LiTi2(PO4)3的Na/Li离子交换特征

锂离子传导材料LiTi₂(PO₄)₃能在LiCl水溶液中高选择性地与Na⁺进行离子交换. 研究了NaCl 溶液中LiTi₂(PO₄)₃上的Na/Li离子交换反应, 实验结果表明, 升高温度能显著提高LiTi₂(PO₄)₃上的Na/Li交换反应速率, 其离子交换动力学规律可近似由JMAK(Johnson-Mehl-Aurami-Kalmogorav)方程描述. 对LiTi₂(PO₄)₃在水和NaCl溶液中的溶解行为的研究结果表明, 升高温度能加快其在水中的溶解速率, pH值过大或过小及离子交换都会加剧LiTi₂(PO₄)₃的溶解.

Ion Exchange Behavior of Na/Li for the Lithium Ion Conductor of LiTi2(PO4)3

The lithium ion conductor LiTi2(PO4)3 has a very high ion exchange selectivity to Na in lithium chloride solution. The ion exchange behavior of Na/Li for LiTi2(PO4)3 in NaCl solution was investigated. The experimental results showed that the Na/Li ion exchange reaction rate increased obviously for LiTi2(PO4)3 with increasing temperature,and the Na/Li ion exchange kinetics process of LiTi2(PO4)3 in sodium chloride solution could be represented approximately by the equation of JMAK(Johnson-Mehl-Aurami-Kalmogorav). The dissolution behaviors of LiTi2(PO4)3 in water and NaCl solution were investigated,the results showed that higher temperature,acid or alkali environment could enhance the dissolution of LiTi2(PO4)3.