Study on Modification of BMImBF4 Ionic Liquid as the Electrolyte of Magnesium Deposition-Dissolution with Ethylene Carbonate Additive

Acta Chimica Sinica ›› 2008, Vol. 66 ›› Issue (2): 175-180. Previous Articles Next Articles

Original Articles

碳酸乙烯酯添加剂对BMImBF₄离子液体作为镁沉积—溶解电解液的改性研究

努丽燕娜，杜国栋，冯真真，沈佳妮，杨军

(上海交通大学化学化工学院上海 200240)

投稿日期:2007-06-22 修回日期:2007-08-27 发布日期:2008-01-28
通讯作者: 努丽燕娜

Study on Modification of BMImBF₄ Ionic Liquid as the Electrolyte of Magnesium Deposition-Dissolution with Ethylene Carbonate Additive

NULI Yan-Na* DU Guo-Dong FENG Zhen-Zhen SHEN Jia-Ni YANG Jun

(School of Chemistry and Chemical Technology, Shanghai Jiaotong University, Shanghai 200240)

Received:2007-06-22 Revised:2007-08-27 Published:2008-01-28
Contact: NULI Yan-Na

Abstract

The effect of ethylene carbonate (EC) additive to BMImBF₄ ionic liquid as the electrolyte of magnesium deposition-dissolution was studied by constant current deposition-dissolution, AC impedance, X-ray diffraction and scanning electron microscope (SEM) measurements. After adding w＝5% EC in the ionic liquid of BMImBF₄ with 0.3 mol•L^－1 Mg(CF₃SO₃)₂, deposition-dissolution results exhibited that the process became more stable and the cyclic number was effectively improved, and impedance measurements showed that the surface film resistance and charge-transfer resistance became lower, and SEM results presented that the dendritic deposits evolved to particulate morphology and a thinner surface film was formed. The EC derived surface film, which may consist of polymeric species, suppressed the formation of dendritic magnesium.

Key words: ionic liquid, BMImBF₄, ethylene carbonate, deposition and dissolution, magnesium battery

Cite this article

NULI Yan-Na* DU Guo-Dong FENG Zhen-Zhen SHEN Jia-Ni YANG Jun. Study on Modification of BMImBF₄ Ionic Liquid as the Electrolyte of Magnesium Deposition-Dissolution with Ethylene Carbonate Additive[J]. Acta Chimica Sinica, 2008, 66(2): 175-180.

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碳酸乙烯酯添加剂对BMImBF₄离子液体作为镁沉积—溶解电解液的改性研究

Study on Modification of BMImBF₄ Ionic Liquid as the Electrolyte of Magnesium Deposition-Dissolution with Ethylene Carbonate Additive

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碳酸乙烯酯添加剂对BMImBF4离子液体作为镁沉积—溶解电解液的改性研究