scholarly journals Sustainable and Printable Nanocellulose-Based Ionogels as Gel Polymer Electrolytes for Supercapacitors

Nanomaterials ◽  
2022 ◽  
Vol 12 (2) ◽  
pp. 273
Author(s):  
Rosa M. González-Gil ◽  
Mateu Borràs ◽  
Aiman Chbani ◽  
Tiffany Abitbol ◽  
Andreas Fall ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
Series Resistance ◽  
Cellulose Nanofibers ◽  
Gel Polymer Electrolyte ◽  
Equivalent Series Resistance ◽  
Gel Polymer Electrolytes ◽  
Dimethyl Phosphate ◽  
A Current

A new gel polymer electrolyte (GPE) based supercapacitor with an ionic conductivity up to 0.32–0.94 mS cm−2 has been synthesized from a mixture of an ionic liquid (IL) with nanocellulose (NC). The new NC-ionogel was prepared by combining the IL 1-ethyl-3-methylimidazolium dimethyl phosphate (EMIMP) with carboxymethylated cellulose nanofibers (CNFc) at different ratios (CNFc ratio from 1 to 4). The addition of CNFc improved the ionogel properties to become easily printable onto the electrode surface. The new GPE based supercapacitor cell showed good electrochemical performance with specific capacitance of 160 F g−1 and an equivalent series resistance (ESR) of 10.2 Ω cm−2 at a current density of 1 mA cm−2. The accessibility to the full capacitance of the device is demonstrated after the addition of CNFc in EMIMP compared to the pristine EMIMP (99 F g−1 and 14.7 Ω cm−2).

Enhanced supercapacitive performances of functionalized activated carbon in novel gel polymer electrolytes with ionic liquid redox-mediated poly(vinyl alcohol)/phosphoric acid

RSC Advances ◽  
2016 ◽  
Vol 6 (79) ◽  
pp. 75376-75383 ◽  
Author(s):  
Hyun Seok Jang ◽  
C. Justin Raj ◽  
Won-Gil Lee ◽  
Byung Chul Kim ◽  
Kook Hyun Yu
Keyword(s):  
Ionic Liquid ◽  
Activated Carbon ◽  
Phosphoric Acid ◽  
Polymer Electrolyte ◽  
Polymer Electrolytes ◽  
Vinyl Alcohol ◽  
Gel Polymer Electrolyte ◽  
Poly Vinyl Alcohol ◽  
Gel Polymer Electrolytes ◽  
Carbon Supercapacitors

Functionalized activated carbon supercapacitors were fabricated using [EMIM]BF4 mediated PVA/H3PO4 gel polymer electrolytes. The ionic-liquid [EMIM]BF4 addition in PVA/H3PO4 gel polymer electrolyte demonstrated excellent supercapacitor performances.

Preparation and characterization of organic rectorite composite gel polymer electrolyte

Clay Minerals ◽  
2007 ◽  
Vol 42 (1) ◽  
pp. 59-68 ◽  
Author(s):  
Y. Huang ◽  
X. Y. Ma ◽  
G. Z. Liang ◽  
H. X. Yan ◽  
X. Qu ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Polymer Matrix ◽  
Polymer Electrolytes ◽  
Fire Hazard ◽  
Gel Polymer Electrolyte ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Gel Polymer Electrolytes ◽  
Liquid Electrolytes ◽  
Composite Gel

AbstractIn liquid-filled batteries, the liquid electrolytes may escape or present a fire hazard and an inert spacer is needed to separate the electrodes. Alternative polymer-based electrolytes are of current technological interest. Solid polymer electrolytes are non-volatile, non-corrosive materials, which can readily be processed into any shape or size. However, despite possessing the required mechanical properties, they have inherently lower conductivity. Gel-based systems are an attempt to strike a balance between the high conductivity of organic liquid electrolytes and the dimensional stability of a solid polymer.Rectorite was modified with dodecyl benzyl dimethyl ammonium chloride to form organic-modified rectorite (OREC). OREC was used as a filler additive to modify gel polymer electrolytes (GPEs) and prepare composite gel polymer electrolytes (CPEs) which consisted of polymethyl methacrylate (PMMA) used as a polymer matrix, propylene carbonate (PC), used as a plasticizer, and LiClO4, used as a lithium ion producer. A variety of physical and chemical techniques was used to characterize the CPEs. The interlayer d spacing of OREC was much larger than that of the initial rectorite (2.22 nm). OREC also possesses a fine microscopic structure, and has a hydrophobic surface. Molau and XRD analysis of CPEs indicate that OREC has good compatibility with the components of CPEs and can be dispersed well. The effects of temperature and OREC dose on properties were studied. The temperature dependence of ionic conductivity of CPEs is well fitted by the VTF (Vogel-Tamman-Fulcher) relation. OREC doses of 5 phr gave the greatest ionic conductivity. This amount also greatly increased the plasticizer maintenance levels. Due to the occupancy of free volume space in the polymer matrix of CPEs by OREC, the bulk resistance of the CPEs was lowered and the glass transition temperature (Tg) increased. The sheet structure of OREC is thought to improve the decomposition temperature of CPEs.

scholarly journals Inorganic Fillers in Composite Gel Polymer Electrolytes for High-Performance Lithium and Non-Lithium Polymer Batteries

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 614
Author(s):  
Vo Pham Hoang Huy ◽  
Seongjoon So ◽  
Jaehyun Hur
Keyword(s):  
Polymer Electrolytes ◽  
High Performance ◽  
Gel Polymer Electrolyte ◽  
Inorganic Filler ◽  
Gel Polymer Electrolytes ◽  
Lithium Polymer Batteries ◽  
Conductivity Enhancement ◽  
Composite Gel ◽  
Inorganic Fillers ◽  
Historical Developments

Among the various types of polymer electrolytes, gel polymer electrolytes have been considered as promising electrolytes for high-performance lithium and non-lithium batteries. The introduction of inorganic fillers into the polymer-salt system of gel polymer electrolytes has emerged as an effective strategy to achieve high ionic conductivity and excellent interfacial contact with the electrode. In this review, the detailed roles of inorganic fillers in composite gel polymer electrolytes are presented based on their physical and electrochemical properties in lithium and non-lithium polymer batteries. First, we summarize the historical developments of gel polymer electrolytes. Then, a list of detailed fillers applied in gel polymer electrolytes is presented. Possible mechanisms of conductivity enhancement by the addition of inorganic fillers are discussed for each inorganic filler. Subsequently, inorganic filler/polymer composite electrolytes studied for use in various battery systems, including Li-, Na-, Mg-, and Zn-ion batteries, are discussed. Finally, the future perspectives and requirements of the current composite gel polymer electrolyte technologies are highlighted.

High-performance ionic liquid-based nanocomposite polymer electrolytes with anisotropic ionic conductivity prepared by coupling liquid crystal self-templating with unidirectional freezing

2015 ◽  
Vol 3 (5) ◽  
pp. 2128-2134 ◽  
Author(s):  
Hongzan Song ◽  
Ningning Zhao ◽  
Weichao Qin ◽  
Bing Duan ◽  
Xiaoya Ding ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Liquid Crystal ◽  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
High Performance ◽  
Vacuum Degassing ◽  
Freezing Method ◽  
Nanocomposite Polymer ◽  
Unidirectional Freezing ◽  
Nanocomposite Polymer Electrolytes

High-performance NCPE has been fabricated by using unidirectional freezing method, liquid crystal self-templating approach and vacuum degassing method.

Ionic Conductivity, Morphology and Transport Number of Lithium Ions in PMMA Based Gel Polymer Electrolytes

2013 ◽  
Vol 334-335 ◽  
pp. 137-142 ◽  
Author(s):  
Lisani Othman ◽  
Khairul Bahiyah Md. Isa ◽  
Zurina Osman ◽  
Rosiyah Yahya
Keyword(s):  
Ionic Conductivity ◽  
Salt Concentration ◽  
Polymer Electrolytes ◽  
Ethylene Carbonate ◽  
Transference Number ◽  
Gel Polymer Electrolytes ◽  
Casting Technique ◽  
Ionic Transference Number ◽  
Temperature Dependence Of Conductivity ◽  
Solution Casting Technique

The gel polymer electrolytes (GPEs) composed of polymethylmethacrylate (PMMA) with lithium trifluoromethanesulfonate (LiCF3SO3) salt dissolved in a binary mixture of ethylene carbonate (EC) and propylene carbonate (PC) organic solvents have been prepared by the solution casting technique. The samples are prepared by varying the salt concentrations from 5 wt.% to 30 wt.%. Impedance spectroscopy measurement has been carried out to determine the ionic conductivity of the samples. The sample containing 25 wt.% of LiCF3SO3salt exhibits the highest room temperature ionic conductivity of 2.56 x 10-3S cm-1. The conductivity of the GPEs has been found to depend on the salt concentration added to the sample, while at higher salt concentration reveals a decrease in the ionic conductivity due to ions association. The temperature dependence of conductivity from 303 K to 373 K is found to obey the Arrhenius law. The ionic transference number,tiof GPEs has been estimated by the DC polarization method and the value is found to be 0.98, 0.93, and 0.97 for the sample containing 25 wt.%, 5 wt.% and 30 wt.% respectively. This result is consistent with the conductivity studies.

Impact of Cationic Molecular Length of Ionic Liquid Electrolytes on Cell Performances of 18650 Supercapacitors

2021 ◽  
Author(s):  
Phatsawit Wuamprakhon ◽  
Ruttiyakorn Donthongkwa ◽  
Kanit Hantanasirisakul ◽  
Vinich Promarak ◽  
Jumras Limtrakul ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Porous Carbon ◽  
Room Temperature ◽  
Series Resistance ◽  
Room Temperature Ionic Liquids ◽  
Specific Cell ◽  
Equivalent Series Resistance ◽  
Molecular Length ◽  
Cell Capacitance

The specific cell capacitance, equivalent series resistance (ESR) and equivalent distributed resistance (EDR) of porous carbon-based supercapacitors linearly depend on the cation molecular length (1 dimension) of room-temperature ionic liquids.

scholarly journals Characteristics of Dye-Sensitized Solar Cell Assembled from Modified Chitosan-Based Gel Polymer Electrolytes Incorporated with Potassium Iodide

Molecules ◽  
2020 ◽  
Vol 25 (18) ◽  
pp. 4115 ◽  
Author(s):  
Aimi Mahirah Zulkifli ◽  
Nur Izzah Aqilah Mat Said ◽  
Shujahadeen Bakr Aziz ◽  
Elham Mohammed Ali Dannoun ◽  
Shameer Hisham ◽  
...  
Keyword(s):  
Solar Cells ◽  
Ionic Conductivity ◽  
Dielectric Permittivity ◽  
Polymer Electrolyte ◽  
Potassium Iodide ◽  
Polymer Electrolytes ◽  
Dye Sensitized Solar Cells ◽  
Gel Polymer Electrolytes ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

In the present work, phthaloyl chitosan (PhCh)-based gel polymer electrolytes (GPEs) were prepared using dimethylformamide (DMF) as a solvent, ethyl carbonate (EC) as a co-solvent, and a set of five quaternaries of potassium iodide (KI) as a doping salt, which is a mixed composition of iodine (I2). The prepared GPEs were applied to dye-sensitized solar cells (DSSC) to observe the effectiveness of the electrolyte, using mesoporous TiO2, which was sensitized with N3 dye as the sensitizer. The incorporation of the potassium iodide-based redox couple in a polymer electrolyte is fabricated for dye-sensitized solar cells (DSSCs). The number of compositions was based on the chemical equation, which is 1:1 for KI:I2. The electrical performance of prepared GPE systems have been assessed using electrical impedance spectroscopy (EIS), and dielectric permittivity. The improvement in the ionic conductivity of PhCh-based GPE was observed with the rise of salt concentration, and the maximum ionic conductivity (4.94 × 10−2 S cm−1) was achieved for the 0.0012 mol of KI:I2. The study of dielectric permittivity displays that ions with a high dielectric constant are associated with a high concentration of added ions. Furthermore, the gel polymer electrolyte samples were applied to DSSCs to detect the conversion effectiveness of the electrolytes. For electrolytes containing various content of KI:I2 the highest conversion efficiency (η%) of DSSC obtained was 3.57% with a short circuit current density (Jsc) of 20.33 mA cm−2, open-circuit voltage (Voc) of 0.37 V, fill factor (FF) of 0.47, as well as a conductivity of 2.08 × 10−2 S cm−1.

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