Vertically aligned MnO2 nanosheet electrode of controllable mass loading, counter to nanoparticulate carbon film electrode for use in supercapacitor
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F21%3AA2302HRR" target="_blank" >RIV/61988987:17310/21:A2302HRR - isvavai.cz</a>
Result on the web
<a href="https://www.webofscience.com/wos/woscc/full-record/WOS:000599937300003" target="_blank" >https://www.webofscience.com/wos/woscc/full-record/WOS:000599937300003</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Vertically aligned MnO2 nanosheet electrode of controllable mass loading, counter to nanoparticulate carbon film electrode for use in supercapacitor
Original language description
MnO2 electrode with nanosheet morphology, counter to carbon electrode in a supercapacitor shows promise for energy storage application. In this investigation, film electrodes of Mn-oxide and carbon with much higher and controllable mass loadings are grown by electrospray of respective precursors on Ni foam substrates. The electrospray deposition is conducted at room temperature to simplify the procedure. The evolution of nanosheet morphology of the Mn-oxide film due to electrochemical oxidation of Mn (II, III) to Mn (IV) valence state, implemented by multiple cyclic voltammetry (mCV) cycles on the calcined film is studied here. The CV and the charge-discharge curve show near-ideal behaviour with 0.5 M K2SO4 as electrolyte in asymmetric set-up, logging a capacitance of 115 F g(-1) at 1 mA cm(-2). The capacitance is retained to 93% of initial value after 5000 cycles at 20 mA cm(-2). The specific energy and power are found to the levels of 62.3 Wh kg(-1) and 5.2 kW kg(-1) respectively, which appear promising in comparison to the values, reported in literature. The increase in calcination temperature from 350 degrees C to 500 degrees C resulted in interspersed agglomeration within nanosheet morphology after mCV cycles, and consequent loss of capacitance.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10400 - Chemical sciences
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Energy Storage
ISSN
2352-152X
e-ISSN
2352-152X
Volume of the periodical
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Issue of the periodical within the volume
101851
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
9
Pages from-to
33-41
UT code for WoS article
000599937300003
EID of the result in the Scopus database
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