| DOI | Resolve DOI: https://doi.org/10.1021/acsami.5b05718 |
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| Author | Search for: Li, B.; Search for: Li, Y.; Search for: Dai, D.; Search for: Chang, K.; Search for: Tang, H.; Search for: Chang, Z.; Search for: Wang, C.; Search for: Yuan, X.-Z.1; Search for: Wang, H.1 |
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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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| Subject | polyolefin membranes; nonradiation; separator; high lithium-ion conductivity; lithium-ion battery |
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| Abstract | 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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| Publication date | 2015 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21277043 |
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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 | ef41fbb6-cc6b-4645-8fdc-eec93b108bf7 |
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| Record created | 2015-11-10 |
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| Record modified | 2020-04-22 |
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