Facilitated synthesis of mg2ni based composites with attractive hydrogen sorption properties
| Autor: | Pavel Markov, Stanislava Todorova, Petar Tzvetkov, Tony Spassov, Eli Grigorova |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Hydrogen Annealing (metallurgy) 020209 energy Intermetallic chemistry.chemical_element 02 engineering and technology lcsh:Technology Article materials hydrogen storage Hydrogen storage Mg2Ni based composite Ni/MH battery 0202 electrical engineering electronic engineering information engineering medicine General Materials Science Composite material lcsh:Microscopy complex hydride Mg2NiH4 Ball mill Powder mixture lcsh:QC120-168.85 lcsh:QH201-278.5 lcsh:T 021001 nanoscience & nanotechnology chemistry lcsh:TA1-2040 lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering Particle size lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology lcsh:TK1-9971 Activated carbon medicine.drug |
| Zdroj: | Materials Volume 14 Issue 8 Materials, Vol 14, Iss 1936, p 1936 (2021) |
| Popis: | Composites based on Mg2Ni with 5% activated carbon from apricot stones (ACAP) have been prepared by ball milling and subsequent annealing in hydrogen atmosphere. The purpose of the primary metal (Mg, Ni, and V) milling was to reduce the particle size and achieve a good contact between them, without forming intermetallic compounds. During hydriding/dehydriding at 300 °C the amount of the Mg2Ni phase progressively increased, and after 10 cycles about 50% Mg2(Ni,V) was achieved. The hydrogenation produced mainly Mg2NiH4, but small amounts of MgH2 and VHx were also detected in the powder mixture. Relatively high hydrogen storage capacity and fast hydriding/dehydriding kinetics of the Mg2.1Ni0.7V0.3—5 wt.% ACAP composite were determined both from hydrogen gas phase and electrochemically. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|