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392 results on '"Srivastava, Monika"'

36. Analysis and Parameter Estimation of Microstrip Circular Patch Antennas Using Artificial Neural Networks

Author

Srivastava, Monika, Saini, Savita, Thakur, Anita, Kacprzyk, Janusz, Series editor, Pal, Nikhil R., Advisory editor, Bello Perez, Rafael, Advisory editor, Corchado, Emilio S., Advisory editor, Hagras, Hani, Advisory editor, Kóczy, László T., Advisory editor, Kreinovich, Vladik, Advisory editor, Lin, Chin-Teng, Advisory editor, Lu, Jie, Advisory editor, Melin, Patricia, Advisory editor, Nedjah, Nadia, Advisory editor, Nguyen, Ngoc Thanh, Advisory editor, Wang, Jun, Advisory editor, Pant, Millie, editor, Ray, Kanad, editor, Sharma, Tarun K., editor, Rawat, Sanyog, editor, and Bandyopadhyay, Anirban, editor

Published
2018
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46. Influence of Carbon Black on Conductivity and Structure of Polyethylene Oxide Based Polymer Electrolyte Film.

Author

Negi, Shubham Singh, Rawat, Suneyana, Singh, Pramod K., Pandey, Shri Prakash, Yadav, Tarun, Srivastava, Monika, and Singh, Ram Chandra

Subjects
POLYELECTROLYTES, POLYETHYLENE oxide, POLYMER films, IONIC conductivity, CONDUCTIVITY of electrolytes, CARBON-black, CONDUCTING polymers
Abstract

The potential applications of carbon black are expected to grow as science and technology improve offering up new possibilities for innovation throughout disciplines included in the field of energy storage. The present work shows the influence of carbon black to improve the ionic conductivity of the polymer electrolyte. The synthesis of polyethylene oxide: ammonium iodide based polymer electrolyte incorporated with carbon black varying from 0.01 to 0.06 wt% with respect to PEO: NH4I system by solution casting method. Different characterizations like polarized optical microscopy (POM), impedance spectroscopy, and ionic transference number (tion) are studied in detail. The maximum ionic conductivity is achieved at 0.05 wt% carbon black shows 1.20 × 10−5 S cm−1 at ambient temperature. In accordance with POM data, the amorphous region has increased whereas the crystalline region has shrunk which further indicated the increase in ionic conductivity. The value of (tion) is calculated to be 0.97 which shows the system is ionic in nature. PEO based polymer electrolyte doped carbon black can be used for the fabrication of energy storage devices. [ABSTRACT FROM AUTHOR]

Published
2024
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47. Waste peanut shells derived activated carbon for dual electrochemical applications.

Author

Kumar, Sushant, Singh, Diksha, Singh, Abhimanyu, Srivastava, Monika, Kumar, Sandeep, Singh, Ritu, Yadav, Tarun, Alheety, Mustafa A., and Singh, Pramod K.

Subjects
PEANUT hulls, ACTIVATED carbon, CARBON-based materials, POLYMER colloids, POROSITY, CONDUCTING polymers, POLYELECTROLYTES, DYE-sensitized solar cells, DEIONIZATION of water
Abstract

In recent scenarios, plenty of research has been conducted on porous activated carbon derived from biowaste precursors. The well‐developed surface area and porous nature of biowaste‐derived activated carbon material make them good candidates for electrochemical devices to use as electrode material. In the present work, we have used waste peanut shells (W.P.) as a precursor material to derive large surface area activated carbon. Chemical activation is used to activate the activated carbon, for which ZnCl2 is used as an activating agent. The waste peanut shell‐derived activated carbon (WPAC) is studied via XRD, FESEM, and BET. Prepared carbon shows a large BET surface area of 1366 m2 g−1 and a well‐developed pore structure; the presence of pores is also confirmed by FESEM images. A solid‐state supercapacitor is also fabricated using waste peanut shell‐based activated carbon and ionic liquid‐based polymer electrolyte. The EDLC is further studied using electrochemical characterizations such as CV, EIS, and GCD. The EIS study found that the WPAC‐based EDLC cell shows a specific capacitance of 25 F/g at 10 mHz. A DSSC is also fabricated using the WPAC on the counter electrode, and it shows an efficiency of 0.96% with a fill factor of 27.79. [ABSTRACT FROM AUTHOR]

Published
2024
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