In the present work, a polymer electrolyte blend containing polymers Poly ethylene oxide (PEO) and Poly (vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) was prepared. The polymer blend was complexed with potassium trifluoromethanesulfonate (KCF3SO3), and titanium oxide nanoparticles (TiO2) (10nm size) were dispersed in to the complex at different weight percentages. The conductivity due to ions in the blend is determined by Ac impedance measurements in the frequency range of 10Hz-1MHz. The nano composite polymer blend containing 5wt% of TiO2 shows a conductivity of 7.95×10−5Scm-1, which is almost 1.5 orders more than polymer electrolyte with PEO as a polymer. XRD studies show a decrease in the coherence length of XRD peaks on addition of nanoparticles, which is due to increase the amorphous phase in the systems. Temperature dependence conductivity studies of the systems shows that, activation energy decreases with increase in the percentage of nanoparticles in the blend.

Trifluoromethanesulfonate

Hexafluoropropylene

10.1063/1.5032607

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Photoluminescence and electrochemical properties of Samarium-doped SrO-BaO-Al2O3 nanocomposites synthesized through green solution…

Ceramics International (2024)

L.S. Manjunath H.C. Manjunatha Y.S. Vidya K.N. Sridhar R. Munirathnam

10.1016/j.ceramint.2024.11.060

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Effect of low energy oxygen ion beam irradiation on ionic conductivity of solid polymer electrolyte

AIP conference proceedings (2014)

H.C. Manjunatha G. N. Kumaraswamy R. Damle

Over the past three decades, solid polymer electrolytes (SPEs) have drawn significant attention of researchers due to their prospective commercial applications in high energy-density batteries, electrochemical sensors and super-capacitors. The optimum conductivity required for such applications is about 10−2 – 10−4 S/cm, which is hard to achieve in these systems. It is known that the increase in the concentration of salt in the host polymer results in a continuous increase in the ionic conductivity. However, there is a critical concentration of the salt beyond which the conductivity decreases due to formation of ion pairs with no net charge. In the present study, an attempt is made to identify the concentration at which ion pair formation occurs in PEO: RbBr. We have attempted to modify microstructure of the host polymer matrix by low energy ion (Oxygen ion, O+1 with energy 100 keV) irradiation. Ionic conductivity measurements in these systems were carried out using Impedance Spectroscopy before and after irradiation to different fluencies of the oxygen ion. It is observed that the conductivity increases by one order in magnitude. The increase in ionic conductivity may be attributed to the enhanced segmental motion of the polymer chains. The study reveals the importance of ion irradiation as an effective tool to enhance conductivity in SPEs.

10.1063/1.4872963

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Study of gamma/X-ray interaction in some diodes and transistors

International Journal of Nuclear Energy Science and Technology (2017)

Chikka Hanumantharayappa K.N. Sridhar H.C. Manjunatha L. Seenappa

We have studied the gamma radiation effects by computing the parameters such as mass attenuation coefficient (MAC), linear attenuation coefficient (LAC), half value layer (HVL), tenth value layer (TVL) and electric conductivity for different types of diodes and transistors, such as small outline transistor. Among the all studied diodes, the diode DO-41 is less sensitive and the diode SOT-323 single diode is more sensitive to gamma radiation compared to other studied diodes. Among the all studied transistors, the transistor TO-220 is less sensitive and the transistor SOT-323 is more sensitive to gamma radiation compared to other studied transistors. The conductivities of transistor and diodes are not constant when they are exposed to high gamma dose. The conductivity varies with the energy of gamma radiation. This work is useful in the selection of electronic equipment in the fields of aerospace, nuclear reactor and weapons communities and particle accelerators.

10.1504/ijnest.2017.10011839

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Influence of Cr3＋ doping on oxygen evolution reaction kinetics and photoluminescence properties of ZnSnO3 nanoparticles

Materials Science and Engineering B (2024)

Vishwalinga Prasad B.C. Ningappa H.C. Manjunatha Y.S. Vidya S. Manjunatha

Oxygen evolution

10.1016/j.mseb.2024.117685

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Modification in the transport and morphological properties of solid polymer electrolyte system by low-energy ion irradiation

Ionics (2018)

H.C. Manjunatha R. Damle Kumar Pravin G. N. Kumaraswamy

10.1007/s11581-018-2518-2

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Citations (20)