Investigating the Influence of Sodium Preintercalation on the Electrochemical Behavior of Ultrathin MnO2 Nanowires for Enhanced Supercapacitor Performance
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F24%3AA25037US" target="_blank" >RIV/61988987:17310/24:A25037US - isvavai.cz</a>
Result on the web
<a href="https://pubs.acs.org/doi/10.1021/acs.energyfuels.3c04027" target="_blank" >https://pubs.acs.org/doi/10.1021/acs.energyfuels.3c04027</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.energyfuels.3c04027" target="_blank" >10.1021/acs.energyfuels.3c04027</a>
Alternative languages
Result language
angličtina
Original language name
Investigating the Influence of Sodium Preintercalation on the Electrochemical Behavior of Ultrathin MnO2 Nanowires for Enhanced Supercapacitor Performance
Original language description
We have successfully synthesized bare and Na+ preintercalated MnO2 nanowires (NWs) (NaxMnO2, x = 0.05, 0.1, and 0.15) using a facile hydrothermal method. Supercapacitors are the state-of-the-art technology to overcome the global energy crisis, owing to their fast charging/discharging rates and higher power density. One-dimensional morphology (nanorods, nanowires, etc.) boosts the inherent low conductivity of transition metal oxides including MnO2 by confining charge transport only in one direction. Here, we have preintercalated Na+ ions into MnO2 nanowires (NWs) as a conductivity booster as well as a tunnel-stabilizing agent for alpha-MnO2. Morphological analysis reveals that nanowires have <50 nm diameter and their surface gets cracked with Na+ preintercalation, offering a less dead area. Linear sweep voltammetry (LSV) results revealed an increase in oxygen evolution overpotential by Na+ preintercalation, which can enable the supercapacitor to operate at an extended potential window. Na+ preintercalation and control on morphology not only increased the conductivity but also shielded the electrode pulverization against tedious charging/discharging cycles and reduced the electrolyte diffusion pathway. These features enabled Na0.10MnO2 NWs to exhibit a specific capacitance of 1061 F g(-1)@1 A g(-1) and an excellent rate capability of 85.6% at 9 A g(-1) along with 95.9% capacitance retention after 6000 charging-discharging cycles at 12 A g(-1) current density. This study showed that Na+ preintercalation in MnO2 could improve the electrochemical performance and open up new horizons to manufacture high-performance next-generation supercapacitors.
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
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ENERG FUEL
ISSN
0887-0624
e-ISSN
1520-5029
Volume of the periodical
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Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
15
Pages from-to
5506-5521
UT code for WoS article
001181858100001
EID of the result in the Scopus database
2-s2.0-85187372782