@article{MTMT:34802521,
	title = {Organic Solvent-Based Li–Air Batteries with Cotton and Charcoal Cathode},
	url = {https://m2.mtmt.hu/api/publication/34802521},
	author = {Nagy, Lajos and Üneri, Haymana Serra and Kordován, Marcell Árpád and Nagy, Tibor and Kuki, Ákos and Nyul, Dávid and Pál, Petra and Erdélyi, Zoltán and Zsuga, Miklós and Kéki, Sándor},
	doi = {10.1149/1945-7111/ad3857},
	journal-iso = {J ELECTROCHEM SOC},
	journal = {JOURNAL OF THE ELECTROCHEMICAL SOCIETY},
	volume = {171},
	unique-id = {34802521},
	issn = {0013-4651},
	abstract = {We report on the construction and investigation of Li–air batteries consisting of a charcoal cathode and cotton texture soaked with different organic solvents containing a lithium triflate (LiOTf) electrolyte. Charcoal was found to be an appropriate cathode for Li–air batteries. Furthermore, cycling tests showed stable operation at over 800 cycles when dimethyl sulfoxide (DMSO) and diethylene glycol dimethyl ether (DEGME) were used as solvents, whereas low electrochemical stability was observed when propylene carbonate was used. The charging, discharging, and long-term discharging steps were mathematically modeled. Electrochemical impedance spectroscopy showed Gerischer impedance, suggesting intensive oxygen transport at the surface of the charcoal cathode. Diffusion, charge transfer, and solid electrolyte interphase processes were identified using distribution of relaxation time analysis. In the polypropylene (PP) membrane soaked with LiOTf in DEGME, three different states of Li ions were identified by 7 Li-triple-quantum time proportional phase increment nuclear magnetic resonance measurements. On the basis of the latter results, a mechanism was suggested for Li-ion transport inside the PP membrane. The activity of the charcoal cathode was confirmed by Raman and cyclic voltammetry measurements.},
	year = {2024},
	eissn = {1945-7111},
	orcid-numbers = {Nagy, Tibor/0000-0001-8568-914X}
}

@CONFERENCE{MTMT:34272050,
	title = {Anyagba integrált adatok dekódolása DART-MS ionforrással},
	url = {https://m2.mtmt.hu/api/publication/34272050},
	author = {Pardi-Tóth, Veronika Csilla and Nagy, Tibor and Kordován, Marcell Árpád and Róth, Gergő and Nagy, Lajos and Kuki, Ákos and Zsuga, Miklós and Kéki, Sándor},
	booktitle = {XXIX. Nemzetközi Vegyészkonferencia / 29th International Conference on Chemistry},
	unique-id = {34272050},
	abstract = {A molekuláris adattárolás a hagyományos információtároló rendszerekkel azonos szerepet is képes lehet betölteni akár már napjainkban is. A tárolni kívánt információ bináris kódra történő átalakítása által a 0 illetve 1 értékek a kismolekulák hiányát vagy jelenlétét jelezik. Kutatómunkánk során olyan molekulacsoportot szintetizáltunk, amely illékonysága és termikus stabilitása révén alkalmas a kódolást követően DART-MS ionforrással történő visszaolvasásra. Habár a komponensek hasonló szerkezetűek voltak, a tömegcsúcsok intenzitásában mégis jelentős különbségek adódtak az eltérő ionizációs hatásfokok miatt. A tárolt kód hibás visszaolvasásának elkerülése érdekében a koncentrációkat úgy állítottuk be, hogy minden vegyületre hasonló intenzitást kapjunk. Az intenzitásarányok beállítását követően többféle platformon is megvalósítottuk az információ tárolását és hibamentes visszaolvasását.},
	year = {2023},
	pages = {58},
	orcid-numbers = {Nagy, Tibor/0000-0001-8568-914X}
}

@CONFERENCE{MTMT:34267869,
	title = {3D nyomtatással készült Li-levegő cellák tanulmányozása különböző szerves oldószerrel készült elektrolitok jelenlétében},
	url = {https://m2.mtmt.hu/api/publication/34267869},
	author = {Nagy, Lajos and Hayamana, Serra Üneri and Kordován, Marcell Árpád and Nagy, Tibor and Kuki, Ákos and Nyul, Dávid and Pál, Petra and Zsuga, Miklós and Kéki, Sándor},
	booktitle = {XXIX. Nemzetközi Vegyészkonferencia / 29th International Conference on Chemistry},
	unique-id = {34267869},
	year = {2023},
	pages = {53},
	orcid-numbers = {Nagy, Tibor/0000-0001-8568-914X}
}

@CONFERENCE{MTMT:34267400,
	title = {Fém-levegő akkumulátorok formatervezése és 3D nyomtatása},
	url = {https://m2.mtmt.hu/api/publication/34267400},
	author = {Kordován, Marcell Árpád and Nagy, Tibor and Nagy, Lajos and Kuki, Ákos and Üneri, Haymana Serra and Róth, Gergő and Zsuga, Miklós and Kéki, Sándor},
	booktitle = {XXIX. Nemzetközi Vegyészkonferencia / 29th International Conference on Chemistry},
	unique-id = {34267400},
	year = {2023},
	pages = {49},
	orcid-numbers = {Nagy, Tibor/0000-0001-8568-914X}
}

@article{MTMT:34218802,
	title = {Molecular data storage using direct analysis in real time (DART) ionization mass spectrometry for decoding},
	url = {https://m2.mtmt.hu/api/publication/34218802},
	author = {Pardi-Tóth, Veronika Csilla and Kuki, Ákos and Kordován, Marcell Árpád and Róth, Gergő and Nagy, Lajos and Zsuga, Miklós and Nagy, Tibor and Kéki, Sándor},
	doi = {10.1038/s41598-023-43658-x},
	journal-iso = {SCI REP},
	journal = {SCIENTIFIC REPORTS},
	volume = {13},
	unique-id = {34218802},
	issn = {2045-2322},
	abstract = {Molecular data storage is becoming a viable alternative to traditional information storage systems.
		Here, we propose a method where the presence or absence of a given molecule in a mixture of
		compounds represents a bit of information. As a novel approach, direct analysis in real time (DART)
		ionization mass spectrometry is used to recover and decode the information stored at the molecular
		level. Nicotinic acid derivatives were synthesized and used as the ‘bit compounds’. Their volatility and
		ease of ionization make these molecules especially suitable for DART-MS detection. The application
		of DART-MS as a method with an ambient ionization technique, enables the re-reading of digital
		chemical codes embedded in the material of ordinary objects. Our method is designed to store and
		read back short pieces of digital information, up to several hundred bits. These codes can have the
		function of barcodes or QR codes, as shown in our proof-of-principle applications. First, modelling
		a QR code as a link to our university’s website, three solutions were prepared, each representing 22
		bits. Proceeding further, the bit compounds were incorporated into a polymer matrix that is suitable
		for 3D printing, and a toy ship was created with a hidden barcode. In addition, decoding software
		was developed to process the DART-MS spectra. The nicotinic acid components representing the bits
		dominated the DART-MS spectra and error-free decoding was achieved.},
	year = {2023},
	eissn = {2045-2322},
	orcid-numbers = {Nagy, Tibor/0000-0001-8568-914X}
}

@CONFERENCE{MTMT:34071297,
	title = {Új irányok a környezetbarát fém-levegő akkumulátorok fejlesztésében},
	url = {https://m2.mtmt.hu/api/publication/34071297},
	author = {Kuki, Ákos and Nagy, Tibor and Nagy, Lajos and Deák, György and Kordován, Marcell Árpád and Róth, Gergő and Zsuga, Miklós and Kéki, Sándor},
	booktitle = {XXVIII. Nemzetközi Vegyészkonferencia = 28th International Conference on Chemistry},
	unique-id = {34071297},
	year = {2022},
	pages = {30-31},
	orcid-numbers = {Nagy, Tibor/0000-0001-8568-914X}
}

@CONFERENCE{MTMT:33728889,
	title = {Környezetbarát akkumulátorok fejlesztése 3D nyomtatással támogatva = Development of environmentally friendly secondary battery supported by 3D printing technology},
	url = {https://m2.mtmt.hu/api/publication/33728889},
	author = {Kordován, Marcell Árpád and Nagy, Tibor and Nagy, Lajos and Kuki, Ákos and Erdélyi, Zoltán and Baradács, Eszter and Deák, György and Zsuga, Miklós and Kéki, Sándor},
	booktitle = {XXVIII. Nemzetközi Vegyészkonferencia = 28th International Conference on Chemistry},
	unique-id = {33728889},
	abstract = {A megfelelő hatékonyságú akkumulátorok fejlesztése elengedhetetlen a megújuló energiaforrások szé-leskörű elterjedésének. A kutatásunkkal célunk volt egy olyan akkumulátor megalkotása, amely széles-körű alkalmazhatósággal rendelkezik. A munka során egy olyan fém-levegő (lítium, cink vagy sárgaréz) cellát hoztunk létre, amelyben a felhasznált komponensek könnyen hozzáférhetőek. A cella kialakításá-nak reprodukálhatósága céljából, a váz elemeket 3D nyomtató segítségével készítettük el polipropilén-ből. A katódként  aktív  szenet alkalmaztunk  egy  grafit  kollektorral ellátva,  nehézfémeket és és  egyéb katalizátort ez nem tartalmazott. A cellában lévő diafragma természetes alapú pamutszövet, valamint celofán voltak. A fém-levegő rendszerek elterjedésének hiánya a nagymennyiségű dendritképződésre vezethető vissza, amely csökkentette annak energiahatékonyságát. Különböző elektrolit adalékokat (pl. karboxil telekelikus PEG) teszteltünk, amelyek alkalmazásával sikeresen visszaszorítottuk a dendritkép-ződést.
		The development of batteries with high efficiency is crucial for storing energy from renewable sources. Our research aimed to create a battery with a wide range of applications. During the work, we created a metal-air (lithium, zinc, brass) cell in which the used chemicals and components are easily accessible. In order to ensure a reproducible backbone, the parts were made using 3D printing. The cathode was charcoal equipped with a graphite collector. The diaphragm in the cell was also a natural-based cotton fabric as well as cellophane. The lack of spread of metal-air systems is due to the formation of a sig-nificant amount of dendrite, which  reduces its  energy efficiency. Different electrolyte  additives were tested and with the application of them the dendrite formation was successfully suppressed.},
	keywords = {DENDRITE; CELLULOSE DERIVATIVES; 3D nyomtatás; fém-levegő akkumulátor; cellulózszármazékok; metal-air secondary batter},
	year = {2022},
	pages = {29-30},
	orcid-numbers = {Nagy, Tibor/0000-0001-8568-914X}
}

@article{MTMT:33042359,
	title = {Novel Polyurethane Scaffolds Containing Sucrose Crosslinker for Dental Application},
	url = {https://m2.mtmt.hu/api/publication/33042359},
	author = {Kordován, Marcell Árpád and Hegedűs, Csaba and Czifrák, Katalin and Lakatos, Csilla and Kálmán-Szabó, Ibolya and Daróczi, Lajos and Zsuga, Miklós and Kéki, Sándor},
	doi = {10.3390/ijms23147904},
	journal-iso = {INT J MOL SCI},
	journal = {INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES},
	volume = {23},
	unique-id = {33042359},
	issn = {1661-6596},
	abstract = {In this paper, the synthesis, characterization, and properties of crosslinked poly(ε-caprolactone)-based polyurethanes as potential tissue replacement materials are reported. The polyurethane prepolymers were prepared from poly(ε-caprolactone)diol (PCD), polyethylene glycol (PEG)/polylactic acid diol (PLAD), and 1,6-hexamethylene diisocyanate (HDI). In these segmented polyurethanes, the role of PEG/PLAD was to tune the hydrophobic/hydrophilic character of the resulting polymer while sucrose served as a crosslinking agent. PLAD was synthesized by the polycondensation reaction of D,L-lactic acid and investigated by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) and nuclear magnetic resonance spectroscopy (NMR). The crosslinked polyurethane samples (SUPURs) obtained were characterized by attenuated total reflectance Fourier-transform infrared spectroscopy (AT-FT-IR), swelling, and mechanical (uniaxial tensile tests) experiments. The thermo and thermomechanical behavior were studied by differential scanning calorimetry (DSC) and dynamical mechanical analysis (DMA). The viability of dental pulp stem cells was investigated in the case of polyurethanes composed of fully biocompatible elements. In our studies, none of our polymers showed toxicity to stem cells (DPSCs).},
	year = {2022},
	eissn = {1422-0067},
	orcid-numbers = {Hegedűs, Csaba/0000-0003-4143-2507; Kéki, Sándor/0000-0002-5274-6117}
}

@article{MTMT:32699605,
	title = {Synthesis of Sucrose-HDI Cooligomers: New Polyols for Novel Polyurethane Networks},
	url = {https://m2.mtmt.hu/api/publication/32699605},
	author = {Lakatos, Csilla and Kordován, Marcell Árpád and Czifrák, Katalin and Nagy, Lajos and Vadkerti, Bence and Daróczi, Lajos and Zsuga, Miklós and Kéki, Sándor},
	doi = {10.3390/ijms23031444},
	journal-iso = {INT J MOL SCI},
	journal = {INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES},
	volume = {23},
	unique-id = {32699605},
	issn = {1661-6596},
	year = {2022},
	eissn = {1422-0067}
}

@CONFERENCE{MTMT:32909798,
	title = {Biokompatibilis építőelemeket tartalmazó poliuretánok előállítása és biológiai vizsgálata},
	url = {https://m2.mtmt.hu/api/publication/32909798},
	author = {Kordován, Marcell Árpád and Hegedűs, Csaba and Czifrák, Katalin and Lakatos, Csilla and Kálmán-Szabó, Ibolya and Zsuga, Miklós and Kéki, Sándor},
	booktitle = {XXVII. Nemzetközi Vegyészkonferencia / 27th International Conference on Chemistry},
	unique-id = {32909798},
	year = {2021},
	pages = {ISSN-L 1843-6293}
}