| 高氯酸锂-乙酰胺新型二元熔盐电解质的谱学研究 |
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| 引用本文： | 陈人杰,吴锋.高氯酸锂-乙酰胺新型二元熔盐电解质的谱学研究[J].物理化学学报,2005,21(2):177-181. |
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| 作者姓名： | 陈人杰 吴锋 |
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| 作者单位： | School of Chemical Engineering ＆ the Environment, Beijing Institute of Technology, National Development Center of High Technology Green Materials, Beijing 100081 |
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| 基金项目： | 国家重点基础研究发展计划(2002CB211800)，国家基础研究重大项目前期研究专项(2001CCA05000)资助~~ |
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| 摘 要： | 高氯酸锂与乙酰胺在适宜摩尔配比范围内可形成热稳定性良好、电化学性能优良的室温熔盐.从分析LiClO4与乙酰胺形成熔盐的作用机制出发,通过红外、拉曼光谱的谱学分析并应用非局部密度泛函理论方法进行量化计算对二者的相互作用进行了讨论.发现乙酰胺通过Li－O键与LiClO4中的Li＋配位而破坏了LiClO4的离子键,形成很大的配位阳离子,削弱了阴阳离子间的库伦作用力;同时Li－O也导致乙酰胺分子间的氢键断裂,因而体系的共熔温度较之纯物质熔点显著降低,部分样品室温下以液体状态稳定存在.
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| 关 键 词： | 熔盐电解质 高氯酸锂 乙酰胺 非局部密度泛函理论 红外光谱 拉曼光谱 |
| 收稿时间： | 2004-07-19 |
| 修稿时间： | 2004年7月19日 |
Spectroscopic Investigation of New Binary Molten Salt Electrolytes Based on LiClO4 with Acetamide |
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| CHEN,Ren-Jie WU,Feng.Spectroscopic Investigation of New Binary Molten Salt Electrolytes Based on LiClO4 with Acetamide[J].Acta Physico-Chimica Sinica,2005,21(2):177-181. |
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| Authors: | CHEN Ren-Jie WU Feng |
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| Institution: | School of Chemical Engineering ＆ the Environment, Beijing Institute of Technology, National Development Center of High Technology Green Materials, Beijing 100081 |
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| Abstract: | New low-temperature molten salt electrolytes based on LiClO4 and ace tamide with proper molar ratio appear as liquid at room temperature through they are composed of two solids and have excellent thermal stability and electrochem ical properties.The mechanism of action has been studied by FT-IR spectroscopy, FT-Raman spectroscopy and quantum chemistry calculation with nonlocal DFT.The r esults indicated that acetamide can coordinate with Li cation in the LiClO4-ac etamide system through Li-O bonding.A big coordinate cation was formed and the coulombic force was weakened.Meanwhile,Li-O can also lead to the breakage of hy drogen bonding between acetamide molecules,resulting in the decrease of the co-molten temperature of the system compared with that of pure salt.A part of sampl es of this molten salt could exist stably in liquid state at room temperature. |
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| Keywords: | Molten salt electrolytes Lithium perchlorate Acetamide Nonlocal D FT FT-IR spectroscopy FT-Raman spectroscopy |
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