Elaboration and characterization of a free standing LiSICON membrane for aqueous lithium-air battery

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• 作者：Laurent Puech ; Christophe Cantau ; Philippe Vinatier ; Gwena?lle Toussaint ; Philippe Stevens
• 关键词：Metal&ndash ; air battery ; Lithium anode ; Li2O&ndash ; Al2O3&ndash ; TiO2&ndash ; P2O5 system ; LiPON ; Solid electrolyte
• 刊名：Journal of Power Sources
• 出版年：2012
• 出版时间：15 September, 2012
• 年：2012
• 卷：214
• 期：Complete
• 页码：330-336
• 全文大小：914 K

文摘

In order to develop a LISICON separator for an aqueous lithium-air battery, a thin membrane was prepared by a tape-casting of a Li_1.3Al_0.3Ti_1.7 (PO₄)₃-AlPO₄ based slip followed by a sintering step. By optimizing the grain sizes, the slip composition and the sintering treatment, the mechanical properties were improved and the membrane was reduced to a thickness of down to 40?¦Ìm. As a result, the ionic resistance is relatively low, around 38?¦¸ for a 55?¦Ìm membrane of 1?cm². One side of the membrane was coated with a lithium oxynitrured phosphorous (LiPON) thin film to prevent lithium metal attack. Lithium metal was electrochemically deposited on the LiPON surface from a saturated aqueous solution of LiOH. However, the ionic resistance of the LiPON film, around 67?¦¸ for a 1.2?¦Ìm film of 1?cm², still causes an important ohmic loss contribution which limits the power performance of a lithium-air battery.