“Three‐in‐one” strategy: Heat regulation and conversion enhancement of a multifunctional separator for safer lithium–sulfur batteries
Abstract The safety problems encountered with lithium–sulfur batteries (LSBs) hinder their development for practical applications. Herein, a highly thermally conductive separator was constructed by cross‐weaving super‐aligned carbon nanotubes (SA‐C) on super‐aligned boron nitride@carbon nanotubes (S...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-11-01
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| Series: | Carbon Energy |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/cey2.352 |
| _version_ | 1797447473632903168 |
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| author | Kaiping Zhu Luhe Li Pan Xue Jun Pu Liyun Wu Gengde Guo Ran Wang Ye Zhang Huisheng Peng Guo Hong Qiang Zhang Yagang Yao |
| author_facet | Kaiping Zhu Luhe Li Pan Xue Jun Pu Liyun Wu Gengde Guo Ran Wang Ye Zhang Huisheng Peng Guo Hong Qiang Zhang Yagang Yao |
| author_sort | Kaiping Zhu |
| collection | DOAJ |
| description | Abstract The safety problems encountered with lithium–sulfur batteries (LSBs) hinder their development for practical applications. Herein, a highly thermally conductive separator was constructed by cross‐weaving super‐aligned carbon nanotubes (SA‐C) on super‐aligned boron nitride@carbon nanotubes (SA‐BC) to create a composite film (SA‐BC/SA‐C). This separator was used to fabricate safe LSBs with improved electrochemical performance. The highly aligned separator structure created a uniform thermal field that could rapidly dissipate heat accumulated during continuous operation due to internal resistance, which prevented the development of extremely high temperatures. The array of boron nitride nanosheets endowed the composite separator with a large number of adsorption sites, while the highly graphitized carbon nanotube skeleton accelerated the catalytic conversion of high‐valence polysulfides into low‐valence polysulfides. The arrayed molecular brush design enabled the regulation of local current density and ion flux, and considerably alleviated the growth of lithium dendrites, thus promoting the smooth deposition of Li metal. Consequently, a battery constructed with the SA‐BC/SA‐C separator showed a good discharge capacity of 685.2 mAh g−1 over 300 cycles (a capacity decay of 0.026% per cycle) at 2 C and 60°C. This “three‐in‐one” multifunctional separator design strategy constitutes a new path forward for overcoming the safety problems of LSBs. |
| first_indexed | 2024-03-09T13:56:31Z |
| format | Article |
| id | doaj.art-cee4a7c2cce84dbba57d51889ac27da8 |
| institution | Directory Open Access Journal |
| issn | 2637-9368 |
| language | English |
| last_indexed | 2024-03-09T13:56:31Z |
| publishDate | 2023-11-01 |
| publisher | Wiley |
| record_format | Article |
| series | Carbon Energy |
| spelling | doaj.art-cee4a7c2cce84dbba57d51889ac27da82023-11-30T13:46:05ZengWileyCarbon Energy2637-93682023-11-01511n/an/a10.1002/cey2.352“Three‐in‐one” strategy: Heat regulation and conversion enhancement of a multifunctional separator for safer lithium–sulfur batteriesKaiping Zhu0Luhe Li1Pan Xue2Jun Pu3Liyun Wu4Gengde Guo5Ran Wang6Ye Zhang7Huisheng Peng8Guo Hong9Qiang Zhang10Yagang Yao11National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing ChinaNational Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing ChinaNational Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing ChinaKey Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science Anhui Normal University Wuhu ChinaNational Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing ChinaNational Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing ChinaNational Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing ChinaNational Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing ChinaState Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Laboratory of Advanced Materials Fudan University Shanghai ChinaDepartment of Materials Science and Engineering, College of Engineering City University of Hong Kong Hong Kong ChinaBeijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering Tsinghua University Beijing ChinaNational Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing ChinaAbstract The safety problems encountered with lithium–sulfur batteries (LSBs) hinder their development for practical applications. Herein, a highly thermally conductive separator was constructed by cross‐weaving super‐aligned carbon nanotubes (SA‐C) on super‐aligned boron nitride@carbon nanotubes (SA‐BC) to create a composite film (SA‐BC/SA‐C). This separator was used to fabricate safe LSBs with improved electrochemical performance. The highly aligned separator structure created a uniform thermal field that could rapidly dissipate heat accumulated during continuous operation due to internal resistance, which prevented the development of extremely high temperatures. The array of boron nitride nanosheets endowed the composite separator with a large number of adsorption sites, while the highly graphitized carbon nanotube skeleton accelerated the catalytic conversion of high‐valence polysulfides into low‐valence polysulfides. The arrayed molecular brush design enabled the regulation of local current density and ion flux, and considerably alleviated the growth of lithium dendrites, thus promoting the smooth deposition of Li metal. Consequently, a battery constructed with the SA‐BC/SA‐C separator showed a good discharge capacity of 685.2 mAh g−1 over 300 cycles (a capacity decay of 0.026% per cycle) at 2 C and 60°C. This “three‐in‐one” multifunctional separator design strategy constitutes a new path forward for overcoming the safety problems of LSBs.https://doi.org/10.1002/cey2.352conversion enhancementheat regulationhigh safetylithium–sulfur batteriesmultifunctional separator |
| spellingShingle | Kaiping Zhu Luhe Li Pan Xue Jun Pu Liyun Wu Gengde Guo Ran Wang Ye Zhang Huisheng Peng Guo Hong Qiang Zhang Yagang Yao “Three‐in‐one” strategy: Heat regulation and conversion enhancement of a multifunctional separator for safer lithium–sulfur batteries Carbon Energy conversion enhancement heat regulation high safety lithium–sulfur batteries multifunctional separator |
| title | “Three‐in‐one” strategy: Heat regulation and conversion enhancement of a multifunctional separator for safer lithium–sulfur batteries |
| title_full | “Three‐in‐one” strategy: Heat regulation and conversion enhancement of a multifunctional separator for safer lithium–sulfur batteries |
| title_fullStr | “Three‐in‐one” strategy: Heat regulation and conversion enhancement of a multifunctional separator for safer lithium–sulfur batteries |
| title_full_unstemmed | “Three‐in‐one” strategy: Heat regulation and conversion enhancement of a multifunctional separator for safer lithium–sulfur batteries |
| title_short | “Three‐in‐one” strategy: Heat regulation and conversion enhancement of a multifunctional separator for safer lithium–sulfur batteries |
| title_sort | three in one strategy heat regulation and conversion enhancement of a multifunctional separator for safer lithium sulfur batteries |
| topic | conversion enhancement heat regulation high safety lithium–sulfur batteries multifunctional separator |
| url | https://doi.org/10.1002/cey2.352 |
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