Effect of calcination temperature on electrochemical performance of niobium oxides/carbon composites

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F22%3A63550798" target="_blank" >RIV/70883521:28610/22:63550798 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/article/10.1007%2Fs10853-022-06931-4" target="_blank" >https://link.springer.com/article/10.1007%2Fs10853-022-06931-4</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10853-022-06931-4" target="_blank" >10.1007/s10853-022-06931-4</a>

Result language
angličtina
Original language name
Effect of calcination temperature on electrochemical performance of niobium oxides/carbon composites
Original language description
Orthorhombic niobium pentoxide (T-Nb2O5) possesses an intercalation pseudocapacitive behavior, which is a promising candidate of high-rate anodes for Li-ion capacitors. However, its low electric conductivity hinders the realization of this property. In our study, niobium oxides/carbon composites were prepared by calcinating a niobium peroxo-PAA complex (NbPAA) precursor to improve the electric conductivity. It has been found that the calcination temperature played an important role on the chemical compositions of obtained composites. A reduction phenomenon of niobium oxides by carbon was observed at high temperatures. At the medium temperature of 900 °C, the sample was composed of T-Nb2O5, monoclinic Nb2O5 (M-Nb2O5), amorphous carbon and niobium dioxide (NbO2). Due to the high conductivity of carbon, semi-conductivity of NbO2, and high specific capacity of M-Nb2O5, this sample exhibits a good specific capacity of 142 mAh g−1 (0.25 C) and a high-rate capability (capacity retention of 33.1%, 0.25 C to 25 C). It could be used as one of high-rate anodes for Li-ion capacitors.
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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