The effects of lithium doping level on the structural, electrical properties of Li+-doped BPO4 solid electrolyte
| Autor: | Miao Shui, Cheng Liangliang, Yang Tianci, Gao Shan, Weidong Zheng, Yuanlong Ren, Feng Lin, Jie Shu |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Rietveld refinement Mechanical Engineering Inorganic chemistry Analytical chemistry chemistry.chemical_element Ionic bonding Electrolyte Condensed Matter Physics Crystal Tetragonal crystal system chemistry Mechanics of Materials Fast ion conductor Ionic conductivity General Materials Science Lithium |
| Zdroj: | Materials Research Bulletin. 48:2896-2900 |
| ISSN: | 0025-5408 |
| Popis: | A series of lithium ion conducting solid electrolytes Li x B 1− x /3 PO 4 ( x = 0.01, 0.05, 0.09, 0.13, 0.17, 0.20) is synthesized by a soft-chemistry route. FTIR and XRD measurements reveal that the electrolyte is pure phase of tetragonal structure. AC-impedance spectroscopy (AC-IS) at room temperature shows that Li x B 1− x /3 PO 4 exhibits higher ionic conductivities in the range 0.05 ≤ x ≤ 0.13, beyond which, the ionic conductivities decrease quickly. Maximum ionic conductivity of the Li x B 1− x /3 PO 4 reaches 3.35 × 10 −5 S cm −1 at room temperature for x = 0.05. Direct current polarizing (DCP) measurement indicates that the decomposition voltage for the solid electrolyte reaches up to 3.7 V. Micro-structure parameters of synthesized Li x B 1− x /3 PO 4 samples are calculated by Rietveld refinement of X-ray diffraction spectra. The unit-cell parameters, lattice strain, crystal grain size and ionic conductivities of the samples are correlated with the lithium ion doping level x . |
| Databáze: | OpenAIRE |
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