A Reduction Phenomenon Enhancing the Electrochemical Performance of Niobium based Oxides/Carbon Composite for Li-Ion Capacitors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F21%3A63546198" target="_blank" >RIV/70883521:28610/21:63546198 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

A Reduction Phenomenon Enhancing the Electrochemical Performance of Niobium based Oxides/Carbon Composite for Li-Ion Capacitors

Popis výsledku v původním jazyce

Fast charging/discharging capability is one of the key pararneters for next-generation energy storage devices 1• A Li-ion capacitor is a hybrid &lt;levice combined the electrodes ofLi-ion batteries and supercapacitors together to surpass the energy density of conventional supercapacitors and overcome the power density limitation of batteries2. To choose a proper battery-like electrode to match rapid non-Faradaic capacitive cathode should be considered. Li4TisO12 and Nb2Os are prornising high-power anode materials. Nb2Os is worthy of notice because ofits higher theoretical capacity ( ~200 mA h g-1) than that of conventional high-power electrodes (L????TisO12 and TiO2, ~170 mA h g-1). As Li4TisO12, Nb2Os works in the safe voltage range, free of the potential electrolyte decomposition. There are several crystalline Nb2Os. Orthorhombic Nb2Os is favorable for the reversible Li intercalation compared with other structure of Nb2Os, while monoclinic Nb2Os presents a higher specific capacity. However, further progress of Nb2Os anodes for practical applications faces challenges due to their intrinsic poor electric conductivity (~3xl 0-6 S cm-1) and the capacity decay from pulverization during the charge-discharge process. Hence, the modification and development of Nb2Os based anode for Li-ion capacitor are essentially necessary.

Název v anglickém jazyce

A Reduction Phenomenon Enhancing the Electrochemical Performance of Niobium based Oxides/Carbon Composite for Li-Ion Capacitors

Popis výsledku anglicky

Fast charging/discharging capability is one of the key pararneters for next-generation energy storage devices 1• A Li-ion capacitor is a hybrid &lt;levice combined the electrodes ofLi-ion batteries and supercapacitors together to surpass the energy density of conventional supercapacitors and overcome the power density limitation of batteries2. To choose a proper battery-like electrode to match rapid non-Faradaic capacitive cathode should be considered. Li4TisO12 and Nb2Os are prornising high-power anode materials. Nb2Os is worthy of notice because ofits higher theoretical capacity ( ~200 mA h g-1) than that of conventional high-power electrodes (L????TisO12 and TiO2, ~170 mA h g-1). As Li4TisO12, Nb2Os works in the safe voltage range, free of the potential electrolyte decomposition. There are several crystalline Nb2Os. Orthorhombic Nb2Os is favorable for the reversible Li intercalation compared with other structure of Nb2Os, while monoclinic Nb2Os presents a higher specific capacity. However, further progress of Nb2Os anodes for practical applications faces challenges due to their intrinsic poor electric conductivity (~3xl 0-6 S cm-1) and the capacity decay from pulverization during the charge-discharge process. Hence, the modification and development of Nb2Os based anode for Li-ion capacitor are essentially necessary.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

<a href="/cs/project/LTT20005" target="_blank" >LTT20005: Spolupráce s asociací EASE na vývoji hybridního superkapacitoru</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů