0
RESEARCH PAPERS

Development of Stabilized NiO Cathodes for Molten Carbonate Fuel Cell

[+] Author and Article Information
B. H. Ryu1

Fuel Cell Development Team,  Corporate R and D Institute, Doosan Heavy Industries and Construction 58-4 Hwaam-Dong, Yuseong-Gu, Daejeon 305-348, Koreabohyun.ryu@doosan.com

I. G. Jang, K. H. Moon

Fuel Cell Development Team,  Corporate R and D Institute, Doosan Heavy Industries and Construction 58-4 Hwaam-Dong, Yuseong-Gu, Daejeon 305-348, Korea

J. Han, T.-H. Lim

Fuel Cell Research Center,  Korea Institute of Science and Technology, Seoul 130-650, South Korea

1

Corresponding author.

J. Fuel Cell Sci. Technol 3(4), 389-395 (Mar 12, 2006) (7 pages) doi:10.1115/1.2349518 History: Received November 24, 2005; Revised March 12, 2006

The stabilized NiO cathodes were fabricated by LiCoO coated Ni powder which was synthesized by hydrothermal treatment in 46MLiOHH2O. The morphology of LiCoO coating was characterized by spectroscopic techniques to investigate the optimal synthesis conditions such as temperature, reaction time, and reactant molarity. LiCoO coating was consisted of LiCoO2, Co(OH)2, and CoOOH, and the amount of LiCoO2 was increased with increasing time and molarity of LiOHH2O. The mechanical properties of the stabilized NiO cathodes were also measured to evaluate the stability in molten carbonate fuel cell (MCFC) applications. The bending strength of the stabilized cathode was significantly improved compared to the typical NiO cathode. The pores of the stabilized cathode showed typical bimodal distribution in size due to the micropores developed by coated materials, and the overall porosity was higher than 75% under optimal synthesis conditions, which is also promising for MCFC applications.

FIGURES IN THIS ARTICLE
<>
Copyright © 2006 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Fabrication process of stabilized cathode

Grahic Jump Location
Figure 2

SEM images of LCO‐Ni powder synthesized as a function of the concentration of LiOH∙H2O at 150°C for 2h under the oxygen pressure of 5.6bar; 4M(a) and (b), 5M(c) and (d), and 6M(e) and (f)

Grahic Jump Location
Figure 3

XRD profiles of LCO‐Ni powder synthesized as a function of the LiOH concentration (M); commercial LiCoO2 powder (i), 4M (ii), 5M (iii), and 6M (iv); (o)Li‐Co‐O, (●)β‐Co(OH)2, (*) Ni

Grahic Jump Location
Figure 4

micro-Raman spectra excited at 514.5nm of LCO‐Ni powder synthesized as a function of the concentration of LiOH∙H2O of (i) 4M (ii) 5M, and (iii) 6M; β‐Co(OH)2 (*) and mixed impurity (∎)

Grahic Jump Location
Figure 5

XRD profiles of LCO‐Ni powder synthesized as a function of the mass ration of Co to Ni (wt%); commercial LiCoO2 powder (i), 5wt% (ii), 10wt% (iii) and 14wt% (iv); (o)Li‐Co‐O, (●)β‐Co(OH)2, (▴)CoOOH, (*) Ni

Grahic Jump Location
Figure 6

Pore size distribution of the stabilized cathode made of LCO‐Ni powder, sintered at 800°C in the reduction gas condition

Grahic Jump Location
Figure 7

SEM images of pure Ni cathode and stabilized cathodes; 0wt%(a) and (b), 5wt% Co (c) and (d), 10wt% Co (e) and (f) and 14wt% Co (g) and (h)

Grahic Jump Location
Figure 8

Cobalt distribution in stabilized cathodes prepared by LCO‐Ni powder; 5wt%(a) and (b), 10wt%(c) and (d) and 14wt%(e) and (f)

Grahic Jump Location
Figure 9

XRD patterns of stabilized cathodes, sintered at 800°C in the reduction gas condition; (i) 5wt% Co, (ii) 10wt% Co, (iii) 15wt% Co

Grahic Jump Location
Figure 10

Stress-strain behavior of porous Ni plates with various mass ratio of Co to Ni

Grahic Jump Location
Figure 11

Three-point bending strength of cathodes as a function of the mass ratio of Co to Ni

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In