Single-Walled Carbon Nanotube Dispersion as Conductive Additive for Silicon-Based Lithium-Ion Batteries
<p id="p1">Silicon anode has recently been applied to lithium-ion batteries (LiBs) for electric vehicles (EVs), in order to improve energy density and rate capability. However, the swelling problem of the silicon anode occurs during the charging and discharging cycles. As a result, the cycle life of...
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| Autores principales: | , , |
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| Formato: | Capítulo de libro |
| Lenguaje: | inglés |
| Publicado: |
IntechOpen
2024
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| Materias: | |
| Acceso en línea: | https://www.intechopen.com/chapters/89336 |
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| Sumario: | <p id="p1">Silicon anode has recently been applied to lithium-ion batteries (LiBs) for electric vehicles (EVs), in order to improve energy density and rate capability. However, the swelling problem of the silicon anode occurs during the charging and discharging cycles. As a result, the cycle life of a battery is drastically decreased by increasing silicon loading in the anode electrode. Here we demonstrate high-quality single-walled carbon nanotube(SWCNT) dispersion as a conductive additive, in order to solve the swelling problem and thus realize long cycle life of high-energy-density battery, including silicon anode. Water-based SWCNT dispersion (0.4 wt%) is developed by mechanical separation and chemical stabilization. It forms mesh-like 3-dimension electromechanical networks over the silicon-based anode electrode. The electrode, including flexible SWCNT fibers, becomes more elastic and strong, unlike rigid multi-walled carbon nanotube (MWCNT). Therefore, the swelling problem of the silicon anode can be only solved by adding SWCNT dispersion, but not MWCNT. As a result, the cycle life of the silicon-based battery for high energy density is dramatically improved. Especially, SWCNT dispersion achieves 83% higher cycle life than MWCNT. It is revealed that the high-quality SWCNT dispersion provides great potential for high energy density and rate capability for EV batteries.</p> |
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| ISBN: | 978-0-85014-357-7 |
| DOI: | 10.5772/intechopen.114866 |