NbO2 as a Noble Zero-Strain Material for Li-Ion Batteries: Electrochemical Redox Behavior in a Nonaqueous Solution
| Autor: | Yang-Soo Kim, Paul Maldonado Nogales, Yong Hoon Cho, Soon-Ki Jeong |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Control and Optimization
Materials science Energy Engineering and Power Technology chemistry.chemical_element NbO2 02 engineering and technology lithium-ion battery 010402 general chemistry Electrochemistry 01 natural sciences Redox negative electrode lcsh:Technology Energy storage Lithium-ion battery Ion Electrical and Electronic Engineering Engineering (miscellaneous) Renewable Energy Sustainability and the Environment energy storage lcsh:T battery lifetime 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical engineering Electrode Lithium zero-strain material 0210 nano-technology Faraday efficiency Energy (miscellaneous) |
| Zdroj: | Energies, Vol 12, Iss 15, p 2960 (2019) |
| ISSN: | 1996-1073 |
| Popis: | Lithium-ion batteries are widely available commercially and attempts to extend the lifetime of these batteries remain necessary. The energy storage characteristics of NbO2 with a rutile structure as a material for the negative electrode of lithium-ion batteries were investigated. When negative potential was applied to the NbO2 electrode during application of a constant current in a nonaqueous solution containing lithium ions, these ions were inserted into the NbO2. Conversely, upon application of positive potential, the inserted lithium ions were extracted from the NbO2. In situ X-ray diffraction results revealed that the variation in the volume of NbO2 accompanying the insertion and extraction of lithium was 0.14%, suggesting that NbO2 is a zero-strain (usually defined by a volume change ratio of 1% or less) active material for lithium-ion batteries. Moreover, the highly stable structure of NbO2 allows the corresponding electrode to exhibit excellent cycling performance and coulombic efficiency. |
| Databáze: | OpenAIRE |
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