Registration Number
0221U105912,
0120U104880
, R & D reports
Title
Development of new functional materials for the needs of hydrogen energy
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Head
Zavalii Ihor Yu., Доктор хімічних наук
Registration Date
09-09-2021
Organization
Physico-Mechanical Institute named after GV Karpenko of the National Academy of Sciences of Ukraine
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A series of magnesium based composites with nano-ТіО2, TiN, ZrN, CNT as additives have been synthesized by reactive ball milling under hydrogen atmosphere. Their phase content is established by means of XRD, SEM and EDS analyses. It was shown, that above mentioned composite materials can be used in the hydrolysis devices for hydrogen generation. Hydrogen generation rate of 100 mL/min at room temperature for the MgH2 – 10 wt.% ZrN composite is enough for the 10 W fuel cell performance.
For the proposed 50% (ZrO2 – 4 mol. % Y2O3 + 2 wt. % Al2O3) - 50% (NiO + 5 wt. % CuO) ceramic system no negative impact of CO2 impurities in the technological reducing medium of fuel cells was detected. Reducing the Y2O3 oxide content from the traditional 8% to 4% provided a relatively high level of strength of this ceramic in the initial and reduced states. Therefore, a new high-strength anode material of the 50 (ZrO2-Y2O3-Al2O3) - 50 (NiO-CuO) system has been developed. Last one is insensitive to the negative effects of CO2 impurities.
PhMI NASU together with subcontractors IPM and INM NASU optimized the conditions for obtaining Ba7Nb4MoO20 based perovskites with the lowest possible content of impurity phases. In particular, it is shown that solid-phase synthesis must be carried out with an excess of BaCO3 (up to 1 wt.% of its total content) in the 1060–1080 оС temperature range.
Technological modes of obtaining targets of the MAX phases from the Ti-Al-C system for the application of functional coatings of thin-walled interconnects are proposed. It is established that the change of technological parameters of obtaining composite material on the basis of MAX phases; the increase of pressure during hot pressing from 15 to 20 MPa affects the structural features of the composite. This leads to the formation of more (100 %) 2 types of MAX phases, namely, Ti2AlC and Ti3AlC2, and the absence of TiC.
Product Description
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Berezovets Vasyl V.
Zavaliy Ihor Yu.
Kononyuk Oleksandr P.
Kordan Vasyl M.
Lavrysʹ Serhiy M
Ostash Orest P
Podhursʹka Viktoriya Ya
Shylo Artem V.
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2021-09-09
