, are discussed with the primary emphasis on revealing the relationship between the composition of the materials and their properties. The presented systematic results reveal the main strategies regarding the utilisation of Ln(2)NiO(4+delta)-based electrodes and existing gaps related to fundamental and applied research aspects.

keywords

SOLID-OXIDE FUEL; STRUCTURAL PHASE-TRANSITION; OXYGEN-TRANSPORT PROPERTIES; NEUTRON POWDER DIFFRACTION; RUDDLESDEN-POPPER OXIDE; SOFC CATHODE MATERIAL; X-RAY-DIFFRACTION; HIGH-TEMPERATURE PHASE; PEROVSKITE-TYPE OXIDES; EPITAXIAL THIN-FILMS

subject category

Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary

authors

Tarutin, AP; Lyagaeva, JG; Medvedev, DA; Bi, L; Yaremchenko, AA

Groups

G3 - Electrochemical Materials, Interfaces and Coatings

Projects

CICECO - Aveiro Institute of Materials (UIDB/50011/2020)

CICECO - Aveiro Institute of Materials (UIDP/50011/2020)

Nano-argilas para remoção/captura de fosfatos (P) e sua reutilização como fertilizante (NATURAL)

acknowledgements

A. Y. gratefully acknowledges financial support from the FCT, Portugal (project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the FCT/MCTES and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement). L. B. gratefully acknowledges the support from the National Natural Science Foundation of China (grant no. 51972183) and the Startup Funding for Talents at University of South China. A. T., J. L and D. M. are grateful to the national projects, supported by the Russian Science Foundation [grant no. 16-19-00104] and the Council of the President of the Russian Federation [scholarship no. C Pi-161.2018.1 and C Pi-1413.2019.1].