Inkjet Printing of Solid Oxide Fuel Cells and Proton Ceramic Fuel Cells

2019 ◽  
Vol 91 (1) ◽  
pp. 1059-1063
Author(s):  
Eun Heui Kang ◽  
Gwon Deok Han ◽  
Hyung Jong Choi ◽  
Kiho Bae ◽  
Heonjun Jeong ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Inkjet Printing ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Ceramic Fuel ◽  
Ceramic Fuel Cells

scholarly journals Comparison of electrochemical impedance spectra for electrolyte-supported solid oxide fuel cells (SOFCs) and protonic ceramic fuel cells (PCFCs)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hirofumi Sumi ◽  
Hiroyuki Shimada ◽  
Yuki Yamaguchi ◽  
Yasunobu Mizutani ◽  
Yuji Okuyama ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Electrochemical Impedance ◽  
Gas Diffusion ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Impedance Spectra ◽  
Cathode Polarization ◽  
Ceramic Fuel ◽  
Ceramic Fuel Cells

AbstractProtonic ceramic fuel cells (PCFCs) are expected to achieve high power generation efficiency at intermediate temperature around 400–600 °C. In the present work, the distribution of relaxation times (DRT) analysis was investigated in order to deconvolute the anode and cathode polarization resistances for PCFCs supported on yttria-doped barium cerate (BCY) electrolyte in comparison with solid oxide fuel cells (SOFCs) supported on scandia-stabilized zirconia (ScSZ) electrolyte. Four DRT peaks were detected from the impedance spectra measured at 700 °C excluding the gas diffusion process for ScSZ and BCY. The DRT peaks at 5 × 102–1 × 104 Hz and 1 × 100–2 × 102 Hz were related to the hydrogen oxidation reaction at the anode and the oxygen reduction reaction at the cathode, respectively, for both cells. The DRT peak at 2 × 101–1 × 103 Hz depended on the hydrogen concentration at the anode for ScSZ, while it was dependent on the oxygen concentration at the cathode for BCY. Compared to ScSZ, steam was produced at the opposite electrode in the case of BCY, which enhanced the cathode polarization resistance for PCFCs.

scholarly journals Development of Ammonia Fueled Solid Oxide Fuel Cells

Ceramist ◽  
2021 ◽  
Vol 24 (4) ◽  
pp. 368-385
Author(s):  
Jong-Eun Hong ◽  
Seung-Bok Lee ◽  
Dong Woo Joh ◽  
Hye-Sung Kim ◽  
Tak-Hyoung Lim ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
High Efficiency ◽  
Current Collector ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Hydrogen Carrier ◽  
Ceramic Fuel ◽  
Ceramic Fuel Cells ◽  
Thermal Imbalance

Solid oxide fuel cells (SOFCs) can generate electricity through an electrochemical conversion of the chemical energy of fuels including hydrogen, hydrocarbons, and biogas because of high operation temperatures. Ammonia has recently been considered as a promising hydrogen carrier that is relatively convenient to store and transport and can be decomposed into hydrogen and nitrogen with no carbon emission via catalytic cracking. Thus, much effort has been made to utilize ammonia as a clean fuel to SOFCs for power generation at high efficiency. This review is aiming at delivering the current progress of developing high temperature ceramic fuel cells fed with ammonia, particularly more focused on the achievements of a direct ammonia fueled SOFC (DA-SOFC) to shed light on the challenges of degrading the performance and durability. The problems are primarily attributed to a lack of rational catalysts, thermal imbalance, and the evolution of nitrides on the components including the Ni based anode, Ni mesh as current collector, and stainless steels of metallic interconnect that are exposed to the ammonia fuel environment incurring microstructural deformations and electrical and electrochemical deteriorations. Lastly, strategic pathways to overcome the inadequate performance and the instability are suggested to accomplish a commercialization of DA-SOFCs.

scholarly journals An Interface Heterostructure of NiO and CeO2 for Using Electrolytes of Low-Temperature Solid Oxide Fuel Cells

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2004
Author(s):  
Junjiao Li ◽  
Jun Xie ◽  
Dongchen Li ◽  
Lei Yu ◽  
Chaowei Xu ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Ionic Conductivity ◽  
Ionic Conductivities ◽  
Solid Oxide ◽  
Electrode Polarization ◽  
Oxide Fuel ◽  
Type Semiconductor ◽  
Ceramic Fuel ◽  
Ceramic Fuel Cells

Interface engineering can be used to tune the properties of heterostructure materials at an atomic level, yielding exceptional final physical properties. In this work, we synthesized a heterostructure of a p-type semiconductor (NiO) and an n-type semiconductor (CeO2) for solid oxide fuel cell electrolytes. The CeO2-NiO heterostructure exhibited high ionic conductivity of 0.2 S cm−1 at 530 °C, which was further improved to 0.29 S cm−1 by the introduction of Na+ ions. When it was applied in the fuel cell, an excellent power density of 571 mW cm−1 was obtained, indicating that the CeO2-NiO heterostructure can provide favorable electrolyte functionality. The prepared CeO2-NiO heterostructures possessed both proton and oxygen ionic conductivities, with oxygen ionic conductivity dominating the fuel cell reaction. Further investigations in terms of electrical conductivity and electrode polarization, a proton and oxygen ionic co-conducting mechanism, and a mechanism for blocking electron transport showed that the reconstruction of the energy band at the interfaces was responsible for the enhanced ionic conductivity and cell power output. This work presents a new methodology and scientific understanding of semiconductor-based heterostructures for advanced ceramic fuel cells.

scholarly journals Inkjet Printing Functionalization of SOFC LSCF Cathodes

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 654 ◽  
Author(s):  
Eleonora Venezia ◽  
Massimo Viviani ◽  
Sabrina Presto ◽  
Vasant Kumar ◽  
Rumen I. Tomov
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Inkjet Printing ◽  
High Efficiency ◽  
Electrochemical Impedance ◽  
Electrical Energy ◽  
Reduction Reaction ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Ion Conductor

An important segment of the future renewable energy economy is the implementation of novel energy generation systems. Such electrochemical systems are solid oxide fuel cells, which have the advantage of direct conversion of the chemical energy stored in the fuel to electrical energy with high efficiency. Improving the performance and lowering the cost of solid oxide fuel cells (SOFCs) are strongly dependent on finding commercially viable methods for nano-functionalization of their electrodes via infiltration. Inkjet printing technology was proven to be a feasible method providing scalability and high-resolution ink delivery. LaxSr1−xCoyFe1−yO3−δ cathodes were modified using inkjet printing for infiltration with two different materials: Gd-doped ceria (CGO) commonly used as ion-conductor and La0.6Sr0.4CoO3–δ (LCO) commonly used as a mixed ionic electronic conductor. As-modified surface structures promoted the extension of the three-phase boundary (TPB) and enhanced the mechanisms of the oxygen reduction reaction. Electrochemical impedance measurements revealed significantly lowered polarization resistances (between 2.7 and 3.7 times) and maximum power output enhancement of 24% for CGO infiltrated electrodes and 40% for LCO infiltrated electrodes.

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