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| Study on Preparation and Performance of Aramid Nanofiber-reinforced Paper-based Lithium-ion Battery Separators |
| Received:December 27, 2024 Revised:January 07, 2025 |
| DOI：10.11981/j.issn.1000-6842.2025.01.49 |
| Key Words:paper-based separator;aramid nanofibers;high-temperature-resistant |
| Fund Project:广州市重点研发计划项目（202206010187）。 |
| Author Name | Affiliation | Postcode | | LIU Tianyu | School of Light Industry and Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640
China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102 | 100102 | | YANG Yang | China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102 | 100102 | | HUANG Jianbo | China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
Paper Industry Productivity Promotion Center， Quzhou， Zhejiang Province， 324000 | 324000 | | HUO Feiyu | China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102 | 100102 | | LIU Ying* | School of Light Industry and Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 | 510640 | | CHAO Lumen* | School of Light Industry and Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640
China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102 | 100102 | | LIU Wen | China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102 | 100102 |
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| Abstract: |
| In order to improve the electrolyte wettability and thermal dimensional stability of lithium-ion battery separators， high-temperature-resistant bleached sulphate-flour broadleaf wood pulp （LBKP）/aramid nanofibers （ANFs） paper-based lithium-ion battery separators were obtained via papermaking process， which were prepared by using LBKP and ANFs as raw materials. The effects of the mass fraction of ANFs on the pore structure， mechanical properties， thermal dimensional stability， and electrolyte wettability of the LBKP/ANFs paper-based lithium-ion battery separators were mainly investigated by micro-morphological characterization， tensile test， contact angle test and other analytical means. The results showed that when the LBKP beating degree was 80 °SR and the mass fraction of ANFs was 20%， the prepared LBKP/ANFs-20 paper-based lithium-ion battery separator had the best performance， with a porosity of 55.5%， a liquid absorption rate of 145.9%， a tensile strength of 58.9 MPa， and basically no dimensional shrinkage at 180 ℃. The lithium cobaltate/lithium （LiCoO2/Li） battery assembled with LBKP/ANFs-20 paper-based lithium-ion battery separator had a higher initial discharge specific capacity （168.07 mAh/g） at 0.2 C rate， and the capacity retention rate after 50 charge/discharge cycles was 91.7%， higher than that of the lithium-ion battery assembled with the commercial polyolefin diaphragm Celgard 2325 （68.2%）， which exhibited good rate performance and charge/discharge cycle performance. |
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