Engineering topics

Goettler, Richard W.

Publications and source records attributed to Goettler, Richard W..

6 records

DOE OSTI2019

Fuel cell system including multilayer interconnect

In some examples, a fuel cell comprising a first electrochemical cell including a first anode and a first cathode; a second electrochemical cell including a second anode and a second cathode; and an interconnect configured to conduct a flow of electrons from the first anode to the second cathode, wherein the interconnect comprises a first portion and a second portion, wherein the first portion is closer to the anode than the second portion, and the second portion is closer to the cathode than the first portion, wherein the first portion comprises one or more of doped ceria, doped lanthanum chromite, and doped yttrium chromite, and wherein the second portion comprises one or more of a Co—Mn spinel and a ABO3 perovskite.

Liu, Zhien↗

DOE OSTI2018

Composition for fuel cell electrode

In some examples, a fuel cell comprising an anode; an electrolyte; cathode barrier layer; and a nickelate composite cathode separated from the electrolyte by the cathode barrier layer; and a cathode current collector layer. The nickelate composite cathode includes a nickelate compound and an ionic conductive material, and the nickelate compound comprises at least one of Pr.sub.2NiO.sub.4, Nd.sub.2NiO.sub.4, (Pr.sub.uNd.sub.v).sub.2NiO.sub.4, (Pr.sub.uNd.sub.v).sub.3Ni.sub.2O.sub.7, (Pr.sub.uNd.sub.v).sub.4Ni.sub.3O.sub.10, or (Pr.sub.uNd.sub.vM.sub.w).sub.2NiO.sub.4, where M is an alkaline earth metal doped on an A--site of Pr and Nd. The ionic conductive material comprises a first co-doped ceria with a general formula of (A.sub.xB.sub.y)Ce.sub.1-x-yO.sub.2, where A and B of the first co-doped ceria are rare earth metals. The cathode barrier layer comprises a second co-doped ceria with a general formula (A.sub.xB.sub.y)Ce.sub.1-x-yO.sub.2, where at least one of A or B of the second co-doped ceria is Pr or Nd.

30 DIRECT ENERGY CONVERSION↗

DOE OSTI2018

Fuel cell system including sacrificial nickel source

In some examples, solid oxide fuel cell system comprising a solid oxide fuel cell including an anode, an anode conductor layer, a cathode, a cathode conductor layer, and electrolyte, wherein the anode and the anode conductor layer each comprise nickel; and a sacrificial nickel source separate from that of the anode and anode conductor layer, wherein the sacrificial nickel source is configured to reduce the loss or migration of the nickel of the anode and/or the anode current collector in the fuel cell during operation.

30 DIRECT ENERGY CONVERSION↗

DOE OSTI2018

Fuel cell system configured to capture chromium

In some examples, a fuel cell comprising a cathode, a cathode conductor layer adjacent the cathode, an electrolyte separated from the cathode conductor layer by the cathode, and an anode separated from the cathode by the electrolyte, wherein the anode, cathode conductor layer, cathode, and electrolyte are configured to form an electrochemical cell, and wherein at least one of cathode or the cathode conductor layer includes an exsolute oxide configured to capture Cr vapor species present in the fuel cell system.

Xing, Zhengliang↗

DOE OSTI2018

Composition for fuel cell electrode

In some examples, a fuel cell including an anode; electrolyte; and cathode separated from the anode by the electrolyte, wherein the cathode includes a Pr-nickelate based material with (Pr.sub.1-xA x ) n+1 (Ni 1-y B y ) n O 3 n+1+.delta. as a general formula, where n is 1 as an integer, A is an A-site dopant including of a metal of a group formed by one or more lanthanides, and B is a B-site dopant including of a metal of a group formed by one or more transition metals, wherein the A and B-site dopants are provided such that there is an increase in phase-stability and reduction in degradation of the Pr-nickelate based material, and A is at least one metal cation of lanthanides, La, Nd, Sm, or Gd, B is at least one metal cation of transition metals, Cu, Co, Mn, Zn, or Cr, where: 0<x<1, and 0<y.ltoreq.0.4.

25 ENERGY STORAGE↗

DOE OSTI2017

Activity and Stability of (Pr 1-x Nd x ) 2 NiO 4+δ as Cathodes for Oxide Fuel Cells: Part VI. The Role of Cu Dopant on the Structure and Electrochemical Properties

Phase instability in praseodymium nickelates is a major concern for the long-term operations of solid oxide fuel cells since it may lead to the performance degradation. In this work, praseodymium nickelates (ex. Pr 2 NiO 4+δ ) have been stabilized via substitution on both Pr- and Ni-sites. Systematic studies over a wide range of compositions were conducted via long-term thermal annealing studies (T ≤ 870°C) and electrochemical tests in full cells. Proposed (Pr 0.50 Nd 0.50 ) 2 Ni 1-y Cu y O 4+δ compositions (y = 0.05, 0.10, 0.20, and 0.30) showed the most promising results and serve as a comprehensive extension to our previous studies in this series of papers. A stable long-term performance was obtained for temperatures up to 790°C for 500 hours at 0.80 V with a minimal tradeoff between the activity (power density of 0.8–1.0 W cm -2 at 850°C) and performance stability. A preserved parent phase and suppressed performance degradation, when compared to Pr 2 NiO 4+δ , make newly developed electrodes attractive candidates for the state-of-the-art solid oxide fuel cell applications.

36 MATERIALS SCIENCE↗