Article
Chemistry, Physical
M. Basappa, H. Ganesha, S. Veeresh, Y. S. Nagaraju, M. Vandana, H. Vijeth, H. Devendrappa
Summary: This paper reports on the electrochemical properties of PEO, PEO/PVDF10, and PEO/PVDF30 blend films. The XRD spectra reveal the structural properties of the blends, FTIR spectra provide information on the chemical interactions between the blends, and observed FESEM and AFM images give insights into the morphology and surface topology of the blend films. Through TGA, DTA, DSC, and CV curve analysis, the thermal stability and electrochemical properties of the polymer blend films were evaluated, demonstrating that the prepared blend films are promising candidates for energy storage applications as separators.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Polymer Science
Qunying Wang, Sergey Popov, Veronika Strehmel, Jochen S. Gutmann, Bernd Strehmel
Summary: A series of cyanines with varying methine chain lengths and terminal groups were reacted with a specific cation after excitation in the NIR region, resulting in the generation of free radicals and conjugate acids. This study investigated the efficiency of free radical and cationic polymerization, as well as their combination as a hybrid system. By using NIR-LED exposure and varying the sensitizers, different photopolymerization efficiencies were achieved. The results showed that the combination of free radical and cationic polymerization can work effectively in hybrid systems.
Article
Chemistry, Physical
Yuxin Jiang, Xinyuan Zhang, Xianzhen Xu, Shida Gong, Zonghua Wang, Yu Zhou
Summary: Studies have shown that mixing two or more ionic liquids (IL) to form IL mixtures has become a new research hotspot for designing ILs with desirable properties. However, there have been fewer fundamental studies on the interactions and mixing behaviors of IL mixtures. In this work, two ILs containing the same cation [EMIM]+ were used to prepare IL mixtures, and their mixing behavior was investigated through experimental methods and quantum chemical calculations. The main conclusions are: (1) DMSO forms stronger hydrogen bonds with EMIMTFSI than with EMIMBF4. (2) The addition of EMIMBF4 weakens the hydrogen bonding interactions in the EMIMTFSI-EMIMBF4 system and strengthens the coulombic interactions. (3) With dilution, the C2-H bond experiences the smallest changes, suggesting that it remains the main interaction site. (4) New formation complexes between EMIMBF4 and EMIMTFSI were confirmed through excess infrared spectra.
Article
Polymer Science
S. Shenbagavalli, M. Muthuvinayagam, M. S. Revathy
Summary: Mg2+ ion-conducting solid blend polymer electrolytes based on PEO: P(VdF-HFP) were prepared using the solution casting technique. The addition of salt was found to decrease the crystalline phase of the polymer electrolytes. The formation of complexes between polymers and salt was confirmed by FTIR analysis. The polymer electrolytes showed higher ionic conductivity and good electrochemical stability.
Article
Engineering, Electrical & Electronic
S. Shenbagavalli, M. Muthuvinayagam, S. Jayanthi, M. S. Revathy
Summary: In this study, Na+ ion conducting solid blend polymer electrolytes with Al2O3 filler were prepared and characterized using XRD, FTIR, and AC-impedance techniques. The addition of Al2O3 was found to enhance the ionic conductivity of the electrolytes. CV and LSV studies confirmed the electrochemical behavior of the polymer electrolytes.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Chemical
Li-Chi Hung, Nai-Hsin Pan
Summary: This study investigates the thermal behavior of the ionic liquid [EMIM][Tf2N] and reveals its reactivity hazard at high temperatures, providing valuable thermal safety data for sustainable construction applications. The study also considers the impact of different storage containers on thermal safety.
Article
Chemistry, Physical
Kana Ishisone, Guido Ori, Mauro Boero
Summary: This study provides a detailed insight into the structural and electronic interactions in the ionic liquid targeted for low-power electronics and optoelectronic devices. Through first principles dynamical simulations and long-lasting dynamical simulations, the nature of bonding and non-bonding interactions, conformational changes, induced dipole moments, and the mobilities of the ionic species are revealed. Additionally, the analysis of the electronic structure and charge distributions helps to understand the electrostatic interactions, hydrogen bonding properties, and the infra-red and dielectric response of the system.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Thermodynamics
Jan Pavlicek, Grozdana Bogdanic, Ivan Wichterle
Summary: In this study, vapor-liquid equilibrium data near azeotropic points of the title system were measured at different temperatures. A newly-developed method based on relatively small amounts of input data was used to process the data, providing a thermodynamic description of azeotropic behavior.
FLUID PHASE EQUILIBRIA
(2022)
Article
Materials Science, Multidisciplinary
Omed Gh Abdullah, Hawzhin T. Ahmed, Dana A. Tahir, Gelas M. Jamal, Azhin H. Mohamad
Summary: This study improved the ionic conductivity of polymer electrolytes by incorporating polyethylene glycol (PEG) plasticizer in different stoichiometric ratios. The resistance of the electrolyte decreased with increasing temperature, and the frequency- and temperature-dependence of conductivity followed specific relation models. Through specific model analysis, the plasticized samples exhibited higher ionic conductivity and shorter dielectric relaxation time.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Physical
Yinsi Xu, Jun Li, Wanggen Li
Summary: The addition of an appropriate amount of ZnO nanofiller contributes to the improvement in electrochemical performance of solid-state lithium-ion batteries, whereas an excessive amount can lead to reduced performance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Polymer Science
P. Ajay Ajay Kumar, A. Mallikarjun, Maheshwar Reddy Mettu, P. Anand Kumar Sagar, C. Thirmal, M. Jaipal Reddy, J. Siva Kumar
Summary: The research work focuses on the fabrication of lithium based solid polymer electrolytes (LSPEs) using a solution-cast approach. The study demonstrates that the crosslinking of polymer network with salt enhances the dissociation behavior of LiCF3SO3. The amorphous behavior of LSPEs and the complexation, ionic pairs, and aggregation phenomena in LSPE films were analyzed using XRD, FTIR, and EIS, respectively. Furthermore, the discharge characteristics of the flexible electrochemical storage device (FESD) were evaluated.
POLYMER-PLASTICS TECHNOLOGY AND MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Fabien Krebs, Oliver Hoefft, Frank Endres
Summary: The interface between ionic liquids (ILs) and metals, particularly in electrochemical deposition and nanoscale tribology applications, was studied. The interaction between [Py-1,Py-4]TFSI and [EMIm]TFSI ILs and platinum was found to be minimal, while strong interaction with the surface was observed in the case of [EMIm]TFSI. On the other hand, massive decomposition of both ILs occurred on the aluminum surface. The spectra revealed cleavage of C-F or N-S bonds in the [TFSI](-) anion and the appearance of various decomposition products at the interface.
Article
Polymer Science
I. S. Elashmawi, A. M. Ismail
Summary: Pure nickel ferrite nanoparticles were prepared and added to PVDF/PEO blend to prepare nanocomposite films. The films were characterized and showed interaction between nanoparticles and blend, as well as good crystalline structure and magnetic properties. These nanocomposite films have potential applications in magnetic field.
Article
Polymer Science
H. Manjunatha, R. Damle, G. N. Kumaraswamy
Summary: In this study, a PEO/PVDF-HFP/LiTFSI solid polymer electrolyte blend was subjected to microstructural modification by oxygen ion irradiation. The results showed that the ionic conductivity and segmental motion of the system increased after irradiation, while the ion activation energy decreased, crystallinity reduced, and possible scission of polymer chains occurred.
Article
Chemistry, Physical
Chang-Fei Yu, Shang-Hao Liu, Rui Xia, Ke-Fan Wu
Summary: This study investigates the thermal stability and decomposition characteristics of an imidazole ionic liquid 1-ethyl-3-methylimidazolium bis(trifluor omethylsulfonyl)imide ([Emim][NTf2]). The research combines experimental and theoretical methods to provide insights into the thermal decomposition behavior of ionic liquids.
JOURNAL OF MOLECULAR LIQUIDS
(2022)