Li diffusion in nano- and microcrystalline (1-x)Li2O:xB2O3 composites was investigated with impedance and NMR spectroscopy in the temperature range from 140 K to 500 K. Impedance results for the nanocrystalline system differ drastically from those of the microcrystalline system and show an enhancement of the dc conductivity when adding the insulator B2O3 to the ionic conductor Li2O. 7Li NMR lineshape measurements confirm that this is due to an enhanced fraction of mobile ions in the interfacial regions between the conductor and the insulator. Activation energies obtained from the dc conductivity (0.95 eV) and the 7Li NMR relaxation rate T1-1 (0.29 eV) are independent of the composition of the composites. © 2001 Scitec Publications.
Indris, S., Heitjans, P., Roman, H., Bunde, A. (2001). Li diffusion in nano- and microcrystalline (1-x)Li2O:xB2O3. DIFFUSION AND DEFECT DATA, SOLID STATE DATA. PART A, DEFECT AND DIFFUSION FORUM, 194-199(194-199), 935-940 [10.4028/www.scientific.net/ddf.194-199.935].
Li diffusion in nano- and microcrystalline (1-x)Li2O:xB2O3
Roman H. E.;
2001
Abstract
Li diffusion in nano- and microcrystalline (1-x)Li2O:xB2O3 composites was investigated with impedance and NMR spectroscopy in the temperature range from 140 K to 500 K. Impedance results for the nanocrystalline system differ drastically from those of the microcrystalline system and show an enhancement of the dc conductivity when adding the insulator B2O3 to the ionic conductor Li2O. 7Li NMR lineshape measurements confirm that this is due to an enhanced fraction of mobile ions in the interfacial regions between the conductor and the insulator. Activation energies obtained from the dc conductivity (0.95 eV) and the 7Li NMR relaxation rate T1-1 (0.29 eV) are independent of the composition of the composites. © 2001 Scitec Publications.
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