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Li J, Wang Q, Wang Z, Cao Y, Zhu J, Lou Y, Zhao Y, Shi L, Yuan S. Evaporation and in-situ gelation induced porous hybrid film without template enhancing the performance of lithium ion battery separator. J Colloid Interface Sci 2021; 595:142-150. [PMID: 33819689 DOI: 10.1016/j.jcis.2021.03.099] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 03/15/2021] [Accepted: 03/16/2021] [Indexed: 10/21/2022]
Abstract
The current commercialized polyethylene (PE) separator has poor wettability and thermal stability which will seriously restrict the electrochemical performance and affect the safety of lithium ion battery. Herein, a porous hybrid layer coated separator with high thermal stability, good electrochemical performance and improved wettability was prepared by a template-free method via the synergistic effect between tetraethoxysilane (TEOS) and aramid nano fibers (ANFs) during the evaporation of solvent and the in-situ gelation of TEOS. The results show that the porous hybrid coating layers can enhance the thermal stability, wettability and electrolyte uptake of the separators. Moreover, the lithium ion transference number is also increased. As a result, the battery assembled with the composite separator exhibits enhanced electrochemical performance in terms of cycle stability and rate performance. When coupled with LiCoO2cathode, the capacity retention rate is as high as 96.0% after 100 cycles at 0.2C.
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Affiliation(s)
- Jia Li
- Laboratory for Microstructures, Shanghai University, 99 Shangda Road, Shanghai 200444, China; Research Centre of Nanoscience and Nanotechnology, Shanghai University, 99 Shangda Road, Shanghai 200444, China
| | - Qingtong Wang
- Research Centre of Nanoscience and Nanotechnology, Shanghai University, 99 Shangda Road, Shanghai 200444, China
| | - Zhuyi Wang
- Research Centre of Nanoscience and Nanotechnology, Shanghai University, 99 Shangda Road, Shanghai 200444, China.
| | - Yutong Cao
- Jiangsu Ruisheng Advanced Material Technology Co., Ltd, 10 Central Avenue, Qingshan Town, Yizheng 211417, China
| | - Junqiang Zhu
- Jiangsu Ruisheng Advanced Material Technology Co., Ltd, 10 Central Avenue, Qingshan Town, Yizheng 211417, China
| | - Yanyan Lou
- Laboratory for Microstructures, Shanghai University, 99 Shangda Road, Shanghai 200444, China
| | - Yin Zhao
- Research Centre of Nanoscience and Nanotechnology, Shanghai University, 99 Shangda Road, Shanghai 200444, China
| | - Liyi Shi
- Research Centre of Nanoscience and Nanotechnology, Shanghai University, 99 Shangda Road, Shanghai 200444, China
| | - Shuai Yuan
- Research Centre of Nanoscience and Nanotechnology, Shanghai University, 99 Shangda Road, Shanghai 200444, China; Emerging Industries Institute, Shanghai University, Jiaxing, Zhejiang 314006, China.
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