| | SLO | ENG | Cookies and privacy

Bigger font | Smaller font
First page > Show document

Show document Help

Title:Razvoj elektroprevodnih tekstilnih materialov, modificiranih z MXeni za elektrokemično shranjevanje energije : doktorska disertacija
Authors:ID Jug, Laura (Author)
ID Ojstršek, Alenka (Mentor) More about this mentor... New window
Files:.pdf DOK_Jug_Laura_2026.pdf (12,51 MB)
MD5: CD07CAC2E10ED38E57AD6D5E5E9362CB
 
Language:Slovenian
Work type:Doctoral dissertation
Typology:2.08 - Doctoral Dissertation
Organization:FS - Faculty of Mechanical Engineering
Abstract:Elektroprevodne tekstilije imajo velik potencial pri razvoju nosljivih elektronskih naprav, vendar je njihova širša uveljavitev omejena zaradi pomanjkanja napajalnih virov, ki bi bili dovolj prožni, stabilni in dovolj zmogljivi. V zadnjem času je bil narejen velik napredek pri razvoju fleksibilnih tekstilnih superkondenzatorjev, ki so funkcionalizirani z nanodelci, zlasti Ti₃C₂Tₓ MXeni, ki imajo visoko električno prevodnost, specifično kapacitivnost in združljivost z različnimi tekstilnimi substrati. Kljub dobrim lastnostim njihova implementacija ostaja zahtevna zaradi neenakomernega nanosa delcev, njihovega medsebojnega zlaganja, omejene zmogljivosti ter nezadostne obstojnosti na tekstilnih substratih, kar predstavlja pomemben raziskovalni izziv pri razvoju naprednih napajalnih rešitev za t. i. pametne tekstilije. Doktorska disertacija se osredotoča na razvoj elektroprevodnih tekstilnih materialov, modificiranih z nanodelci Ti₃C₂Tₓ MXenov, ki so namenjeni uporabi v fleksibilnih elektrokemičnih hranilnikih energije. V primerjavi z referenčnimi študijami, kjer za sintezo, kot prekurzor, uporabljajo MAX fazo manjših dimenzij (40 µm), smo v naši raziskavi sintetizirali Ti₃C₂Tₓ MXen nanodelce iz MAX faze večjih dimenzij (100 µm) s spremenjenimi pogoji jedkanja. Pripravljeni 2D nanodelci so tvorili stabilne koloidne disperzije (ζ-potencial ≤ −40 mV), ki so bile primerne za nanos na celulozno tkanino. Z optimizacijo procesa smo pripravili delce večjih dimenzij (hidrodinamični premer do 2723 nm v primerjavi s 1422 nm pri referenci), povečali smo stabilnost disperzij (48-odstotno znižanje absorbance po 30 dneh v primerjavi z 68 % pri referenci) ter izboljšali izkoristek in električno prevodnost (12,3 kS/cm v primerjavi z 8,6 kS/cm pri referenčnem vzorcu). Z nanosom Ti₃C₂Tₓ MXen nanodelcev na bombažno tkanino po postopku omakanja smo proučevali vpliv velikosti delcev na njihovo porazdelitev po površini tkanine in električno prevodnost modificiranih tkanin. Z meritvami kontaktne profilometrije in električnega upora smo pokazali, da večji delci, pripravljeni pri optimiziranih pogojih jedkanja, omogočajo oblikovanje bolj homogenega in bolj prevodnega sloja. Proučili smo obstojnost nanosa po več ciklih pranja (do 20-krat) ter dokazali, da uporaba polimernih zaščitnih premazov (PUR, AR, TECT) izboljša obstojnost delcev, ne da bi pri tem močno poslabšala fleksibilnost in funkcionalnost tekstilij. Z vnosom HrGO in LAW med MXen plasti ali s termično obdelavo MXen tekstilnih elektrod smo zmanjšali zlaganje MXen delcev, kar je vodilo do povečanega razmaka med delci, večje specifične površine ter boljše elektrokemične dostopnosti aktivnih mest. Na podlagi elektrokemične karakterizacije smo z metodami CV, GCD in EIS pokazali, da MXen/tekstilne elektrode izkazujejo psevdokapacitivnost, pri čemer je bila njihova zmogljivost odvisna od uporabljenih postopkov obdelave. Z vključevanjem HrGO in LAW med MXen plasti smo povečali kapacitivno stabilnost pri večji hitrosti skeniranja, medtem ko smo s termično obdelavo MXen/tekstilnih elektrod v atmosferi amonijaka pri 700 °C dosegli več kot trikratno povečanje specifične kapacitivnosti (1,373 F/cm² v primerjavi z 0,38 F/cm² pri osnovni elektrodi). Kot končni rezultat smo razvili simetričen superkondenzator (SCS6-700) z gostoto energije 14,45 μWh/cm² ter s tem dokazali, da imajo razvite MXen/tekstilne elektrode velik potencial kot elektrokemične komponente za napajanje nosljivih elektronskih naprav.
Keywords:sinteza Ti₃C₂Tₓ MXen nanodelcev, elektroprevodne tekstilije, superkondenzator, elektrokemična karakterizacija, shranjevanje energije
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[L. Jug]
Year of publishing:2025
Number of pages:XXII, 169 str.
PID:20.500.12556/DKUM-95065 New window
UDC:669.21/.23.017.16:54-172(043.3)
COBISS.SI-ID:266348547 New window
Publication date in DKUM:16.01.2026
Views:192
Downloads:36
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FS
:
Copy citation
  
Average score:(0 votes)
Your score:Voting is allowed only for logged in users.
Share:Bookmark and Share



Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:03.09.2025

Secondary language

Language:English
Title:Development of electrically conductive textile materials modifield with MXenes for electrochemical energy storage applications
Abstract:Electrically conductive textiles hold great potential for the development of wearable electronic devices, but their broader adoption remains limited due to the lack of power sources that are sufficiently flexible, stable, and powerful. Recently, significant progress has been made in developing flexible textile supercapacitors functionalized with nanoparticles, particularly Ti₃C₂Tₓ MXenes, which exhibit high electrical conductivity, a specific capacitance, and compatibility with various textile substrates. Despite these promising properties, their implementation remains challenging due to uneven particle deposition, problems with stacking, limited performance, and insufficient durability on textile substrates. This presents an essential research challenge in the development of advanced power solutions for smart textiles. This doctoral dissertation focuses on the development of electrically conductive textile materials modified with Ti₃C₂Tₓ MXene nanoparticles for use in flexible electrochemical energy storage devices. In comparison with reference studies, where a small-sized MAX phase precursor (40 µm) was used for synthesis, in our work, we synthesized Ti₃C₂Tₓ MXene nanoparticles from a larger MAX phase (100 µm) under modified etching conditions. The prepared 2D nanoparticles formed stable colloidal dispersions (ζ-potential ≤ −40 mV), suitable for deposition onto cellulose fabrics. By optimizing the process, we produced particles of larger dimensions (with a hydrodynamic diameter up to 2723 nm compared to 1422 nm in the reference sample), improved dispersion stability (a 48% decrease in absorbance after 30 days compared to 68% in the reference sample), and achieved higher yield and electrical conductivity (12.3 kS/cm compared to 8.6 kS/cm in the reference sample). By depositing Ti₃C₂Tₓ MXene nanoparticles onto cotton fabric using a dip-coating process, we investigated the effect of particle size on the surface distribution and on the electrical conductivity of the modified textiles. Contact profilometry and electrical resistance measurements demonstrated that larger particles, prepared under optimized etching conditions, enabled the formation of a more homogeneous and conductive layer. Furthermore, we studied the durability of the coatings after multiple washing cycles (up to 20 times) and confirmed that the application of polymeric protective coatings (PUR, AR, TECT) enhanced particle durability without significantly compromising textile flexibility or functionality. By introducing HrGO and LAW between MXene layers or applying thermal treatment to MXene-modified textile electrodes, we reduced particle restacking, thereby increasing the interlayer spacing, specific surface area, and electrochemical accessibility of active sites. Electrochemical characterization (CV, GCD, and EIS) revealed the pseudocapacitive behaviour of the MXene/textile electrodes, with performance strongly dependent on the treatment methods used. The incorporation of HrGO and LAW between the MXene layers enhanced the capacitive stability at higher scan rates, while the thermal treatment of the MXene/textile electrodes in an ammonia atmosphere at 700°C resulted in more than a threefold increase in the specific capacitance (1.373 F/cm² compared to 0.38 F/cm² for the untreated electrode). As a final outcome, we developed a symmetric supercapacitor (SCS6-700) with an energy density of 14.45 μWh/cm², thereby demonstrating that the engineered MXene/textile electrodes have great potential as electrochemical components for powering wearable electronic devices.
Keywords:synthesis of Ti₃C₂Tₓ MXene nanoparticles, electroconductive textiles, supercapacitor, electrochemical characterization, energy storage


Comments

Leave comment

You must log in to leave a comment.

Comments (0)
0 - 0 / 0
 
There are no comments!

Back
Logos of partners University of Maribor University of Ljubljana University of Primorska University of Nova Gorica