| DOI | Trouver le DOI : https://doi.org/10.1021/acsami.5b05718 |
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| Auteur | Rechercher : Li, B.; Rechercher : Li, Y.; Rechercher : Dai, D.; Rechercher : Chang, K.; Rechercher : Tang, H.; Rechercher : Chang, Z.; Rechercher : Wang, C.; Rechercher : Yuan, X.-Z.1; Rechercher : Wang, H.1 |
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| Affiliation | - Conseil national de recherches Canada. Énergie, les mines et l'environnement
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| Format | Texte, Article |
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| Sujet | polyolefin membranes; nonradiation; separator; high lithium-ion conductivity; lithium-ion battery |
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| Résumé | PolPolyolefin membranes are widely used as separators in commercialized Li-ion batteries. They have less polarized surfaces compared with polarized molecules of electrolyte, leading to a poor wetting state for separators. Radiation pretreatments are often adopted to solve such a problem. Unfortunately, they can only activate several nanometers deep from the surface, which limits the performance improvement. Here we report a facile and scalable method to polarize polyolefin membranes via a chemical oxidation route. On the surfaces of pretreated membrane, layers of poly(ethylene oxide) and poly(acrylic acid) can easily be coated, thus resulting in a high Li-ion conductivity of the membrane. Assembled with this decorated separator in button cells, both high-voltage (Li1.2Mn0.54Co0.13Ni0.13O2) and moderate-voltage (LiFePO4) cathode materials show better electrochemical performances than those assembled with pristine polyolefin separators. |
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| Date de publication | 2015 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 21277043 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | ef41fbb6-cc6b-4645-8fdc-eec93b108bf7 |
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| Enregistrement créé | 2015-11-10 |
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| Enregistrement modifié | 2020-04-22 |
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