Advanced Proton-Conducting Ceramics Based on Layered Perovskite BaLaInO4 for Energy Conversion Technologies and Devices

Abstract

Production of high efficiency renewable energy source for sustainable global development is an important challenge for humans. Hydrogen energy systems are one of the key elements for the development of sustainable energy future. These systems are eco-friendly and include devices such as protonic ceramic fuel cells, which require advanced proton-conducting materials. In this study, we focused on new ceramics with significantly improved target properties for hydrogen energy purposes. Neodymium-doped phase based on layered perovskite BaLaInO4 was obtained for the first time. The ability for water intercalation and proton transport was proved. It was shown that the composition BaLa0.9Nd0.1InO4 is the predominant proton conductor below 400 °C under wet air. Moreover, isovalent doping of layered perovskites AA′BO4 is the promising method for improving transport properties and obtaining novel advanced proton-conducting ceramic materials.

Layered Perovskites BaLnnInnO3n+1 (n = 1, 2) for Electrochemical Applications: A Mini Review

“…However, some features can be highlighted. Firstly, the increase in the conductivity values for the monolayer BaLaInO 4 [ 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 ] and BaNdInO 4 [ 70 , 72 , 73 , 84 , 85 , 86 ] compositions is more significant than for the two-layer BaLa 2 In 2 O 7 [ 74 , 87 , 88 , 89 , 90 ] and BaNd 2 In 2 O 7 [ 75 , 91 ] compositions (~1.5 vs. ~1. order of magnitude).…”

“…The possibility of isovalent doping was proved for the monolayer and two-layer La-containing composition. The compositions with the doping of the La-sublattice BaLa 0.9 Gd 0.1 InO 4 [ 81 ], BaLa 0.9 Nd 0.1 InO 4 [ 82 ], BaLa 2– x Gd x In 2 O 7 0 ≤ x ≤ 0.15 [ 90 ] and In-sublattice BaLaIn 0.9 Sc 0.1 O 4 [ 79 ], BaLaIn 1− x Y x O 4 (0 ≤ x ≤ 0.5) [ 80 ] were obtained and investigated.…”

A Review on Low-Temperature Protonic Conductors: Principles and Chemical Sensing Applications

“…In addition, tests using direct methanol fuel cells showed that the best performance of the SPVDF-ZWP-PSSA membrane was obtained at an operating temperature of 60 • C, with a power density of ~20.0 mW/cm 2 [146]. The use of proton-conducting ceramics in energy conversion and storage applications represents a significant segment of the advances in the domain of solid-state protonic conductors [88,89,147,148]. In the literature, it is possible to find representative studies on the advancement of the use of proton-conducting fuel cells.…”

Local structure and ionic transport in acceptor-doped layered perovskite BaLa2In2O7

“…Several years ago, the possibility of ionic transport was revealed for the layered perovskites with the Ruddlesden-Popper structure [26]. Materials based on BaNdInO4 [27][28][29][30][31][32], SrLaInO4 [33][34][35][36][37], BaLaScO4 [38], BaLaInO4 [39][40][41][42][43][44], BaLa2In2O7 [45,46] and BaNd2In2O7 [47,48] were investigated as oxygen-ionic and protonic conductors. The effect of the doping on the local structure and its relationship with transport properties was shown for layered perovskites based on BaLaInO4 [49,50].…”