Proton-conducting ceramics (PCCs) are of considerable interest for use in energy conversion and storage applications, electrochemical sensors, and separation membranes. PCCs that combine performance, efficiency, stability, and an ability to operate at low temperatures are particularly attractive. This review summarizes the recent progress made in the development of low-temperature proton-conducting ceramics (LT-PCCs), which are defined as operating in the temperature range of 25–400 °C. The structure of these ceramic materials, the characteristics of proton transport mechanisms, and the potential applications for LT-PCCs will be summarized with an emphasis on protonic conduction occurring at interfaces. Three temperature zones are defined in the LT-PCC operating regime based on the predominant proton transfer mechanism occurring in each zone. The variation in material properties, such as crystal structure, conductivity, microstructure, fabrication methods required to achieve the requisite grain size distribution, along with typical strategies pursued to enhance the proton conduction, is addressed. Finally, a perspective regarding applications of these materials to low-temperature solid oxide fuel cells, hydrogen separation membranes, and emerging areas in the nuclear industry including off-gas capture and isotopic separations is presented.

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Review: recent progress in low-temperature proton-conducting ceramics

Review on zirconate-cerate-based electrolytes for proton-conducting solid oxide fuel cell

Trends in research and development of protonic ceramic electrolysis cells

Electrochemical performance of protonic ceramic fuel cells with stable BaZrO3-based electrolyte: A mini-review

Tailoring the first-generation cathode La0.5Sr0.5FeO3−δ with Pr-doping successfully expands the cathode reaction active area and thus leads to a doubled fuel cell power output, which brings new life to the cathode for proton-conducting solid oxide fuel cells.

Impressive performance of proton-conducting solid oxide fuel cells using a first-generation cathode with tailored cations

Further optimization of barium cerate properties via co-doping strategy for potential application as proton-conducting solid oxide fuel cell electrolyte

Xiaoli Guan

Papers

Further optimization of barium cerate properties via co-doping strategy for potential application as proton-conducting solid oxide fuel cell electrolyte

A-site Ca/Sr co-doping to optimize room-temperature TCR of La0.7Ca0.3-Sr MnO3 films

Co-optimization of Na and K doping for improved room-temperature TCR of La0.7(Na0.3-K )MnO3 polycrystalline ceramics

Adjusting the K-doping of La1-K MnO3 (0.1 ≤ x ≤ 0.35) films to obtain high TCR and LFMR at room-temperature

Superior La0.67K0.33-Sr MnO3 films with room-temperature TCR prepared by spin coating method