scholarly journals Electrical and Optical characterization of Malonic acid doped Poly Vinyl Alcohol polymer electrolytes

2021 ◽  
pp. 246-254
Keyword(s):  
Electrical Conductivity ◽  
Optical Absorption ◽  
Malonic Acid ◽  
Vinyl Alcohol ◽  
Solid Polymer ◽  
Poly Vinyl Alcohol ◽  
Charge Transfer Complexes ◽  
Electrolyte Membranes ◽  
Maximum Conductivity ◽  
Solution Cast

Novel proton conducting solid polymer electrolyte membranes based on Poly vinyl alcohol (PVA) with Malonic Acid as dopant are prepared by solution cast technique with varying doping concentrations up to 40 wt.%. The electrical conductivity and optical absorption of pure PVA and Malonic aciddoped PVA electrolytes are investigated. DC conductivity behavior is studied in the range 303K to 373K. It is found that PVA: Malonic acid (70:30) electrolyte exhibits the maximum conductivity. The electrical conductivity initially increases with increasing dopant concentration and then showed a decrease beyond 30 wt.% concentration. The increase in conductivity is attributed to formation of charge transfer complexes while the decrease for concentrations above 30 wt.% is due to segregation. Optical absorption studies are made in the wavelength range 200-600 nm and the values of optical band gap (direct and indirect) are estimated. The results obtained are presented and discussed.

scholarly journals Mechanical Integrity Degradation and Control of All-Solid-State Lithium Battery with Physical Aging Poly (Vinyl Alcohol)-Based Electrolyte

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1886
Author(s):  
Yaolong He ◽  
Shufeng Li ◽  
Sihao Zhou ◽  
Hongjiu Hu
Keyword(s):  
Solid State ◽  
Aging Time ◽  
Vinyl Alcohol ◽  
Physical Aging ◽  
Rupture Strength ◽  
Superposition Principle ◽  
Solid Polymer ◽  
Poly Vinyl Alcohol ◽  
Characteristic Relaxation Time ◽  
Mechanical Integrity

Ensuring the material durability of an electrolyte is a prerequisite for the long-term service of all-solid-state batteries (ASSBs). Herein, to investigate the mechanical integrity of a solid polymer electrolyte (SPE) in an ASSB upon electrochemical operation, we have implemented a sequence of quasi-static uniaxial tension and stress relaxation tests on a lithium perchlorate-doped poly (vinyl alcohol) electrolyte, and then discussed the viscoelastic behavior as well as the strength of SPE film during the physical aging process. On this basis, a continuum electrochemical-mechanical model is established to evaluate the stress evolution and mechanical detriment of aging electrolytes in an ASSB at a discharge state. It is found that the measured elastic modulus, yield stress, and characteristic relaxation time boost with the prolonged aging time. Meanwhile, the shape factor for the classical time-decay equation and the tensile rupture strength are independent of the aging history. Accordingly, the momentary relaxation modulus can be predicted in terms of the time–aging time superposition principle. Furthermore, the peak tensile stress in SPE film for the full discharged ASSB will significantly increase as the aging proceeds due to the stiffening of the electrolyte composite. It may result in the structure failure of the cell system. However, this negative effect can be suppressed by the suggested method, which is given by a 2D map under different lithiation rates and relative thicknesses of the electrolyte. These findings can advance the knowledge of SPE degradation and provide insights into reliable all-solid-state electrochemical device applications.

Solid polymer electrolytes with poly(vinyl alcohol) and piperidinium based ionic liquid for Li-ion batteries

2019 ◽  
Vol 333 ◽  
pp. 76-82 ◽  
Author(s):  
Vijay Shankar Rangasamy ◽  
Savitha Thayumanasundaram ◽  
Jean-Pierre Locquet
Keyword(s):  
Ionic Liquid ◽  
Polymer Electrolytes ◽  
Vinyl Alcohol ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Poly Vinyl Alcohol ◽  
Li Ion Batteries ◽  
Li Ion

Nano composite solid polymer electrolytes based on biodegradable polymers starch and poly vinyl alcohol

Measurement ◽  
2016 ◽  
Vol 82 ◽  
pp. 490-499 ◽  
Author(s):  
B. Chatterjee ◽  
Niharika Kulshrestha ◽  
P.N. Gupta
Keyword(s):  
Biodegradable Polymers ◽  
Polymer Electrolytes ◽  
Vinyl Alcohol ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Poly Vinyl Alcohol ◽  
Nano Composite ◽  
Composite Solid

Investigation of Electrical Properties, Structure and Morphological Characterization of Mg+2 Ions Conducting Solid Polymer Electrolyte Based on Poly(vinyl alcohol)

2017 ◽  
Vol 6 (1) ◽  
pp. 102-107 ◽  
Author(s):  
Reda Khalil ◽  
Eslam Mohamed Sheha ◽  
Alaa Eid
Keyword(s):  
Polymer Electrolyte ◽  
Vinyl Alcohol ◽  
Solid Polymer Electrolyte ◽  
Transference Number ◽  
Morphological Characterization ◽  
Solid Polymer ◽  
Poly Vinyl Alcohol ◽  
Casting Technique ◽  
Ionic Transference Number ◽  
Electrolyte Component

In the present work, solid polymer electrolyte using poly(vinyl alcohol) (PVA) and magnesium perchlorate (Mg(ClO4)2) in different compositions has been prepared by the solution-casting technique method. Surface feature of films was characterized by scanning electron microscopy (SEM) measurement. X-ray diffraction (XRD) was used to determine the complexation of the polymer with the salt. The electrophysical characteristics were measured and analyzed as dependent on the concentration, nature of the solid polymer electrolyte component and ambient temperature. A maximum ionic conductivity value of ∼10–4 S/cm at 303 K is obtained for PVA0.6/(Mg(ClO4)2)0.4 composite. The ionic transference number of Mg+2 mobile ions has been estimated by a dc polarization method. The result reveals that the conducting species are predominantly ions.

Graphene oxide-assisted preparation of poly(vinyl alcohol)/carbon nanotube/reduced graphene oxide nanofibers with high carbon content by electrospinning technology

RSC Advances ◽  
2015 ◽  
Vol 5 (111) ◽  
pp. 91878-91887 ◽  
Author(s):  
Song Yao ◽  
Yanbao Li ◽  
Zhihang Zhou ◽  
Haichen Yan
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Carbon Nanotube ◽  
Carbon Content ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
High Electrical Conductivity ◽  
High Carbon ◽  
High Carbon Content ◽  
Reduced Graphene

Electrospun PVA/RGO/MWCNT nanofibers with high carbon content prepared via a well-dispersed MWCNT/PVA solution with a assistance of GO have a relatively high electrical conductivity.

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