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Structural effects on Pseudocapacitive response in Manganese oxide (MnO2) super capacitive system

Madireddy, Sai Sidhardha
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1479476408027058

Abstract Details

2016, MS, University of Cincinnati, Engineering and Applied Science: Materials Science.
Electrochemical Super capacitors are high energy storage devices and the charge storage occurrence is due to double layer and pseudocapacitance phenomenon. These electrostatic and electrochemical phenomena aid for the production and storage of energy in eco-friendly way. The current study tries to explain the structural dependence on the capacitive behavior of Manganese oxide (MnO2) electrodes. Manganese Oxide powders were produced in three different ways namely co-precipitation technique, modified Sol-gel technique and by reduction of potassium permanganate. Structural and microstructural features of the powders produced were compared and are correlated to the capacitive behavior of the material. In the co-precipitation technique we stabilized a- MnO2 phase which was believed to have double chain of edge sharing MnO6 octahedron structure connected at the corners to give (2x2) and (1x1) tunnels. The powders obtained were heat treated at different temperatures to make them conductive enough for super capacitive application. Composite films of these powders with PEO/Graphite were made using a novel technique called Partial Solution Mixing. Electrochemical tests were then performed on these powders using the Three Electrode Gamry setup. Structural and microstructural analysis was performed on the powders using XRD, SEM and EDS techniques and was correlated to the super capacitive behavior. This study explains the structural dependence on the capacitive behavior of the MnO2 powders produced and also gives an optimum way of producing a- MnO2 powders which were proved to be the best suited phase for super capacitive behavior.
Relva Buchanan, Sc.D. (Committee Chair)
Mark Schulz, Ph.D. (Committee Member)
Vesselin Shanov, Ph.D. (Committee Member)
108 p.
Materials Science

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Citations

  • Madireddy, S. S. (2016). Structural effects on Pseudocapacitive response in Manganese oxide (MnO2) super capacitive system [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1479476408027058

    APA Style (7th edition)

  • Madireddy, Sai Sidhardha. Structural effects on Pseudocapacitive response in Manganese oxide (MnO2) super capacitive system. 2016. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1479476408027058.

    MLA Style (8th edition)

  • Madireddy, Sai Sidhardha. "Structural effects on Pseudocapacitive response in Manganese oxide (MnO2) super capacitive system." Master's thesis, University of Cincinnati, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1479476408027058

    Chicago Manual of Style (17th edition)

ucin1479476408027058
326
© 2016, some rights reserved.Creative Commons License Structural effects on Pseudocapacitive response in Manganese oxide (MnO2) super capacitive system by Sai Sidhardha Madireddy is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Cincinnati and OhioLINK.