Influence of the composition of lithium-based alloys, non-aqueous electrolytes and cycling conditions on the anode properties
| Autor: | V.V. Rozhkov, Elena Shembel, Irina M Maksyuta, L.I. Neduzhko, A.I. Belosokhov, A.F. Naumenko |
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| Rok vydání: | 1995 |
| Předmět: |
Materials science
Passivation Renewable Energy Sustainability and the Environment Inorganic chemistry Alloy Energy Engineering and Power Technology chemistry.chemical_element Electrolyte engineering.material Cathode Anode law.invention chemistry Aluminium law engineering Electrical and Electronic Engineering Physical and Theoretical Chemistry Ternary operation Dissolution |
| Zdroj: | Journal of Power Sources. 54:416-420 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/0378-7753(94)02114-i |
| Popis: | The reversible work of a lithium-based anode in non-aqueous electrolytes of different compositions has been investigated. The electrochemical properties of anodes of Li, binary LiAl alloys, ternary LiAlCd, LiAlSi, LiAlBi alloys were compared. The concentration range of aluminium in the alloys was used in accordance with a binary constitutional diagram. In a series of binary alloys with an Al content 5, 16.8, and 22.5 mass%, in the process of anode ‘ageing’, the alloy containing 16.8 mass% Al is passivated to a greater extent. Hence, cycling efficiency of lithium deposits changed. The increase in charge-current density and the discharge-current density decrease raise the efficiency of lithium deposits. Comparison of the results of impedance measurements and galvanostatic cycling showed that the efficiency of galvanostatic cycling is higher when the active component of impedance is lower. The polarization of cathode process (deposition) and anode process (dissolution) decreases significantly in a series of lithium anodes: anodes on the basis of binary LiAl alloys and anodes based on ternary alloys. Lithium insertion into the structure of ternary alloys proceeds considerably easier than into lithium or binary lithium-aluminium alloy structures. It may be conditioned by the binary alloy passivation in the electrolyte and by the less passivating film resistance on the ternary alloys. |
| Databáze: | OpenAIRE |
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