NbO 2 as a Noble Zero-Strain Material for Li-Ion Batteries: Electrochemical Redox Behavior in a Nonaqueous Solution

Yang-Soo Kim, Yonghoon Cho, Paul M. Nogales and Soon-Ki Jeong
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Yang-Soo Kim: Jeonju Center, Korea Basic Science Institute, Jeonju 54907, Korea
Yonghoon Cho: Department of Energy Systems Engineering, Soonchunhyang University, Soonchunhyang-ro 22-gil, Sinchang-myeon, Asan-si, Chungcheongnam-do 31538, Korea
Paul M. Nogales: Department of Energy Systems Engineering, Soonchunhyang University, Soonchunhyang-ro 22-gil, Sinchang-myeon, Asan-si, Chungcheongnam-do 31538, Korea
Soon-Ki Jeong: Department of Energy Systems Engineering, Soonchunhyang University, Soonchunhyang-ro 22-gil, Sinchang-myeon, Asan-si, Chungcheongnam-do 31538, Korea

Energies, 2019, vol. 12, issue 15, 1-7

Abstract: Lithium-ion batteries are widely available commercially and attempts to extend the lifetime of these batteries remain necessary. The energy storage characteristics of NbO 2 with a rutile structure as a material for the negative electrode of lithium-ion batteries were investigated. When negative potential was applied to the NbO 2 electrode during application of a constant current in a nonaqueous solution containing lithium ions, these ions were inserted into the NbO 2 . Conversely, upon application of positive potential, the inserted lithium ions were extracted from the NbO 2 . In situ X-ray diffraction results revealed that the variation in the volume of NbO 2 accompanying the insertion and extraction of lithium was 0.14%, suggesting that NbO 2 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 NbO 2 allows the corresponding electrode to exhibit excellent cycling performance and coulombic efficiency.

Keywords: zero-strain material; NbO 2; negative electrode; lithium-ion battery; energy storage; battery lifetime (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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