Preparation and Properties of PP/PAN/Cotton Fibers Composite Membrane as Lithium-Ion Battery Separator with Thermal Shut-Off Function
The lithium-ion battery separator plays roles of separating the positive and negative electrodes and providing ion channels, and at the same time, it can play a more important role in the safety of the lithium-ion battery. In this work, a modified PP (polypropylene)/PAN (polyacrylonitrile)/cotton fi...
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| Format: | Article |
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MDPI AG
2023-02-01
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| Series: | Batteries |
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| Online Access: | https://www.mdpi.com/2313-0105/9/2/113 |
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| author | Peiyu Liu Xiongfei Zhang Chuang Ma Dan Huang Pengyun Li Yana Shi Chunxiao Qu Xiang Shi |
| author_facet | Peiyu Liu Xiongfei Zhang Chuang Ma Dan Huang Pengyun Li Yana Shi Chunxiao Qu Xiang Shi |
| author_sort | Peiyu Liu |
| collection | DOAJ |
| description | The lithium-ion battery separator plays roles of separating the positive and negative electrodes and providing ion channels, and at the same time, it can play a more important role in the safety of the lithium-ion battery. In this work, a modified PP (polypropylene)/PAN (polyacrylonitrile)/cotton fibers composite membrane with a thermal shut-off function was prepared by a wet-laid process. The results are as follows: When the fibers’ mass fraction was 50%, the composite membrane had the best combination properties, with a tensile strength of 1.644 KN·m<sup>−1</sup>, the porosity was 63%, and it had good wettability with an aspiration height of 39 mm and a liquid absorption rate of 269%. The thermal shrinkage of the composite membrane was less than 4% after thermal treatment under 160 °C. More importantly, the DSC curve showed that the modified PP/PAN/cotton fibers composite membrane had a thermal shut-off function with the temperature between 110 °C and 160 °C. After thermal treatment under 160 °C for 1 h, the ionic conductivity of the fiber membrane decreased to 0.32 mS·cm<sup>−1</sup> from 1.99 mS·cm<sup>−1</sup>. Electrochemical performance tests showed that the button battery using the fiber composite membrane had a slightly better initial discharge, capacity retention and cycle performance at different rates than the button battery equipped with the PP membrane. The results show that the modified PP/PAN/cotton fibers composite membrane improves the safety and electrochemical performance of lithium-ion battery. |
| first_indexed | 2024-03-11T09:09:05Z |
| format | Article |
| id | doaj.art-7868fb05e27b4362b46f7670e3bacb38 |
| institution | Directory Open Access Journal |
| issn | 2313-0105 |
| language | English |
| last_indexed | 2024-03-11T09:09:05Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Batteries |
| spelling | doaj.art-7868fb05e27b4362b46f7670e3bacb382023-11-16T19:07:45ZengMDPI AGBatteries2313-01052023-02-019211310.3390/batteries9020113Preparation and Properties of PP/PAN/Cotton Fibers Composite Membrane as Lithium-Ion Battery Separator with Thermal Shut-Off FunctionPeiyu Liu0Xiongfei Zhang1Chuang Ma2Dan Huang3Pengyun Li4Yana Shi5Chunxiao Qu6Xiang Shi7College of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaCollege of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaCollege of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaCollege of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaCollege of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaCollege of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaCollege of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaCollege of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaThe lithium-ion battery separator plays roles of separating the positive and negative electrodes and providing ion channels, and at the same time, it can play a more important role in the safety of the lithium-ion battery. In this work, a modified PP (polypropylene)/PAN (polyacrylonitrile)/cotton fibers composite membrane with a thermal shut-off function was prepared by a wet-laid process. The results are as follows: When the fibers’ mass fraction was 50%, the composite membrane had the best combination properties, with a tensile strength of 1.644 KN·m<sup>−1</sup>, the porosity was 63%, and it had good wettability with an aspiration height of 39 mm and a liquid absorption rate of 269%. The thermal shrinkage of the composite membrane was less than 4% after thermal treatment under 160 °C. More importantly, the DSC curve showed that the modified PP/PAN/cotton fibers composite membrane had a thermal shut-off function with the temperature between 110 °C and 160 °C. After thermal treatment under 160 °C for 1 h, the ionic conductivity of the fiber membrane decreased to 0.32 mS·cm<sup>−1</sup> from 1.99 mS·cm<sup>−1</sup>. Electrochemical performance tests showed that the button battery using the fiber composite membrane had a slightly better initial discharge, capacity retention and cycle performance at different rates than the button battery equipped with the PP membrane. The results show that the modified PP/PAN/cotton fibers composite membrane improves the safety and electrochemical performance of lithium-ion battery.https://www.mdpi.com/2313-0105/9/2/113PP fiberPAN fiberlithium-ion battery separatorthermal shut-off |
| spellingShingle | Peiyu Liu Xiongfei Zhang Chuang Ma Dan Huang Pengyun Li Yana Shi Chunxiao Qu Xiang Shi Preparation and Properties of PP/PAN/Cotton Fibers Composite Membrane as Lithium-Ion Battery Separator with Thermal Shut-Off Function Batteries PP fiber PAN fiber lithium-ion battery separator thermal shut-off |
| title | Preparation and Properties of PP/PAN/Cotton Fibers Composite Membrane as Lithium-Ion Battery Separator with Thermal Shut-Off Function |
| title_full | Preparation and Properties of PP/PAN/Cotton Fibers Composite Membrane as Lithium-Ion Battery Separator with Thermal Shut-Off Function |
| title_fullStr | Preparation and Properties of PP/PAN/Cotton Fibers Composite Membrane as Lithium-Ion Battery Separator with Thermal Shut-Off Function |
| title_full_unstemmed | Preparation and Properties of PP/PAN/Cotton Fibers Composite Membrane as Lithium-Ion Battery Separator with Thermal Shut-Off Function |
| title_short | Preparation and Properties of PP/PAN/Cotton Fibers Composite Membrane as Lithium-Ion Battery Separator with Thermal Shut-Off Function |
| title_sort | preparation and properties of pp pan cotton fibers composite membrane as lithium ion battery separator with thermal shut off function |
| topic | PP fiber PAN fiber lithium-ion battery separator thermal shut-off |
| url | https://www.mdpi.com/2313-0105/9/2/113 |
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