PVDF-HFP-NH4CF3SO3-SiO2 Nanocomposite Polymer Electrolytes for Protonic Electrochemical Cell

2011 ◽  
Vol 471-472 ◽  
pp. 373-378 ◽  
Author(s):  
N. Muda ◽  
Salmiah Ibrahim ◽  
Norlida Kamarulzaman ◽  
Mohamed Nor Sabirin
Keyword(s):  
Polymer Electrolyte ◽  
Polymer Electrolytes ◽  
Polyvinylidene Fluoride ◽  
Open Circuit ◽  
Electrochemical Cells ◽  
Scanning Calorimetry ◽  
Nanocomposite Polymer ◽  
Nanocomposite Polymer Electrolyte ◽  
Electrolyte Film ◽  
Nanocomposite Polymer Electrolytes

This paper describes the preparation and characterization of proton conducting nanocomposite polymer electrolytes based a polyvinylidene fluoride-co-hexapropylene (PVDF-HFP) for protonic electrochemical cells. The electrolytes were characterized by Differential Scanning Calorimetry (DSC) and Impedance Spectroscopy (IS). It is observed that the crystallinity of the PVDF-HFP-NH4CF3SO3 system slightly increase upon addition of SiO2 nanofiller. The PVDF-HFP-NH4CF3SO3-SiO2 electrolytes reveals the existence of two conductivity maxima at 1 and 4 wt% of SiO2 concentration attributed to two percolation thresholds in the nanocomposite polymer electrolyte. The optimum value of conductivity of 1.07 × 10-3 S cm-1 is achieved for the nanocomposite polymer electrolyte film with 1 wt% SiO2. Protonic electrochemical cells was fabricated with a configuration Zn + ZnSO4.7H2O + PTFE (anode) | PVDF-HFP:NH4CF3SO3+SiO2 (electrolyte) | MnO2 + PTFE (cathode). The maximum open circuit voltage (OCV) is ~1.50 V and discharge characteristics of the cell were studied at different loads of resistances.

Optimization of polymer electrolytes with the effect of concentration of additives in PEO-NH4HF2 polymer electrolytes

2020 ◽  
pp. 089270572093075
Author(s):  
Jitender Paul Sharma ◽  
Neelam Guleria
Keyword(s):  
Activation Energy ◽  
Dielectric Constant ◽  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Polymer Electrolytes ◽  
Fumed Silica ◽  
Room Temperature ◽  
Testing Machine ◽  
Scanning Calorimetry ◽  
Nanocomposite Polymer

In the present work, nanocomposite polymer electrolyte films were prepared by solution casting technique using nanosized fumed silica to polyethylene oxide (PEO)-based polymer electrolytes containing ammonium bifluoride (NH4HF2). The ionic conductivity of 1.19 × 10−5 S cm−1 has been observed at room temperature (25°C) for 3 wt% fumed silica in PEO-10 wt% NH4HF2 polymer electrolytes after which the conductivity was observed to decrease. Furthermore, the addition of high dielectric constant plasticizer propylene carbonate (PC) in the optimized composition of nanocomposite polymer electrolytes has increased the number of charge carriers by the large dissolution of ionic salt, amorphous content, and hence the ionic conductivity. Maximum ionic conductivity obtained at room temperature was found to be 1.55 × 10−4 S cm−1 in the case of PEO-10 wt% NH4HF2-3 wt% fumed silica-0.3 (ml) PC polymer electrolytes which is five orders of magnitude higher than that of the polymer host material. Temperature-dependent ionic conductivity, activation energy, and dielectric constant studies have been described for all the compositions of polymer electrolytes. Ionic conductivity and dielectric constant studies were determined from impedance data. Polymer electrolytes containing both fumed silica and PC highlight that there is no phase transition in the polymer electrolyte and temperature dependence of ionic conductivity in the temperature range is of almost Arrhenius type. The lowest activation energy value for the highest conducting polymer electrolyte was found to be 0.172 eV. Change in melting temperature, % crystallinity ( χ c), and mechanical properties have also been observed in polymer electrolytes containing fumed silica as well as PC as studied by Differential Scanning Calorimetry/Thermogravimetric Analysis (DSC/TGA) and universal testing machine, respectively.

SnO2-Nafion® nanocomposite polymer electrolytes for fuel cell applications

2014 ◽  
Vol 11 (9/10/11) ◽  
pp. 882 ◽  
Author(s):  
S. Brutti ◽  
R. Scipioni ◽  
M.A. Navarra ◽  
S. Panero ◽  
V. Allodi ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolytes ◽  
Nanocomposite Polymer ◽  
Nanocomposite Polymer Electrolytes

Nanocomposite polymer electrolytes based on poly(poly(ethylene glycol)methacrylate), MMT or ZSM-5 formulated with LiTFSI and PYR11TFSI for Li-ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (9) ◽  
pp. 7249-7259 ◽  
Author(s):  
J. Cardoso ◽  
A. Mayrén ◽  
I. C. Romero-Ibarra ◽  
D. P. Nava ◽  
J. Vazquez-Arenas
Keyword(s):  
Ethylene Glycol ◽  
Polymer Electrolytes ◽  
Li Ion Batteries ◽  
Poly Ethylene Glycol ◽  
Glycol Methacrylate ◽  
Nanocomposite Polymer ◽  
Li Ion ◽  
Nanocomposite Electrolytes ◽  
Poly Ethylene ◽  
Nanocomposite Polymer Electrolytes

Novel poly(poly(ethylenglycol)methacrylate) nanocomposite electrolytes based on montmorillonite and zeolite; and functionalized with LiTFSI and PYR11TFSI are synthetized for Li-ion batteries.

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.

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