NbO2 as a Noble Zero-Strain Material for Li-Ion Batteries: Electrochemical Redox Behavior in a Nonaqueous Solutionopen access
- Authors
- Kim, Yang-Soo; Cho, Yonghoon; Nogales, Paul M.; Jeong, Soon-Ki
- Issue Date
- 1-Aug-2019
- Publisher
- Multidisciplinary Digital Publishing Institute (MDPI)
- Keywords
- zero-strain material; NbO2; negative electrode; lithium-ion battery; energy storage; battery lifetime
- Citation
- Energies, v.12, no.15
- Journal Title
- Energies
- Volume
- 12
- Number
- 15
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/4316
- DOI
- 10.3390/en12152960
- ISSN
- 1996-1073
- Abstract
- 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.
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Collections - SCH Media Labs > Department of Energy Systems Engineering > 1. Journal Articles
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