BROWSE

Related Researcher

Author

Liu, Meilin
Liu Research Group
Research Interests
  • Fuel Cells

ITEM VIEW & DOWNLOAD

From Ni-YSZ to sulfur-tolerant anode materials for SOFCs: electrochemical behavior, in situ characterization, modeling, and future perspectives

Cited 68 times inthomson ciCited 51 times inthomson ci
Title
From Ni-YSZ to sulfur-tolerant anode materials for SOFCs: electrochemical behavior, in situ characterization, modeling, and future perspectives
Author
Cheng, ZheWang, Jeng-HanChoi, YongManYang, LeiLin, M. C.Liu, Meilin
Keywords
Alternative anodes; Anode material; Anode surfaces; Available fuels; Computational framework; Critical challenges; Density functional theory calculations; Different scale; Electrochemical behaviors; Electrode surfaces; Ex situ; Experimental approaches; Experimental methods; Experimental observation; Future perspectives; In-situ; In-situ characterization; Multiscales; New directions; Rational design; Rigorous validation; SOFC system; Sulfur poisoning; SULFUR tolerance; Sulfur-containing compounds; Sulfur-tolerant anode material; Theoretical prediction
Issue Date
201111
Publisher
ROYAL SOC CHEMISTRY
Citation
ENERGY & ENVIRONMENTAL SCIENCE, v.4, no.11, pp.4380 - 4409
Abstract
Solid oxide fuel cells (SOFCs) offer great promise for the most efficient and cost-effective conversion to electricity of a wide variety of fuels such as hydrocarbons, coal gas, and gasified carbonaceous solids. However, the conventional Ni-YSZ (yttria-stabilized zirconia) anode is highly susceptible to deactivation (poisoning) by contaminants commonly encountered in readily available fuels, especially sulfur-containing compounds. Thus, one of the critical challenges facing the realization of fuel-flexible and cost-effective SOFC systems is the development of sulfur-tolerant anode materials. This perspective article aims at providing a comprehensive review of materials that have been studied as anodes for SOFCs, the electrochemical behavior of various anode materials in H2S-contaminated fuels, experimental methods for ex situ and in situ characterizations of species and phases formed on anode surfaces upon exposure to H2S-containing fuels, mechanisms for the interactions between H2S and anode surfaces as predicted from density functional theory (DFT) calculations, and possible strategies of minimizing or eliminating the effect of sulfur poisoning. While significant progress has been made in developing alternative anode materials with better sulfur tolerance, in probing and mapping electrode surface species relevant to sulfur poisoning, and in unraveling the mechanisms of H2S-anode interactions using both computational and experimental approaches, many challenges still remain to bridge the gaps between models at different scales or between theoretical predictions and experimental observations. An important new direction for future research is to develop a predictive multiscale (from DFT to continuum) computational framework, through a rigorous validation at each scale by carefully-designed experiments performed under in situ conditions, for rational design of better sulfur-tolerant anode materials and structures for a new generation of SOFCs to be powered by readily available fuels.
URI
Go to Link
DOI
http://dx.doi.org/10.1039/c1ee01758f
ISSN
1754-5692
Appears in Collections:
ECHE_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU