Journal
IONICS
Volume 19, Issue 5, Pages 731-737Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-012-0805-x
Keywords
Nasicon-type solid electrolyte; Li+ diffusion coefficient; Complex impedance; Ionic conductivity
Funding
- 973 fundamental research program from the Ministry of Science and Technology of China [2010CB635116]
- NSFC [21173190]
- Educational Commission of Zhejiang Province [Y201017390]
- Ningbo Science and Technology Bureau Project [2011A610086]
- K.C. Wong Magna Fund in Ningbo University
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Nasicon-type solid electrolyte Li1.3Al0.1Zn0.1Ti1.8P3O12 was prepared by citric acid-assisted acrylamide polymerisation gel method. X-ray diffraction pattern showed that the introduction of Zn2+ in the parent matrix Li1+ xAlxTi2-xP3O12 made it easier to get high-purity rhombohedral structure (space group R (3) over barC) Li1.3Al0.1Zn0.1Ti1.8P3O12 without the evidence of impurity secondary phase. The Li+ kinetics were investigated by complex impedance in bulk pellet and ionic conductivity in battery-type composite cathode, respectively. Grain-interior resistance measured by galvanostatic intermittent titration technique, potential step chronoamperometry, and AC impedance spectroscopy at 20 degrees C varies in the range 1.2-1.95 x 10(-4) Scm(-1), which is in good agreement with that obtained by complex impedance method 1.5 x 10(-4) Scm(-1).
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