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master's thesis
Određivanje elektrokemijskih svojstava Li-polimer galvanskih članaka
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2021. urn:nbn:hr:149:760557
Mihaljević, Nikola
University of Zagreb
Faculty of Chemical Engineering and Technology

Institutional repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb

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Mihaljević, N. (2021). Određivanje elektrokemijskih svojstava Li-polimer galvanskih članaka (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:760557

Mihaljević, Nikola. "Određivanje elektrokemijskih svojstava Li-polimer galvanskih članaka." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2021. https://urn.nsk.hr/urn:nbn:hr:149:760557

Mihaljević, Nikola. "Određivanje elektrokemijskih svojstava Li-polimer galvanskih članaka." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2021. https://urn.nsk.hr/urn:nbn:hr:149:760557

Mihaljević, N. (2021). 'Određivanje elektrokemijskih svojstava Li-polimer galvanskih članaka', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 25 November 2024, https://urn.nsk.hr/urn:nbn:hr:149:760557

Mihaljević N. Određivanje elektrokemijskih svojstava Li-polimer galvanskih članaka [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2021 [cited 2024 November 25] Available at: https://urn.nsk.hr/urn:nbn:hr:149:760557

N. Mihaljević, "Određivanje elektrokemijskih svojstava Li-polimer galvanskih članaka", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:149:760557

Metadata
TitleOdređivanje elektrokemijskih svojstava Li-polimer galvanskih članaka
Title (english)Electrochemical characterization of Li-polymer batteries
AuthorNikola Mihaljević
MentorZoran Mandić (mentor)
Committee memberZoran Mandić (predsjednik povjerenstva)
Committee memberHelena Otmačić Ćurković (član povjerenstva)
Committee memberVladimir Dananić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2021-09-23, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Elektrokemijska impedancijska spektroskopija i metoda diferencijalnog kapaciteta su korištene u ovom radu u svrhu istraživanja degradacijskih mehanizama litij-ionskih galvanskih članaka. Testiranja su provođena na odabranom litij-polimernom galvanskom članku (model Cellevia LP402030) nominalnog kapaciteta 190 mA h. Degradacija članka je provođena sukcesivnim punjenjem i pražnjenjem u rasponu napona 2,75 – 4,2 V kroz 300 ciklusa. Nakon svakih 50 ciklusa konstruiran je Ragoneov graf, snimljeni impedancijski spektri te snimljena krivulja ovisnosti diferencijalnog kapaciteta o naponu. Rezultati su pokazali da se opetovanim punjenjem i pražnjenjem galvanski članak degradira. Kao uzrok degradacije identificiran je nastanak i rast međusloja čvrstog elektrolita (SEI) u koji se ugrađuju litijevi ioni iz elektrolita te dovode do otežane difuzije litijevih iona iz elektrolita do elektrode i obrnuto.
Abstract (english)
Electrochemical impedance spectroscopy and differential capacity – incremental voltage (dc-iv) were used in this work for the identification of the degradation mechanisms of the li-ion batteries. The testings were carried out on the selected Li-polymer cell (model Cellevia LP402030) with capacity of 190 mA h. Degradation of the cell was performed by the successive charging/discharging through 300 cycles in the voltage range between 2,75 – 4,2 V. After each 50 cycles the cycling was stopped and the Ragone plot was constructed, impedance spectrum taken and the dc-iv curve recorded. The obtained results showed that charging/discharging process results in the degradation of the cell. The formation and the growth of the solid-electrolyte interphase (SEI) was identified as the main cause of the performance deterioration as a result of the incorporation of lithium ions in the SEI layer and hindered diffusion of lithium ions through it.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:760557
Study programmeTitle: Applied Chemistry - Graduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry
Course: Environmental chemistry and green technologies
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra primijenjene kemije (magistar/magistra primijenjene kemije)
Type of resourceText
File originBorn digital
Access conditionsAccess restricted to students and staff of home institution
Terms of useLicence In copyright icon
Created on2023-04-14 12:31:01