Carbon coating on Nb20s for high-rate anode for Li-ion capacitors
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F21%3A63546238" target="_blank" >RIV/70883521:28610/21:63546238 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Carbon coating on Nb20s for high-rate anode for Li-ion capacitors
Original language description
Fast charging/discharging capability is one of the key parameters for next-generation energy storage devices. Li-ion capacitors have been proposed as an altemative approach to overcome the low energy density of conventional electrochemical double layer capacitors (EDLCs). A higher energy density could be achieved by replacing ·one activated carbon electrode with a Li-ion insertion/deinsertion electrode, which has a much higher specific capacity. The selection of this type of electrodes for Li-ion capacitors is the key to achieve desired performances. Nb2Os are one ofthe promising high-power anode materials. The Nb2Os based Li-ion capacitors working in the safe voltage range are :free of the potential safety problems associated with the electrolyte decomposition, which can result in stable cycle life. However, further progress ofNb2Os anodes for practical applications faces challenges due to their intrinsic poor electric conductivity (~3x10-6 S cm-1). In this study, polyaniline (PANI) was coated on Nb2Os particles. After the carbonization, Nb2O5/Carbon composites were obtained with different carbon contents. They were investigated through various tools such as electron microscopes and X-ray dif:fraction. Their electrochemical performance was tested in coin cell 2032 with the lithium anode. As a result, the application of carbon enhances the rate capability ofthe cell. However, the optimization of carbon content was necessary.
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
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OECD FORD branch
10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
Result continuities
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)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů