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现代化工  2022, Vol. 42 Issue (2): 220-224    DOI: 10.16606/j.cnki.issn0253-4320.2022.02.044
  科研与开发 本期目录 | 过刊浏览 | 高级检索 |
寡层Ti3C2Tx改性锂硫电池隔膜的研究
韩胜华, 王鸣玉, 李松阳, 胥琦, 谢敏, 晁自胜
长沙理工大学材料科学与工程学院, 湖南 长沙 410114
Few-layer Ti3C2Tx modified separator for lithium-sulfur battery
HAN Sheng-hua, WANG Ming-yu, LI Song-yang, XU Qi, XIE Min, CHAO Zi-sheng
School of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, China
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摘要 利用氟化锂和盐酸对前驱体Ti3AlC2进行刻蚀,成功得到寡层Ti3C2Tx纳米片,通过真空抽滤将其负载至商用锂硫电池PE隔膜上,得到修饰层厚度约为710 nm的层状选择性透过Ti3C2Tx材料修饰PE隔膜。通过层间距筛分多硫化物和锂离子,该复合隔膜能够有效阻挡多硫化物的穿过,但不影响锂离子的传输。实验结果表明,选择性透过隔膜的锂硫电池具有优异的循环性能,在1 C倍率下,其初始比容量为750.3 mA·h/g,循环200圈后比容量仍然有481.3 mA·h/g,容量保持率高达64.15%。
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晁自胜
关键词:  锂硫电池  刻蚀  寡层Ti3C2Tx  选择透过性隔膜    
Abstract: Few-layer Ti3C2Tx nanosheets are successfully obtained by etching Ti3AlC2 with lithium fluoride and hydrochloric acid, and loaded on commercial PE separator through vacuum filtration to obtain a Ti3C2Tx modified lamellar permselective PE separator with a modification layer thickness of around 710 nm.Through sieving polysulfides and Li+ ion by layer spacing, the obtained separator can effectively suppress the diffusion of polysulfides to pass through the separator but show low hinderance to Li+ ion.It is shown through experiments that the Li-S battery with permselective Ti3C2Tx layer modified separator displays an improved cycle performance, which shows an initial specific capacity of 750.3 mAh·g-1 at 1 C rate and still maintains at 481.3 mAh·g-1 after 200 cycles, corresponding to a high capacity retention rate of 64.15%.
Key words:  lithium-sulfur battery    etching    few layer Ti3C2Tx    permselective separator
收稿日期:  2021-03-09      修回日期:  2021-12-01          
ZTFLH:  TM912  
通讯作者:  晁自胜(1965-),男,博士,教授,博士生导师,研究方向为催化绿色化学,通讯联系人,zschao@yahoo.com。    E-mail:  zschao@yahoo.com
作者简介:  韩胜华(1997-),男,硕士研究生,研究方向为新型二维材料在锂硫电池中的应用,776816427@qq.com
引用本文:    
韩胜华, 王鸣玉, 李松阳, 胥琦, 谢敏, 晁自胜. 寡层Ti3C2Tx改性锂硫电池隔膜的研究[J]. 现代化工, 2022, 42(2): 220-224.
HAN Sheng-hua, WANG Ming-yu, LI Song-yang, XU Qi, XIE Min, CHAO Zi-sheng. Few-layer Ti3C2Tx modified separator for lithium-sulfur battery. Modern Chemical Industry, 2022, 42(2): 220-224.
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https://www.xdhg.com.cn/CN/10.16606/j.cnki.issn0253-4320.2022.02.044  或          https://www.xdhg.com.cn/CN/Y2022/V42/I2/220
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