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Structure and lithium ionic conduction in W-doped Li0.39La0.54TiO3 perovskite solid electrolyte

YAZHOU KONG1,2, YING LI1,*

Affiliation

  1. School of Metallurgy, Northeastern University, Shenyang 110819, China
  2. National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian 223003, China

Abstract

In this work, effect of W doping on crystalline structure, microstructure and conductivity for Li0.39La0.54TiO3 perovskite-type solid electrolyte were investigated. Influence of protection method during sintering on crystalline structure for W-doped Li0.39La0.54TiO3 was also studied. X-ray diffraction, scanning electron microscope and AC-impedance spectra technology were used to characterize solid electrolyte samples. (Li0.39La0.54)(1-x)Ti(1-x)WxO3 (x=0, 0.01, 0.03, 0.06) present perovskite structure. With the increase of W dopant content, conductivity of solid electrolyte first increases then decreases. Among all compounds, Li0.36La0.51Ti0.97W0.03O3 has the highest total conductivity of 5.94×10-5 S cm-1 at room temperature with activation energy of 0.314 eV.

Keywords

Li ion battery, Solid electrolyte, Solid state reaction, Dope, LLTO.

Citation

YAZHOU KONG, YING LI, Structure and lithium ionic conduction in W-doped Li0.39La0.54TiO3 perovskite solid electrolyte, Optoelectronics and Advanced Materials - Rapid Communications, 15, 5-6, May-June 2021, pp.294-297 (2021).

Submitted at: Dec. 3, 2018

Accepted at: June 11, 2021