Advanced Manufacturing of Intermediate-Temperature Protonic Ceramic Electrochemical Cells

Abstract

Proton conducting oxide (i.e., protonic ceramic) has been thought of as an ideal solid electrolyte for energy conversion and storage applications since Iwahara et al. reported the perovskite-type protonic ceramics represented by doped barium/strontium cerates and zirconates in the 1980s. Proton, as the charge carrier in protonic ceramics, possesses a much lower transport activation energy than oxide-ion, which has rendered protonic ceramics for extensive intermediate-temperature (IT, 400-700°C) electrochemical devices such as protonic ceramic fuel cells (PCFCs), reversible protonic ceramic fuel cells, and protonic ceramic membrane reactors.

Toward Superb Perovskite Oxide Electrocatalysts: Engineering of Coupled Nanocomposites

“…In parallel with SOFCs, PCFCs that are based on a protonconducting electrolyte show potential application in the intermediate-temperature range (300 to 600 °C) due to the lower activation energy of proton conduction than that of O 2− . [77,[158][159][160][161][162][163][164][165][166][167][168][169][170] The proton (H + ) diffuses from anode to cathode via the electrolyte, then reacts with O 2 to produce H 2 O at the cathode (Figure 17A). However, with reducing the operating temperature, the performance of cells declines significantly as the kinetically sluggish ORR/OER reaction.…”

Recent Novel Fabrication Techniques for Proton-Conducting Solid Oxide Fuel Cells

“…Protons serve as the charge carriers in protonic ceramics, possessing much lower transport activation energy than oxide ions. This characteristic has made protonic ceramics suitable for extensive use in intermediate temperature (400-650 • C) electrochemical devices [13][14][15][16][17]. Over the past decade, the PCFC has emerged as a leading energy conversion device due to its low operating temperature, in which various renewable fuels can be directly converted into electricity at low temperatures [14,18].…”

Proton conductivity of Li+–H+ exchanged Li7La3Zr2O12 dense membranes prepared by molten long-chain saturated fatty acids

“…CsHSO 4 derivatives [8][9][10] ), and perovskite-type oxide refractories that are stable even in the dehydrated state but show high conductivity only at high temperatures above 600 1C (e.g. BaZrO 3 -BaCeO 3 derivatives [11][12][13][14] ). Many efforts have been made to develop thermostable oxyacids (e.g.…”