Poly(ionic liquid)s having coumarate counter-anions as corrosion inhibitors in acrylic UV coatings

New poly(ionic liquid) based on poly(diallyl dimethylammonium) and coumarate that can act as a corrosion inhibitor into an acrylic UV-cured formulation

Inkjet-Printed Dual-Mode Electrochromic and Electroluminescent Displays Incorporating Ecofriendly Materials

Displays and indicators are an integral component of everyday electronics. However, the short lifecycle of most applications is currently contributing to the unsustainable growth of electronic waste. In this work, we utilize ecofriendly materials in combination with sustainable processing techniques to fabricate inkjet-printed, ecofriendly dual-mode displays (DMDs). These displays can be used in a reflective mode or an emissive mode by changing between DC and AC operation due to the combination of an electrochromic (EC) and electrochemiluminescent (ECL) layer in a single device. The EC polymer poly­(3,4-ethylenedioxythiophene):poly­(styrene sulfonate) (PEDOT:PSS) serves as the reflective layer, while an ECL gel made of dimethylsulfoxide (DMSO), poly­(lactic-co-glycolic acid) (PLGA), 1-butyl-3-methylimidazoliumbis­(oxalato)­borate (BMIMBOB), and tris­(bipyridine)­ruthenium­(II) chloride (Ru2+(bpy)3Cl2) enables the emissive mode. The final dual-mode devices exhibited their maximum optical power output of 52 mcd/m2 at 4 V and 40 Hz and achieved an EC contrast of 45% and a coloration efficiency of 244 cm2/C at a wavelength of 690 nm. The fabricated devices showed clear readability in dark and light conditions when operated in reflective or emissive modes. This work demonstrates the applicability of ecofriendly and potentially biodegradable materials to reduce the amount of hazardous components in versatile display technologies

Poly(ionic liquid)s having coumarate counter-anions as corrosion inhibitors in acrylic UV coatings

New poly(ionic liquid) based on poly(diallyl dimethylammonium) and coumarate that can act as a corrosion inhibitor into an acrylic UV-cured formulation

Versatile mixed ionic-electronic conducting binders for high-power, high-energy batteries

Versatile mixed ionic-electronic conducting binders for high-power, high-energy batterie

Versatile mixed ionic-electronic conducting binders for high-power, high-energy batteries

Versatile mixed ionic-electronic conducting binders for high-power, high-energy batterie

Carrageenans as Sustainable Water-Processable Binders for High-Voltage NMC811 Cathodes

Carrageenans as Sustainable Water-Processable Binders for High-Voltage NMC811 Cathode

PEDOT Radical Polymer with Synergetic Redox and Electrical Properties

The development of new redox polymers is being boosted by the increasing interest in the area of energy and health. The development of new polymers is needed to further advance new applications or improve the performance of actual devices such as batteries, supercapacitors, or drug delivery systems. Here we show the synthesis and characterization of a new polymer which combines the present most successful conjugated polymer backbone and the most successful redox active side group, i.e., poly­(3,4-ethylenedioxythiophene) (PEDOT), and a nitroxide stable radical. First, a derivative of the 3,4-ethylenedioxythiophene (EDOT) molecule with side nitroxide stable radical group (TEMPO) was synthesized. The electrochemical polymerization of the PEDOT-TEMPO monomer was investigated in detail using cyclic voltammetry, potential step, and constant current methods. Monomer and polymer were characterized by NMR, FTIR, matrix-assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF MS), electron spin resonance (ESR) spectroscopy, elemental analysis, cyclic voltammetry, and four-point probe conductivity. The new PEDOT-TEMPO radical polymer combines the electronic conductivity of the conjugated polythiophene backbone and redox properties of the nitroxide group. As an example of application, this redox active polymer was used as a conductive binder in lithium ion batteries. Good cycling stability with high Coulombic efficiency and increased cyclability at different rates were obtained using this polymer as a replacement of two ingredients: conductive carbon additive and polymeric binders

Carrageenans as Sustainable Water-Processable Binders for High-Voltage NMC811 Cathodes

Poly(vinylidene fluoride) (PVDF) is the most common binder for cathode electrodes in lithium-ion batteries. However, PVDF is a fluorinated compound and requires toxic N-methyl-2-pyrrolidone (NMP) as a solvent during the slurry preparation, making the electrode fabrication process environmentally unfriendly. In this study, we propose the use of carrageenan biopolymers as a sustainable source of water-processable binders for high-voltage NMC811 cathodes. Three types of carrageenan (Carr) biopolymers were investigated, with one, two, or three sulfonate groups (SO3–), namely, kappa, iota, and lambda carrageenans, respectively. In addition to the nature of carrageenans, this article also reports the optimization of the cathode formulations, which were prepared by using between 5 wt % of the binder to a lower amount of 2 wt %. Processing of the aqueous slurries and the nature of the binder, in terms of the morphology and electrochemical performance of the electrodes, were also investigated. The Carr binder with 3SO3– groups (3SO3– Carr) exhibited the highest discharge capacities, delivering 133.1 mAh g–1 at 3C and 105.0 mAh g–1 at 5C, which was similar to the organic-based PVDF electrode (136.1 and 108.7 mAh g–1, respectively). Furthermore, 3SO3– Carr reached an outstanding capacity retention of 91% after 90 cycles at 0.5C, which was attributed to a homogeneous NMC811 and a conductive carbon particle dispersion, superior adhesion strength to the current collector (17.3 ± 0.7 N m–1 vs 0.3 ± 0.1 N m–1 for PVDF), and reduced charge-transfer resistance. Postmortem analysis unveiled good preservation of the NMC811 particles, while the 1SO3– Carr and 2SO3– Carr electrodes showed damaged morphologies

Innovative Strategy for Developing PEDOT Composite Scaffold for Reversible Oxygen Reduction Reaction

Innovative Strategy for Developing PEDOT Composite Scaffold for Reversible Oxygen Reduction Reaction</p