Silicon Substituted Lithium Stannum Phosphate Ceramic Electrolytes: Structural, Electrical and Electrochemical Properties

  • Noriah Ab Wahab Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
  • Nurul Akmaliah Dzulkurnain School of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Malaysia
  • Nur Amalina Mustaffa Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
  • Nor Sabirin Mohamed Centre for Foundation Studies in Science, University of Malaya, 50603 Kuala Lumpur, Malaysia

Abstract

Structural, electrical and electrochemical properties of silicon (Si) substituted NASICON-structured lithium stannum phosphate, Li1+ySn2P3-ySiyO12 with 0 < y < 1 that was prepared by the low-temperature water-based sol-gel method has been investigated. From the structural analysis, all samples in the system displayed rhombohedral  symmetry. The total ionic conductivity, σt, and ionic mobility, µ was increased with the increase of silicon content, y. A high ionic conductivity value of 6.05 × 10-5 S cm-1 exhibited at y = 0.5 with a temperature of 500 °C. Linear sweep voltammetry analysis showed that the sample was electrochemically stable up to 5.1 V. Meanwhile, the ionic transference number value of the sample was 0.99, suggesting that the majority of mobile charge carriers were predominantly due to ions. Thus, from these results, it indicated that silicon substitution in LiSn2P3O12 ceramic electrolytes is significantly enhanced the electrical and electrochemical properties.

Published
2020-08-27
How to Cite
AB WAHAB, Noriah et al. Silicon Substituted Lithium Stannum Phosphate Ceramic Electrolytes: Structural, Electrical and Electrochemical Properties. Scientific Research Journal, [S.l.], v. 17, n. 2, p. 191-207, aug. 2020. ISSN 2289-649X. Available at: <https://myjms.mohe.gov.my/index.php/SRJ/article/view/10136>. Date accessed: 21 may 2024. doi: https://doi.org/10.24191/srj.v17i2.10136.
Section
Emerging materials