conductivity;
hexagonal parameters;
Li-7 and P-31 MAS NMR;
Li/Na mixed ion effect;
D O I:
10.1016/S0167-2738(02)00453-8
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
The mixed ion effect (MIE) in Li/Na-NaZr2(PO4)(3) with a three-dimensional diffusion path was observed. The conductivity minimum at an ionic ratio 0.8 was lower by about three orders of magnitude than for either end member. Hexagonal parameters a, c and Li-7 MAS/NMR spectral intensity against the ionic ratio showed a linear change. The spectral width of P-31 MAS NMR at chemical shift 5.9 ppm against the ionic ratio showed a minimum at the same ionic ratio with the conductivity data. The behavior suggests that the conductivity minimum results from the inhomogeneous distribution of two unlike ions and a blocking of diffusion path. (C) 2002 Elsevier Science B.V. All rights reserved.