Novel silicon-tungsten oxide-carbon composite as advanced negative electrode for lithium-ion batteries
- Authors
- Kim, Hyun-seung; Kim, Jongjung; Lee, Jae Gil; Ryu, Ji Heon; Kim, Jaekwang; Oh, Seung M.; Yoon, Songhun
- Issue Date
- Jan-2018
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Alloying reaction; Negative electrode; Conversion reaction; Tungsten oxide; Chemical synthesis
- Citation
- SOLID STATE IONICS, v.314, pp 41 - 45
- Pages
- 5
- Journal Title
- SOLID STATE IONICS
- Volume
- 314
- Start Page
- 41
- End Page
- 45
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/1394
- DOI
- 10.1016/j.ssi.2017.11.013
- ISSN
- 0167-2738
1872-7689
- Abstract
- A cheap Si powder byproduct from solar cell production was applied as a negative electrode for lithium-ion batteries. To improve the cycle and rate performances, the as-obtained Si powder was composited with tungsten oxide and coated with carbon, in sequence. After preparing the composite material, its electrochemical performance is evaluated, which exhibits a high reversible capacity of 975 mA h g(-1) with improved cycleability. Especially, the rate capability is significantly improved to 390 mA h g(-1) under 1000 mA g(-1) applied current. This advanced electrochemical performance is attributed to the matrix effect of the formed Li2O and W metal with carbon coating, as identified using ex-situ X-ray diffraction experiments, and associated with the low polarization resistance observed in the galvanostatic charge intermittent technique.
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Collections - College of ICT Engineering > School of Integrative Engineering > 1. Journal Articles
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