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Oxygen plasma modified separator for lithium sulfur battery

机译：用于锂硫电池的氧等离子体改性分离器

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摘要

To reduce the shuttle effect of lithium sulfur (Li-S) batteries and improve the cycling stability, the surface of the commercial separator in an Li-S battery was modified by the O-2 plasma treatment, which generated lots of electronegative oxygenic functional groups such as -COOH and -OH on the surface of the separator. In order to confirm the existence and the effect of the electronegative oxygenic functional groups on the modified separator, the contact angle measurement and Fourier Transform Infrared Spectrometry (FTIR) were investigated. The charge/discharge and electrochemical impedance spectroscopy (EIS) tests of the Li-S battery assembled with the normal and the O-2 plasma treated separator were analyzed. The surface characterization demonstrated that the oxygenic functional groups on the surface of the separator by the plasma modification played a critical role in improving the wettability and increasing electrical insulating properties. The cycling performance of Li-S batteries with the plasma treated separator had an obvious improvement owing to the electrostatic repulsion between electronegative oxygenic functional groups on the surface of O-2 plasma treated separator and electronegative polysulfide. The battery assembled with O-2 plasma treated separator had a higher capacity retention (48.53%) than that of the normal separator (24.51%).
机译：为了减少锂硫（LI-S）电池的梭效果并改善循环稳定性，通过O-2等离子体处理改变了LI-S电池中的商业分离器的表面，这产生了大量的电负载含氧官能团如 - 隔膜表面上的-COOH和-OH。为了确认在改性分离器上的电信致含氧官能团的存在和效果，研究了接触角测量和傅里叶变换红外光谱法（FTIR）。分析了用正常和O-2等离子体处理分离器组装的LI-S电池的充电/放电和电化学阻抗光谱（EIS）。表面表征证明，通过等离子体改性的分离器表面上的含氧官能团在改善润湿性和增加的电绝缘性能方面起着关键作用。由于电气含氧官能团在O-2等离子体处理的隔膜表面和电致剂多硫化物的表面上的静电排斥，Li-S电池与等离子体处理隔膜的循环性能具有显而易见的改善。与O-2等离子体处理的隔膜组装的电池比正常分离器（24.51％）的容量保持（48.53％）更高。

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  • 来源
    《RSC Advances》 |2015年第97期|共6页
  • 作者

    Li Zhen; Jiang Qianqian; Ma Zhaoling; Liu Qiuhong; Wu Zhenjun; Wang Shuangyin;

  • 作者单位

    Hunan Univ Coll Chem &

    Chem Engn State Key Lab Chem Biosensing &

    Chemometr Changsha 410082 Hunan Peoples R China;

    Shenzhen Univ Minist Educ SZU NUS Collaborat Innovat Ctr Optoelect Sci &

    Te Key Lab Optoelect Devices &

    Syst Shenzhen 518060 Peoples R China;

    Hunan Univ Coll Chem &

    Chem Engn State Key Lab Chem Biosensing &

    Chemometr Changsha 410082 Hunan Peoples R China;

    Hunan Univ Coll Chem &

    Chem Engn State Key Lab Chem Biosensing &

    Chemometr Changsha 410082 Hunan Peoples R China;

    Hunan Univ Coll Chem Chem Engn Changsha 410082 Hunan Peoples R China;

    Hunan Univ Coll Chem &

    Chem Engn State Key Lab Chem Biosensing &

    Chemometr Changsha 410082 Hunan Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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