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Materials for SOFC technologies Franciszek Krok Faculty of Physics, Warsaw University of Technology.

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Presentation on theme: "Materials for SOFC technologies Franciszek Krok Faculty of Physics, Warsaw University of Technology."— Presentation transcript:

1 Materials for SOFC technologies Franciszek Krok Faculty of Physics, Warsaw University of Technology

2 Scientific network: Sustainable Energy Systems Partners: Warsaw University of Technology (PW), Warszawa - Faculty of Physics (WF PW) - Faculty of Chemistry (WCh PW) Academy of Mining and Metallurgy (AGH), Kraków - Faculty of Materials Science and Ceramics (WIMiC AGH) Technical University of Gdańsk (PG), Gdańsk - Faculty of Applied Physics and Mathematics (FTiMS PG) - Faculty of Chemistry (WCh PG) Technical University of Poznań (PP), Poznań - Faculty of Electrical Engeenering (WE PP) Polish Academy of Science (PAN) - Institute of Molecular Physics (IFM), Poznań - Institute of Low Temperature and Structure Research (INTiBS), Wrocław - Institute of Physical Chemistry (ICHF), Warszawa Thematic subnet: Energy conversion and storage

3 Thematic Subnet: ENERGY CONVERSION AND STORAGE Research activity: In general the area of interest is concentated on topics closley related to novel materials used in energy conversion and storage devices. The new ionic conductors are studied in terms of their application as potential solid electrolytes in fuel cells and lithium and lithium ion batteries. Also the mixed ionic-electronic conductors are studied as potential electrode materials in these devices solid electrolytes: oxide ion conductors (WF PW) lithium ion conductors (WCh PW, WCh PG, WF PW) protonic conductors (WCh PW, WF PW, IFM PAN, INTiBS PAN) electrode materials(WIMiC AGH, FTIMS PG, WF PW, ICHF PAN) TYPE OF MATERIALS: crystalline, glasses, nanomaterials, polymers, gels

4 Thematic Subnet: ENERGY CONVERSION AND STORAGE CEPHOMA WF PW SMART WF PW GETRADEE WE PP PROCO IFM PAN GLASSIC FTiMS PG SELIBAT AGH OBAST INTiBS PAN ALISTAR WCh PW European Projects

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6 CEPHOMA: Project scope and goals Challenges CEPHOMA activity is concentrated on topics closely related to novel materials used in energy conversion and storage devices. Two main pillars of that activity are: photovoltaics (conversion of solar energy to electricity) and solid state ionics (conversion of chemical energy to electrical one or vice versa). Objectivities The main objective of the CEPHOMA Centre is to promote closer cooperation of scientists from Poland and other EU countries, active in the field of photovoltaics and physics of materials for novel energy sources. Important aspect of the Centre activity is its networking to leading EU research institutions within European Research Area (ERA) to enable joining projects within the 6 th Framework Programme of the European Union. Very important goal of the Centre is training of PhD students and young scientists in Centres as well as partners laboratories.

7 SOFC Configuration: Planar Tubular (Siemens-Westinghouse) General requirements: Electrolyte – nonporous material, pure ionic conductivity Electrodes – porous material, mixed ionic and electronic conductivity Interconnector – electronic conductor

8 SOFC Target: 1 kW/ l and 1 kW/kg ASR (combined area specific resistivity) < 0.5 Ω cm 2 Ideally 0.1 Ωcm 2

9 HT SOFC (~1000 o C) electrolyte Zr(Y)O 2 (YSZ) cathode La(Sr)MnO 3 (LSM) anodeNi - YSZ interconectorLa(Sr)CrO 3 IT SOFC (500 – 700 o C) 1) Based on YSZ electrolyte: thin layer YSZ (eg.15μm 0.15 Ω cm 2 at 700 o C) 2) Based on alternative electrolyte materials: a) Ce(Gd)O 2 – (CGO) (15 μm 0.15 Ω cm 2 at 500 o C) problems: reduction ( Ce 4+ Ce 3+ ) electronic conductivity matching (eg. anode Ni – CGO) b) La(Sr)Ga(Mg)O 3 – (LSGM) problems: difficulties to get single phase c) Bi 2 O 3 based oxide ion conductors problems: reduction at low p O2 atmosphere SOFC

10 Bi - based oxide ion conductors

11 Fluoryte type cubic structure MO 2 (eg. ZrO 2 ) Zr 1-x Ca x O 2-x () x Zr 1-x Y x O 2-3/2x () x Bi O

12 Mo Bi O3O3 O2O2 O1O1 Bi 2 O 3 + MoO 3 Bi 2 MoO 6 (Bi 2 O 2 ) 2+ (MoO 4 ) 2- Bi 2 O 3 + V 2 O 5 Bi 2 VO 5.5 (Bi 2 O 2 ) 2+ (VO ) 2-

13 INTERNATIONAL COOPERATION 1.Structural Chemistry Group, Queen Mary, University of London, UK 2.Department of Chemistry, University of Surrey, UK 3.Laboratoire de Cristallochemie et Physicochemie du Solide Ecole Nationale Superiere de Lille, France 4.Delft Institute for Sustainable Energy, Delft University of Technology, The Netherlands 5.Institute fur Technishe Eelectrochemie und Festkorperchemie, Technische Universitat Wien, Austria 6.Institute fur Physicalische Chemie, Universitat Munster, Germany


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