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Z litijem bogati oksidi prehodnih kovin (LMR-TMO) so skupina katodnih materialov, ki se jih lahko uporablja v litij ionskih akumulatorjih. Zaradi večjega deleža litija in odsotnosti kobalta v strukturi materiala, predstavljajo LMR-TMO cenejšo in bolj zmogljivo alternativo katodnim materialom na trgu. Z magistrskim delom smo želeli uspešno uporabiti sintezni postopek, ki se ga uporablja za pridobivanje NMC katodnih materialov, za sintezo LMR-TMO materiala. Po uspešni sintezi NMC materialov, smo sintezno tehniko uporabili za pridobitev ciljnega materiala. Vzorce smo nato analizirali s pomočjo vrstične elektronske mikroskopije in rentgenske praškovne difrakcije. Sintetizirane materiale smo uporabili kot aktivni material v katodah. Sestavili smo laboratorijske akumulatorje ter jih podvrgli ciklom polnjenja in praznjenja. Z analizami smo ugotovili, da smo uspešno pridobili želene materiale, hkrati pa smo preučili kako se je material odrezal, ko smo ga uporabili v celicah. Lithium rich transition metal oxides (LMR-TMO) are a group of cathode materials, which can be used in Lithium-ion batteries. Higher lithium percentage and the lack of cobalt in the structure of the material, makes LMR-TMO cheaper and more capable alternative for cathode materials in use. In this master’s thesis, we used a modified synthesis method, which is used to attain NMC cathode materials, to produce LMR-TMO materials. After the successful acquisition of NMC dust, we used the method for the synthesis of the desired material. Samples were analysed by scanning electron microscopy and x-ray powder diffraction. Synthesised materials were used as active material in cathodes, put in battery cells, and subjected to charging cycles. By doing before mentioned analyses, we concluded, that we successfully acquired LMR-TMOs and proved they can be used in battery cells.

Namen diplomskega dela je bralcu približati MXene, družino 2D materialov, s širokim spektrom uporabe. Uvodoma sem predstavil definicijo in lastnosti MXenov. V nadaljevanju sem opisal sintezne metode, pri čemer sem se osredotočil predvsem na metodo sinteze od zgoraj navzdol, saj je le-ta najbolj raziskana in uporabljena. Komercialna uporaba opisanih materialov še ni na voljo, predvsem zaradi ekonomičnosti procesov. Kljub temu sem opisal različne primere aplikacij MXenov na več področjih, kot je na primer shranjevanje električne energije, uporaba v senzoriki in uporaba v membranskih separacijah. MXen se največkrat uporabljajo kot sestavni del kompozitov, saj je samostojna uporaba trenutno predraga ali pa premalo raziskana. V zaključku sem podal pozitivna pričakovanja glede širokega spektra uporabe MXenov na raznih področjih. The purpose of the graduation thesis is to introduce MXene, family of 2D materials, with broad application. The document begins with definition of MXenes and their properties. The remaining introduction chapters outline current production techniques, with an emphasis on the top down synthesis method, which is to date the most researched used method of production. Commercial use of the described materials is currently not available, mostly because of economy of the production. The remainder of the thesis describes the application of MXenes in multiple areas, such as energy storage, sensors and membrane separation. MXenes are usually used in composites, because their stand-alone use is currently too expensive or not explored enough. In its conclusion, the thesis presents positive expectations of a wide range of MXenes usage in different areas.