| Preparation and electrochemical properties of Li1.3Ti1.7Al0.3(PO4)3 solid electrolyte for Li ion batteries by sol-gel process |
| Seoung Soo LEE |
| Changwon National University |
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Rechargeable lithium ion batteries are widely used as portable electrochemical energy conversion and storage devices due to their higher energy density than other commercialized rechargeable batteries [1]. However, lithium ion batteries still suffer from a safety issue caused by combustible organic solvents used in their electrolytes [2]. To solve their safety problem, flame retarding solid electrolytes such as Li1.3Ti1.7Al0.3(PO4)3 (LTAPO) have been considered as the most promising electrolyte [3]. However, the LTAPO has been generally prepared by a solid state reaction with a complex and high temperature process.
The present research reports the synthesis of the LTAPO solid electrolyte by a low temperature method of the sol-gel process and its effects on electrochemical performances. In this study, three types of Li salts were employed as the Li source, which are LiNO3, LiCl, and Li acetate, for investigating the effects of Li salt on the electrochemical properties of solid electrolyte. Ti(OCH2(CH2)2CH3)4, NH4H2PO4, and (AlNO3)3∙9H2O precursors were used for Ti, P, and Al source, respectively. It was shown in our preliminary work that the electrochemical performances of solid electrolyte were affected by the Li source materials. The samples’ morphology/microstructure evolution with processing parameter prepared by different Li salt species and their relationship with electrochemical properties will be discussed in this presentation.
References:
[1] G. Ceder, Y. M. Chiang, C. R. Sadoway, M. K. Aydinol, Y. I. Jang, B. Huang, Nature 392 (1998) 694.
[2] X. Xu, X. Wen, J. Wu, X. Yang, Solid State Ionic 178 (2007) 29-34.
[3] T. Abe, M. Ohtsuka, F. Sagane, Y. Iriyama, Z. Ogumi, J. Electrochem. Soc., 151 (2004) A1950
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