Journal
SOLID STATE IONICS
Volume 263, Issue -, Pages 27-32Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2014.04.017
Keywords
Lithium-air cell; Solid electrolyte; Lithium ion conductor; NASICON-type
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Funding
- Japan Science and Technology Agency (JST)
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High lithium ion conductivity solid electrolytes of Li1.4FexAl0.4 (-) Ti-x(1.6)(PO4)(3) (x = 0-0.4) with the NASICON-type structure were synthesized by using a sol-gel precursor. The highest electrical conductivity was obtained for Li1.4Fe0.25Al0.15Ti1.6(PO4)(3) sintered at 1040 degrees C for 7 h in air. The total, grain boundary, and bulk conductivities of the pellet were 1.01 x 10(-3), 2.17 x 10(-3) and 1.81 x 10(-3) S cm(-1) at 25 degrees C, respectively. The contribution of electron (or hole) conductivity to the total conductivity was negligibly small. Li1.4Fe0.25Al0.15Ti1.6(PO4)(3) was unstable in water, but stable in saturated LiOH and LiCl aqueous solutions. (C) 2014 Elsevier B.V. All rights reserved.
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