Na/Li離子交換反應(yīng)的影響
( 東北大學(xué) 材料與冶金學(xué)院， 沈陽(yáng) 110004)
摘 要: Li1.3Ti1.7Al0.3(PO4)3是具有Nasicon骨架的鋰離子傳導(dǎo)材料， 其中的Li+很容易被溶液中的Na+置換。 研究了在Li1.3Ti1.7Al0.3(PO4)3結(jié)構(gòu)中摻入Zr來替代Ti， 以提高Na/Li離子交換速度。 結(jié)果表明： 增加Zr元素比例可顯著提高Li1.3Ti1.7-xZrxAl0.3(PO4)3材料中Na/Li離子交換反應(yīng)速度。 Li1.3Ti1.7-xZrxAl0.3(PO4)3材料中的Na/Li離子交換反應(yīng)動(dòng)力學(xué)過程可近似由JMAK方程描述。
關(guān)鍵字: Zr； Li1.3Ti1.7Al0.3(PO4)3；離子交換
Li1.3Ti1.7Al0.3(PO4)3
LIU Ying, XU Jian
（ School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China）
Abstract: The lithium ion conductor Li1.3Ti1.7Al0.3(PO4)3 is Nasicon structural functional material, which has very high ion exchange selectivity to Na+. The effect of Zr on Na/Li ion exchange reaction and behavior for the Li1.3Ti1.7Al0.3(PO4)3 in sodium chloride solution was investigated. The experimental results show that the Na/Li ion exchange mass and exchange fraction significantly raise for Li1.3Ti1.7-xZrxAl0.3(PO4)3 with Zr element increasing in the same infiltration time. The Na/Li ion exchange reaction process was investigated by means of X-ray diffraction. It is shown that the reactants is Na1.3Ti1.7-xZrxAl0.3(PO4)3 during all the reactive process. The ion exchange kinetics of Na/Li for Li1.3Ti1.7-xZrxAl0.3(PO4)3 is analyzed and discussed. The Na/Li ion exchange kinetics process of Li1.3Ti1.7-xZrxAl0.3(PO4)3 in sodium chloride solution can be represented approximately by the equation of JMAK.
Key words: Zr; Li1.3Ti1.7Al0.3(PO4)3; ion exchange
