Acta Chimica Sinica ›› 2010, Vol. 68 ›› Issue (10): 948-954. Previous Articles     Next Articles

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努丽燕娜, 杨军, 高鹏飞, 李云, 王久林   

  1. (上海交通大学化学化工学院 上海 200240)
  • 收稿日期:2009-08-24 修回日期:2009-12-30 出版日期:2010-05-28 发布日期:2010-01-25
  • 通讯作者: 努丽燕娜

Effect of Separators on BMImBF4 Ionic Liquid as the Electrolyte of Magnesium Deposition-Dissolution

NU Li-Yan-Na, YANG Jun, GAO Feng-Fei, LI Yun, WANG Jiu-Lin   

  1. (School of Chemistry and Chemical Technology, Shanghai Jiaotong University, Shanghai 200240)
  • Received:2009-08-24 Revised:2009-12-30 Online:2010-05-28 Published:2010-01-25
  • Contact: NuLi Yanna

The effect of Celgard 2400, Celgard 2500, ENTEK ET20-60, TEKLON UH2054 and glass fiber separator on BMImBF4 ionic liquid containing 0.5 mol•L-1 Mg(CF3SO3)2 as the electrolyte of magnesium deposition-dissolution was studied. Scanning electron microscopy, absorption performance, AC impedance and constant current charge-discharge measurements were conducted to analyze the surface structure of separators, absorption and maintenance of electrolyte, ionic conductivity and magnesium deposition- dissolution process in coin cells, respectively. The results indicated that the glass fiber separator was more suitable for magnesium deposition-dissolution in Mg(CF3SO3)2/BMImBF4 electrolyte, especially at high current densities due to better absorption and maintenance performances, and higher ionic conductivity.

Key words: ionic liquids, BMImBF4, separators, electrochemical deposition and dissolution, magnesium batteries

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