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Citation: CHEN Ren-Jie, WU Feng, LI Li, QIU Xin-Ping, CHEN Shi. Binary Molten Salt Electrolytes Based on LiClO₄ and 2-oxazolidinone[J]. Acta Physico-Chimica Sinica, ;2007, 23(04): 554-558. doi: 10.3866/PKU.WHXB20070420 shu

Binary Molten Salt Electrolytes Based on LiClO₄ and 2-oxazolidinone

1.
Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China; School of Chemical Engineering and the Environment, Beijing Institute of Technology, Beijing 100081, P. R. China; National Development Center of High Technology Green Materials, Beijing 100081, P. R. China

Received Date: 7 December 2006
Available Online: 9 March 2007

Novel binary molten salt electrolytes based on LiClO4 and 2-oxazolidinone (OZO) were prepared. The electrolytes appeared as liquid at room temperature though they were composed of two solids. DSC analysis showed that the LiClO4-OZO electrolyte was liquid with a eutectic temperature about -50 ℃. FTIR spectroscopy indicated that OZO could coordinate with Li+ cation in the LiClO4-OZO system through Li—O bonding. A big coordinate cation was formed and the coulombic force was weakened. Meanwhile, Li—O coordination could also lead to the breakage of hydrogen bonding between OZO molecules, resulting in the decrease of the eutectic temperature of the system compared with pure salt. Some the molten salt samples existed as liquid state at roomtemperature. The electrochemical properties were evaluated by ac impedance spectroscopy and cyclic voltammertry, respectively. The conductivity of LiClO4-OZO electrolyte at molar ratio of 1:4.5 was 0.66×10^-3 S·cm-1 at 25 ℃and 7.33×10^-3 S·cm-1 at 80 ℃, and the electrochemical windowwas about 3.5 V.
- Molten salt electrolyte; Thermal property; FTIR spectroscopy; Ionic conductivity; 2-Oxazolidinone; Lithiumperchlorate
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沈阳化工大学材料科学与工程学院沈阳 110142

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Binary Molten Salt Electrolytes Based on LiClO4 and 2-oxazolidinone

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通讯作者: 陈斌, bchen63@163.com

Binary Molten Salt Electrolytes Based on LiClO₄ and 2-oxazolidinone