Regulation of Cathode Mass and Charge Transfer by Structural 3D Engineering for Protonic Ceramic Fuel Cell at 400 °C (Adv. Funct. Mater. 33/2021)

Abstract

In article number 2102907, Wei Wu, Meng Zhou, Dong Ding, and co-workers develop a 3D engineered cathode to enhance oxygen reduction reaction kinetics on a proton-conducting fuel cell at <600 °C. The results demonstrate remarkable cell performance at 400-600 °C by effectively regulating the mass and charge transfer through the electrode and across the interface of electrolyte and electrode.

Manipulating and Optimizing the Hierarchically Porous Electrode Structures for Rapid Mass Transport in Solid Oxide Cells

“…[ 76,77 ] The porosity of the cathode structure affects the transport of gas (oxygen) to the reaction zone (the TPB). [ 173 ] The high porosity of the cathode facilitates the transport of gas, thereby enhancing cell performance. Considerable effort has been devoted to optimizing the cathode substrate structure to improve cell performance.…”

“…Considerable effort has been devoted to optimizing the cathode substrate structure to improve cell performance. [ 173–175 ] LSM is a well‐developed cathode material for SOFC. One traditional method for cathode preparation is to mechanically mix LSM and YSZ powders, which is challenging to obtain the ideal structure and sufficient porosity.…”

“…[ 176 ] At this stage, nanostructured cathode materials can be prepared by electro‐spinning and self‐architecturing methods, which can provide high permeability, high porosity, and good thermal stability. [ 77,173 ] The LSM‐infiltrated YSZ nanofibrous scaffolds were fabricated by Zhi et al. using electro‐spinning combined with infiltration techniques.…”

“…A self‐architecture approach was utilized to fabricate nanostructured cathode substrates (PBSCF) that can be applied to direct carbon fuel cells (DCFCs) and protonic ceramic electrolysis cells (PCECs) and investigated the effect of self‐architecture temperature on electrode porosity and fiber morphology. [ 173 ] When the cathode prepared by self‐architecture was used in DCFCs, the carbon utilization rate reaches 87.3% at 600 °C. [ 173 ] When applied to PCECs, the electrochemical performance of the electrode was 66% higher than that of the electrode prepared by the screen‐printing method under the same test conditions.…”

Electrochemically Engineered, Highly Energy-Efficient Conversion of Ethane to Ethylene and Hydrogen below 550 °C in a Protonic Ceramic Electrochemical Cell

“…The generated oxygen ions combine with the carbon deposition in the anode to release CO and/or CO 2 , recuperating the catalyst. The PBFM 3D electrode is fabricated by a template-driven high-temperature formation process reported in our previous work. − The fabrication and characterization details are described in the Material and Methods Section in the Supporting Information (Figure S1, Supporting Information).…”