magistrsko delo
Urban Košir (Author), Robert Dominko (Mentor), Marjan Marinšek (Thesis defence commission member), Miran Gaberšček (Thesis defence commission member)

Abstract

Aluminij-organski akumulatorji so zaradi visoke dostopnosti komponent in posledične nizke cene, konkurenčen kandidat na področju elektrokemijskega shranjevanja energije. Aluminij odlikuje tako visoka gravimetrična, kot tudi volumetrična teoretična kapaciteta. Ozko grlo trenutnih aluminijevih akumulatorjev, predstavlja izbira elektrolitov in pozitivnih elektrodnih materialov. Med elektroliti so zaenkrat najboljše elektrokemijsko delovanje izkazale ionske tekočine na osnovi aluminijevega klorida in 1-etil-3-metilimidazolijevega klorida, med pozitivnimi elektrodnimi materiali pa organski materiali. V magistrskem delu smo se lotili študije elektrokemijskega mehanizma Al-fenantrenkinon akumulatorskega sistema. Z ex situ in operando IR-spektroskopskimi meritvami smo potrdili dvoelektronsko redukcijo fenantrenkinona, s pomočjo ex situ XPS, SEM-EDS in MAS NMR meritev, pa dokazali, da pri elektrokemijskem mehanizmu delovanja takšnega akumulatorja, večinsko sodelujejo [AlCl]2+ zvrsti iz elektrolita. Dobro razumevanje delovanja je bistvenega pomena, saj količina klorida v koordinirajočem kationu bistveno vpliva na anodno kapaciteto, število sprejetih elektronov pa na katodno.

Keywords

elektrokemijski sistemi;elektrokemijske celice;aluminij-organski akumulator;fenantrenkinon;elektrokemijski mehanizem delovanja;magistrska dela;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher: [U. Košir]
UDC: 621.355(043.2)
COBISS: 112013315 Link will open in a new window
Views: 159
Downloads: 12
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Other data

Secondary language: English
Secondary title: A study of the electrochemical mechanism in aluminium organic battery
Secondary abstract: Due to the high availability of components and the consequent low price, aluminum-organic batteries are a competitive candidate in the field of electrochemical energy storage. Aluminum has both high gravimetric and volumetric theoretical capacity. The bottleneck of current aluminum batteries is the choice of electrolytes and positive electrode materials. Among electrolytes, ionic liquids based on aluminum chloride and 1-ethyl-3-methylimidazolium chloride have so far shown the best electrochemical performance, while organic materials were demonstrated as the best electrode materials. In this master's thesis we studied the electrochemical mechanism of Al-phenanthrenquinone battery system. Two-electron reduction of phenanthrenequinone was confirmed by ex situ and operando IR spectroscopic measurements and ex situ XPS, SEM-EDS and MAS NMR measurements were used to conclude that [AlCl]2+ species from the electrolyte are mostly involved in the electrochemical mechanism of this battery. A good understanding of the operation is essential, as the amount of chloride in the coordinating cation significantly affects the anode capacity and the number of electrons received affects the cathode capacity.
Secondary keywords: aluminium-organic battery;phenanthrenequinone;electrochemical mechanism;Akumulatorji;Univerzitetna in visokošolska dela;
Type (COBISS): Master's thesis/paper
Study programme: 1000376
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, smer Kemijsko inženirstvo
Pages: 71 str.
ID: 15634908