Browsing by Author "Bhatt, Chandni"

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Correlation of ion-ion interaction with electrical conductivity in solid state polymeric separator for energy storage applications
(American Institute of Physics Inc., 2016) Sharma, Parul Kumar; Sadiq, M.; Bhatt, Chandni; Sharma, A. L.
In the present study, we report innovative study on the prepared high quality solid state free standing thin polymeric separator. In prepared free standing polymeric separator, polymer (PEO) has been used as host matrix; appropriate bulky anion salt (LiPF6) as conducting species and Nano ceramic filler (BaTiO3) is used to enrich the mechanical and thermal stability of separator used for the device applications. The Fourier Transform Infra-Red (FTIR) result has been analysed properly of the prepared materials to look the microscopic interaction among polymer-ion, ion-ion and polymer-ion-clay interaction. Electrical conductivity results has been recorded using the impedance spectroscopy results which gives the estimated value of the order of ?10-3 Scm-1 of the nano ceramic doped polymeric separator which is desirable for energy storage application. A fine correlation has been established between the obtained results by this two analysis. ? 2016 Author(s).
Effect of Nano-Filler on the Properties of Polymer Nanocomposite Films of PEO/PAN Complexed with NaPF 6
(Journal of Materials Science and Engineering B 5, 2016) Bhatt, Chandni; Swaroop, Ram; Arya, Anil; Sharma, A. L.
Free standing transparent PNC (Polymer nanocomposite) films based on PEO/PAN + NaPF 6 with different concentration (wt./wt.) filler of nano sized (TiO 2 ) is synthesized by using standard solution cast technique. HRXRD (High resolution X -ray diffraction) and FESEM (Field emission scanning electron microscopy) have been performed to see the structural and microstructural behavior of the PNC films. The microscopic interaction among polymer, salt and nano-ceramic filler has been analyzed by FTIR (Fourier transformed infra-red) spectroscopy. The reduction of ion pair formation in polymeric separator is clearly observed on addition of nano-filler in the polymer salt complex film. Electrical (ionic/electronic) conductivity has been estimated (~ 10 -4 S/cm) optimized PNC films concentration of nanofiller (15 Wt.%). The estimated value of electrical conductivity is well corroborated by FTIR study. Thermal analysis has been done with thermo gravimetry analysis to find out thermal stability of PNC films. Transport properties associated due to majority mobile carriers ions and only negligible participation from electrons was observed through transport number analysis. The band gap (i.e. direct as well as indirect) decreases on the addition of nano-filler observed from the optical analysis. The estimated result of the prepared PNC films are at par with desired value for the device application.
Sodium-Ion-Conducting Polymer Nanocomposite Electrolyte of TiO 2 /PEO/PAN Complexed with NaPF 6
(AIP Publishing, 2016) Bhatt, Chandni; Swaroop, Ram; Sharma, Parul Kumar; Sharma, A. L.
A free standing transparent of state based on PEO/PAN+NaPF6 with different compositions of nano sized TiO2 in weight percent (x = 0, 1, 2, 5, 10, 15, 20) is synthesized by using standard cast technique. The homogeneous of above composition is examined by FESEM. The microscopic interaction among salt and nanoceramic filler has been analyzed by Fourier Transformed Infra-Red spectroscopy. The reduction of ion pair formation in polymeric separator is clearly observed on addition of nanofiller in the salt complex Electrical conductivity has been recorded of the prepared polymeric separator which is of the order of ∼10−4 Scm−1 after addition of nanofiller (15% wt/wt) which support the results. Electrochemical potential window has been observed of the order of ∼6V by the cyclic voltammetry results. The observed data of the prepared separator are at par with the desirable value for device applications
Structural and electrical properties of polymer nanocomposite films
(Springer Science and Business Media, LLC, 2017) Bhatt, Chandni; Swaroop, Ram; Sharma, Achchhe Lal
A free standing transparent film of solid state polymer electrolyte based on PEMA/PVC+NaPF6 with different compositions of nano sized TiO2 in weight percent (x = 0, 1, 2, 7, 10, 15, 20) is synthesized by using standard solution cast technique. The homogeneous surface of above polymer composition is examined by FESEM. The microscopic interaction among polymer, salt and nano-ceramic filler has been analyzed by Fourier Transformed Infra-Red (FTIR) spectroscopy. The reduction of ion pair formation in polymeric separator is clearly observed on addition of nano-filler in the polymer salt complex film. Electrical conductivity has been recorded of the prepared polymeric separator which is of the order of *1.5 × 10−5 Scm−1 10?5Scm?1 after addition of nano-filler (15 % wt/wt) which support the FTIR results. Electrochemical potential window has been observed of the order of ~6 V by the cyclic voltammetry results. The observed data of the prepared separator are at par with the desirable value for device application. - Springer International Publishing Switzerland - 2017.