| 1,2-丙二醇辅助溶胶凝胶法制备NASICON型Li1.3Al0.3Ti1.7(PO4)3固体电解质 |
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| 引用本文： | 张临超,陈鹏,胡章,陈春华.1,2-丙二醇辅助溶胶凝胶法制备NASICON型Li1.3Al0.3Ti1.7(PO4)3固体电解质[J].化学物理学报,2012,25(6):703-707. |
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| 作者姓名： | 张临超 陈鹏 胡章 陈春华 |
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| 作者单位： | 中国科学技术大学材料科学与工程系，合肥230026;中国科学技术大学材料科学与工程系，合肥230026;中国科学技术大学材料科学与工程系，合肥230026;中国科学技术大学材料科学与工程系，合肥230026 |
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| 摘 要： | 通过1,2-丙二醇辅助的溶胶凝胶方法制备了具有NASICON结构的固体锂离子导体Li1.3Al0.3Ti1.7(PO4)3，并且通过热重/差热分析、X射线衍射分析、比表面观测、电化学阻抗谱以及计时电流法等对其各方面性能进行了表征. 通过使用1,2-丙二醇辅助方法，未额外添加络合剂，也未对pH值进行调整得到均匀的溶胶前驱体，并且通过在850～950oC不同高温段烧结得到无杂相的具有NASICON结构
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| 关 键 词： | 磷酸钛铝锂，锂离子导体，NASICON，电解质，阻抗谱 |
| 收稿时间： | 2012/9/20 0:00:00 |
Electrical Properties of NASICON-type Structured Li1.3Al0.3Ti1.7(PO4)3 Solid Electrolyte Prepared by 1,2-Propylene glycol-assisted Sol-gel Method |
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| Lin-chao Zhang,Peng Chen,Zhang Hu and Chun-hua Chen.Electrical Properties of NASICON-type Structured Li1.3Al0.3Ti1.7(PO4)3 Solid Electrolyte Prepared by 1,2-Propylene glycol-assisted Sol-gel Method[J].Chinese Journal of Chemical Physics,2012,25(6):703-707. |
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| Authors: | Lin-chao Zhang Peng Chen Zhang Hu and Chun-hua Chen |
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| Institution: | CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engi-neering, University of Science and Technology of China, Hefei 230026, China;CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engi-neering, University of Science and Technology of China, Hefei 230026, China;CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engi-neering, University of Science and Technology of China, Hefei 230026, China;CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engi-neering, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | Lithium-ion conductor Li1.3Al0.3Ti1.7(PO4)3 with an ultrapure NASICON-type phase is syn-thesized by a 1,2-propylene glycol (1,2-PG)-assisted sol-gel method and characterized by differential thermal analysis-thermo gravimetric analysis, X-ray diffraction, scanning elec-tron microscopy, electrochemical impedance spectroscopy, and chronoamperometry test.Due to the use of 1,2-PG, a homogeneous and light yellow transparent precursor solu-tion is obtained without the precipitation of Ti4+ and Al3+ with PO43-. Well crystallized
Li1.3Al0.3Ti1.7(PO4)3 can be prepared at much lower temperatures from 850 oC to 950 oC within a shorter synthesis time compared with that prepared at a temperature above 1000 oC by a conventional solid-state reaction method. The lithium ionic conductivity of the sintered pellets is up to 0.3 mS/cm at 50 oC with an activation energy as low as 36.6 kJ/mol for the specimen pre-sintered at 700 oC and sintered at 850 oC. The high conductivity, good chemi-cal stability and easy fabrication of the Li1.3Al0.3Ti1.7(PO4)3 provide a promising candidate as solid electrolyte for all-solid-state Li-ion rechargeable batteries. |
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| Keywords: | Lithium aluminum titanium phosphate Lithium-ion conductor NASICON electrolyte Impedance spectroscopy |
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