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.
Effect of Zr on Na/Li ion exchange behavior of Li1.3Ti1.7Al0.3(PO4)3
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.
Fig.1 Variation of exchange reaction of Na/Li in NaCl solution with infiltration time for Li1.3Ti1.7-xZrxAl0.3(PO4)3 (a)—Exchange mass; (b)—Exchange fraction
Fig.2 XRD patterns for Li1.3Ti1.7-xZrxAl0.3(PO4)3 after different infiltration time in NaCl solution (a)—x=0; (b)—x=0.6; (c)—x=1.2; (d)—x=1.7
图3 Li1.3Ti1.7-xZrxAl0.3(PO4)3材料中Na/Li交换反应随时间的变化
Fig.3 Variation of exchange reaction of Na/Li in NaCl solution with infiltration time for Li1.3Ti1.7-xZrxAl0.3(PO4)3 (a)—Exchange mass; (b)—Exchange fraction