Oxygen-vacancy and phosphorus-doping enriched NiMoO4 nanoarrays for high-energy supercapacitors

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F22%3A63558918" target="_blank" >RIV/70883521:28610/22:63558918 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S2352152X22013123?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2352152X22013123?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.est.2022.105314" target="_blank" >10.1016/j.est.2022.105314</a>

Result language
angličtina
Original language name
Oxygen-vacancy and phosphorus-doping enriched NiMoO4 nanoarrays for high-energy supercapacitors
Original language description
Exploring electrode materials with high effective surface and abundant active sites takes on a critical significance in achieving high-energy supercapacitors. Herein, the oxygen vacancies (Ov) and P-doping enriched NiMoO4 nanosheet arrays were synthesized through the combination of phosphorization and N2 plasma treatment. The combination strategy makes it possible to sharply increase and modulate the Ov content. The optimized P-NiMoO4-N2 is found with the highest Ov content, and the capacitive activity is well consistent with the increase in the Ov content among all samples. As revealed by experimental results, rich Ov increases the electrochemically accessible active-sites while enhancing the intrinsic conductivity. Thus, the optimized P-NiMoO4-N2 is enabled to reach a high capacity of 2180 F g−1 at a current density of 1 A g−1 and remains 83.9 % at 10 A g−1 with high cycling stability. After being assembled with activated carbon as the negative electrode, the asymmetric supercapacitor exhibits a high energy density of 56.8 Wh kg−1 at 0.75 kW kg−1 and maintains 41.6 Wh kg−1 at 15 kW kg−1. This work may create a novel path to enrich and adjust Ov in metal oxides for high-capacity and high-power supercapacitors.
Czech name
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Czech description
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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
10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project
<a href="/en/project/LTT20005" target="_blank" >LTT20005: Cooperation with EASE on the development of hybrid supercapacitor</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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