Morphological transformations and electrochemical properties of hydrothermally synthesized MnO 2 nanostructures

A. J. Shahani, J. Wu, L. Wu, Q. Wang, X. D. Zhou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

MnO 2 nanostructures with various morphologies were synthesized by the hydrothermal method with control over the reaction temperature and dwell time. One dimensional (1D) nanoneedle structure can self-assemble to form three dimensional (3D) microspheres of MnO 2 nanoneedles at 95°C by extending the dwell time from 3 hours to 15 hours. Alternatively, the 3D microspheres of nanoneedles can transform into 1D nanobelts and nanorods by increasing the reaction temperature to 120°C and 165°C, respectively, while maintaining constant dwell time of 15 hours. The supercapacitance of these nanostructures shows strong morphology dependence, and nanobelts have the highest specific capacitance of 323.7 F g -1 .

Original languageEnglish
Title of host publicationSolid State Ionic Devices 8 - NEMCA
Pages185-193
Number of pages9
Edition40
DOIs
StatePublished - 1 Dec 2011
EventSolid State Ionic Devices 8 - NEMCA - 218th ECS Meeting - Las Vegas, NV, United States
Duration: 10 Oct 201015 Oct 2010

Publication series

NameECS Transactions
Number40
Volume33
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

ConferenceSolid State Ionic Devices 8 - NEMCA - 218th ECS Meeting
CountryUnited States
CityLas Vegas, NV
Period10/10/1015/10/10

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    Shahani, A. J., Wu, J., Wu, L., Wang, Q., & Zhou, X. D. (2011). Morphological transformations and electrochemical properties of hydrothermally synthesized MnO 2 nanostructures In Solid State Ionic Devices 8 - NEMCA (40 ed., pp. 185-193). (ECS Transactions; Vol. 33, No. 40). https://doi.org/10.1149/1.3589196