| Download | - View accepted manuscript: Shortly-branched, linear dextrans as efficient binders for silicon/graphite composite electrodes in Li-ion batteries (PDF, 2.0 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1021/acs.iecr.8b01055 |
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| Author | Search for: Zhao, Xiuyun1; Search for: Yim, Chae-Ho1; Search for: Du, Naiying1; Search for: Abu-Lebdeh, Yaser1 |
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| Affiliation | - National Research Council of Canada. Energy, Mining and Environment
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| Format | Text, Article |
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| Abstract | There is a need for new binders that are compatible with both silicon and graphite to enable high energy density silicon/graphite composites for Li-ion batteries. In this work, we have evaluated the shortly-branched, linear polysaccharide dextran with graphite-rich composite electrode and battery testing shows a reversible capacity of about 525 mAh g-1 and an excellent cycling stability unlike the conventional poly(vinylidenefluoride) binder. A study of the interface using Impedance Spectroscopy, X-ray Photoelectron Spectroscopy, and post-mortem Scanning Electron Microscopy analysis shows that the superior performance of Dextran is due to the formation of a solid electrolyte interface layer that completely covers the surfaces of silicon and graphite due to a strong interaction between dextran’s hydroxyl or ethereal groups and silicon surface as evidenced by Infrared spectroscopy. This along with its low cost and environmental friendly nature makes it an attractive binder material for Si/graphite composite electrodes in Li-ion batteries. |
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| Publication date | 2018-06-11 |
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| Publisher | American Chemical Society |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 23003397 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | bc8ba98a-fb68-4f01-a068-3cac98275346 |
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| Record created | 2018-06-20 |
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| Record modified | 2020-06-03 |
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