Article
Polymer Science
Rogerio Daltro Knuth, Flavio A. Knuth, Guilherme K. Maron, Raphael D. C. Balboni, Mario L. Moreira, Cristiane W. Raubach, Pedro L. G. Jardim, Neftali L. Carreno, Cesar O. Avellaneda, Eduardo C. Moreira, Sergio S. Cava
Summary: A composite material based on XG and GNs was found to have high ionic conductivity and is expected to have potential applications in various electrochemical devices.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Behnam Eslami, Ismaeil Ghasemi, Masoud Esfandeh
Summary: Solid polymer electrolytes (SPEs) are a promising avenue for flexible lithium-ion batteries. However, the low ionic conductivity of polymers remains a challenge. In this study, SPE/FGO electrolytes were prepared using PEO, polyvinyl alcohol, LiClO4, and graphene functionalized with polyethylene glycol. The presence of functionalized graphene effectively reduced crystallinity, and the samples exhibited adequate ionic conductivity at room temperature.
Article
Chemistry, Physical
Afshana Afroj Bristi, Alfred Junio Samson, Abinaya Sivakumaran, Shantel Butler, Venkataraman Thangadurai
Summary: A high sodium-ion conductive, filler-less composite solid polymer electrolyte (SPE) film has been successfully fabricated for solid-state sodium-ion batteries (ss-SIBs) using a facile solution casting process. The study demonstrates the potential applicability of the SPE in next-generation high-power rechargeable SIBs.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Analytical
Celine Chia Qi Wong, Austin Yuhang Yap, Chiam-Wen Liew
Summary: The addition of ionic liquid BmImBr significantly improves the ionic conductivity of PVA-LiTf polymer electrolytes, exhibiting compliance with the Arrhenius theory and a decrease in glass transition temperature. Fourier-Transform Infrared studies reveal complexation between PVA, LiTf, and BmImBr.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Energy & Fuels
Tsung-Rong Kuo, Lu -Yin Lin, Kuan-Yu Lin, Sibidou Yougbare
Summary: This study investigates the addition of TiO2 with different particle sizes and phases as an inorganic filler in gel electrolyte for FSC, aiming to enhance the ionic conductivity. Results show that using P25 TiO2 in gel electrolyte can achieve the best energy storage ability for FSC.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
Faridz Ramlee, N. K. Farhana, Shahid Bashir, Norshahirah M. Saidi, Fatin Saiha Omar, S. Ramesh, K. Ramesh, S. Ramesh
Summary: In this study, gel polymer electrolytes (GPEs) were prepared with the addition of triglyme, which increased the ionic conductivity and specific capacitance of electric double-layer capacitors (EDLCs). The performance of the GPEs remained stable after cycling tests.
Article
Materials Science, Multidisciplinary
Jacky Ing Chiong Wong, S. Ramesh, H. K. Jun, Chiam-Wen Liew
Summary: In this study, ionic liquid-based sodium ion conductors were prepared using solution casting technique, showing improved ionic conductivity when compared to additives-free ion conductors. The addition of BmImBr to the polymer electrolytes significantly enhanced the ionic conductivity by five orders of magnitude, following VTF theory and reducing the glass transition temperature. Interaction between PVA, CH3COONa center dot 3H(2)O, and BmImBr was confirmed through FTIR spectroscopy studies, leading to a wider electrochemical potential window and the assembly of EDLCs with high specific capacitance and excellent stability.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jae Yeon Lee, Juyoung Moon, Chang Soo Lee, Jung Tae Park
Summary: Designing high-performance polymer-based electrolytes is crucial for enhancing the conductivity of electrochemical capacitors. In this study, a highly conductive polymer/inorganic hybrid electrolyte was developed to improve the ionic conductivity by increasing the free volume between the polymer chains, and it was found that rod-like or other similarly shaped fillers can promote the formation of ionic conduction networks to improve the ionic conductivity.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Physical
Li Yang, Qing Liu, Hang Ma, Qi An, Xiaofeng Wang, Yuqing Ding, Zhiyuan Mei, Xuelin Sheng, Lingyan Duan, Jiyang Xie, Hong Guo
Summary: Polymer electrolyte-based solid-state lithium metal batteries can increase energy density and address safety issues. However, polymer electrolytes have low lithium ion migration and weak mechanical strength. Therefore, it is crucial to search for functional fillers to enhance their performance.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Physical
Alin Alexandru Enache, Diana Serbezeanu, Tachita Vlad-Bubulac, Alina-Mirela Ipate, Dana Mihaela Suflet, Mioara Drobota, Mihaela Barbalata-Mandru, Radu Mihail Udrea, Cristina Mihaela Rimbu
Summary: The design of hydrogel networks with tuned properties is crucial for the development of innovative biomedical materials. In this study, hydrogels were prepared using poly(vinyl alcohol) and xanthan gum, with oxalic acid as a crosslinker. The structure and morphology of the hydrogels were characterized, and their swelling behavior was studied. The results showed that the blending ratio of poly(vinyl alcohol) and xanthan gum affected the surface morphology of the hydrogels. The presence of oxalic acid influenced the hydrophilicity of the blends. The hydrogels without xanthan gum exhibited smaller pore diameter, lower swelling degree, and higher elastic modulus. Moreover, the hydrogels showed antibacterial activity against both Gram positive and Gram negative bacteria.
Article
Chemistry, Physical
Seyedeh-Arefeh Safavi-Mirmahalleh, Svetlana N. Eliseeva, Amir Rezvani Moghaddam, Hossein Roghani-Mamaqani, Mehdi Salami-Kalajahi
Summary: Polymer electrolytes based on natural materials such as cellulose have been used for lithium-ion batteries due to their cheapness, compatibility with the environment, and electron-donating groups in their structure. Grafting ion-conducting segments onto cellulose can enhance the ionic conductivity of the electrolyte.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Engineering, Chemical
Yifan Xia, Sinu C. Rajappan, Dmytro Serhiichuk, Mikkel Rykaer Kraglund, Jens Oluf Jensen, David Aili
Summary: A series of poly(vinyl alcohol-co-vinyl acetal) gel electrolytes were prepared and assessed for their performance as electrode separators in alkaline water electrolysis. The membrane properties could be tuned by varying the degree of functionalization, and a membrane with moderate vinyl acetal content showed good mechanical robustness and ion conductivity. The membrane effectively prevented hydrogen crossover during alkaline water electrolysis tests. The strategies presented in this work have general relevance to the field for the development of new ion-solvating membrane systems.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Physical
Camila M. Cholant, Marco P. Rodrigues, Raphael D. C. Balboni, Luana U. Krueger, Rafaela M. J. Lemos, Daniele F. Lopes, Agnieszka Pawlicka, Cesar O. Avellaneda
Summary: This study investigates the preparation and properties of solid polymer electrolytes based on PVA and GA. The results show that the PVA/GA electrolyte has high conductivity and good ion transport ability, making it suitable for solid-state lithium-ion batteries or electrochemical double-layer capacitors.
Article
Polymer Science
Haiyan Du, Jiaying Wang, Zemin Wu, Zhubo Liu
Summary: This paper investigates the effect of ionic liquid content on the structure and properties of flexible solid-state supercapacitors. Binder-free polymer electrodes with outstanding electrochemical performance and mechanical properties were fabricated using poly (vinyl alcohol)/ionic liquid (PVA/IL) composite films as substrates. At the optimal content, the electrode demonstrated ideal capacitance and conductivity. The electrode was used to assemble a polymer supercapacitor, which exhibited excellent electrochemical performance and flexibility.
Article
Biochemistry & Molecular Biology
Diana Serbezeanu, Corneliu Hamciuc, Tachita Vlad-Bubulac, Alina-Mirela Ipate, Gabriela Lisa, Ina Turcan, Marius Andrei Olariu, Ion Anghel, Dana Maria Preda
Summary: Flame-resistant polymer composites were prepared by incorporating flame retardant, cerium oxide, and graphene oxide into a polyvinyl alcohol (PVA) matrix. Thermogravimetric analysis and microscale combustion tests showed improved fire resistance properties due to the addition of these materials. Moreover, composites with LiClO4 exhibited higher electrical conductivity and enhanced electrical properties. Taking these findings into consideration, these improved polymer composites are intended for use in Li-ion battery manufacturing.
Article
Engineering, Electrical & Electronic
Marco P. Rodrigues, Camila M. Cholant, Luana U. Krueger, Lourenzo M. Rodrigues, Javier A. Gomez, Joao F. Prolo Filho, Wladimir H. Flores, Andre Guendel, Agnieszka Pawlicka, Cesar O. Avellaneda
Summary: This study investigates the physical and electrochemical properties of WO3 thin films and their electrochromic mechanism using experiments and a mathematical model. The results show high performance in electrochromic efficiency, optical modulation, charge density, and reversibility of color change. The relationship between electrochromic and electrochemical reactions is confirmed by analyzing the data from various characterization techniques.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Franciani C. Sentanin, Willian R. Caliman, Rodrigo C. Sabadini, Carla C. S. Cavalheiro, Rui F. P. Pereira, Maria M. Silva, Agnieszka Pawlicka
Summary: Nanocomposite polymer electrolytes were synthesized using sodium alginate and modified montmorillonite clays, and characterized by X-ray diffraction and electrochemical impedance spectroscopy. The results showed that adding clay could improve the conductivity of the electrolytes, with higher clay content promoting the formation of intercalated structures.
Article
Chemistry, Multidisciplinary
Vahideh Bayzi Isfahani, Rui F. P. Pereira, Mariana Fernandes, Rodrigo C. Sabadini, Sonia Pereira, Hamid Rezagholipour Dizaji, Ali Arab, Elvira Fortunato, Agnieszka Pawlicka, Rosa Rego, Veronica de Zea Bermudez, Maria M. Silva
Summary: Solid polymer electrolytes (SPEs) based on gellan gum show promising electrical and electrochemical properties, making them suitable for electrochromic devices (ECDs) applications.
Article
Materials Science, Multidisciplinary
Raphael D. C. Balboni, Camila M. Cholant, Luana U. Kruger, Elton A. Moura, Guilherme K. Maron, Wladimir H. Flores, André Gundel, Darci A. Gatto, Agnieszka Pawlicka, Cesar A. O. Avellaneda, Robson Andreazza
Summary: Thin films of cerium dioxide and cerium dioxide doped with vanadium pentoxide were prepared as smart materials using a sol-gel route and spin coating deposition. Weathering processes and temperature effects were studied, showing that doping reduced degradation, increased resistance of the film with temperature, and enhanced charge insertion capacity at higher temperatures.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Engineering, Electrical & Electronic
Rafaela M. J. Lemos, Raphael D. C. Balboni, Camila M. Cholant, Cristiane F. Azevedo, Agnieszka Pawlicka, Andre Gundel, Wladimir H. Flores, Cesar O. Avellaneda
Summary: Doping with molybdenum improved the cycling stability and reversibility of Niobium pentoxide thin films, resulting in increased charge density, ionic conductivity, and reversibility after 50 cycles. The X-ray diffraction analysis showed a mixture of crystalline phases in the doped films, indicating enhanced performance for potential use in electrochromic devices.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Raphael D. C. Balboni, Guilherme K. Maron, Mateus G. Masteghin, Mehmet O. Tas, Lucas S. Rodrigues, Veridiana Gehrke, Jose H. Alano, Robson Andreazza, Neftali L. Carreno, S. Ravi P. Silva
Summary: A flexible supercapacitor with state-of-the-art performance is fabricated using carbon nanotube arrays and polyaniline/polydimethylsiloxane electrodes. The supercapacitor exhibits excellent energy storage properties and mechanical agility performance.
Article
Polymer Science
Nadiyah Rashed Al Atmah, Willian R. Caliman, Agnieszka Pawlicka, Ribal Georges Sabat, Jean-Michel Nunzi
Summary: In this study, homogeneous thin films of chitosan-PADA dye were deposited on glass substrates using spin-coating method. ATR-FTIR spectroscopy and UV-VIS spectroscopy were performed to characterize the films, revealing hydrogen bonding and the formation of surface relief grating (SRG). AFM confirmed the existence of SRG and measured the grating depth.
Article
Chemistry, Physical
Camila M. Cholant, Marco P. Rodrigues, Raphael D. C. Balboni, Luana U. Krueger, Rafaela M. J. Lemos, Daniele F. Lopes, Agnieszka Pawlicka, Cesar O. Avellaneda
Summary: This study investigates the preparation and properties of solid polymer electrolytes based on PVA and GA. The results show that the PVA/GA electrolyte has high conductivity and good ion transport ability, making it suitable for solid-state lithium-ion batteries or electrochemical double-layer capacitors.
Article
Polymer Science
Rogerio Daltro Knuth, Flavio A. Knuth, Guilherme K. Maron, Raphael D. C. Balboni, Mario L. Moreira, Cristiane W. Raubach, Pedro L. G. Jardim, Neftali L. Carreno, Cesar O. Avellaneda, Eduardo C. Moreira, Sergio S. Cava
Summary: A composite material based on XG and GNs was found to have high ionic conductivity and is expected to have potential applications in various electrochemical devices.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Rodrigo C. Sabadini, Mariana Fernandes, Veronica de Zea Bermudez, Agnieszka Pawlicka, Maria M. Silva
Summary: The increase in agricultural product demand has complicated the modernization of agriculture. Research advances have improved production systems, but their unsustainable application is a challenge. Hydrogels, as attractive materials, offer potential solutions to this problem in agriculture.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Willian Robert Caliman, Franciani Cassia Sentanin, Rodrigo Cesar Sabadini, Jose Pedro Donoso, Claudio Jose Magon, Agnieszka Pawlicka
Summary: Nanocomposite polymer electrolytes (NPEs) are prepared using gellan gum (GG) and montmorillonite (Na+SYN-1) clay. These NPEs show high conductivity, good thermal stability, and optical transparency. The coordination environment of Cu2+ ions in the samples is identified using CW-EPR.
Article
Materials Science, Multidisciplinary
Willian R. Caliman, Franciani C. Sentanin, Rodrigo C. Sabadini, Rodrigo H. S. Garcia, Tatiana Monaretto, Luiz A. Colnago, Agnieszka Pawlicka
Summary: This paper investigates nanocomposite polymer electrolytes (SPEs) consisting of montmorillonite (MMT; Na+SYN-1) and gellan gum. The characteristics of the membrane samples were analyzed using ATR-FTIR, TD-NMR, and SEM. The results showed an interaction between gellan gum and Na+SYN-1, as well as a more homogeneous surface in the nanocomposite with 40 wt.% Na+SYN-1. The application of NPEs in small electrochromic devices (ECDs) exhibited a decrease in peaks and charge density.
Article
Polymer Science
Katherine Pacheco, Gabriela Aldea-Nunzi, Agnieszka Pawlicka, Jean-Michel Nunzi
Summary: Curcumin, a natural dye found in turmeric, can be used as a photosensitizer in acrylamide-based photopolymers for holographic data storage. Increasing the concentration of curcumin enhances the absorbance, refractive index contrast, sensitivity, and diffraction efficiency of the photopolymer films. Furthermore, the addition of NaOH promotes the efficiency of photopolymerization in the AA-curcumin-based sample.
Article
Chemistry, Physical
Marcely Echeverria Oliveira, Bruno Vasconcellos Lopes, Jessica Helisa Hautrive Rossato, Guilherme Kurz Maron, Betty Braga Gallo, Andrei Borges La Rosa, Raphael Dorneles Caldeira Balboni, Mariliana Luiza Ferreira Alves, Marcos Roberto Alves Ferreira, Luciano da Silva Pinto, Fabricio Rochedo Conceicao, Evandro Piva, Claudio Martin Pereira de Pereira, Marcia Tsuyama Escote, Neftali Lenin Villarreal Carreno
Summary: A diagnostic chip platform based on a disposable electrochemical biosensor has been developed for the detection of SARS-CoV-2 antibodies. It helps with epidemiological public safety measures and the control of population's immune response to vaccines.
