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Glass-Ceramic Na3+x[(Zr/Cr)x(Sc/Ti)2-x(PO4)3 Electrolyte Materials for Na-Ion Full-Cell Application
Author(s)
Date Issued
January 1, 2023
Type
Article
Abstract
Na3+x[(Zr/Cr)x(Sc/Ti)2-x(PO4)3] glass-ceramic material compositions containing NASICON-type crystalline phases might be a good candidate as an efficient electrolyte exclusively for Na-ion batteries. All-solid-state Na-ion full cells are designed with the three-layered pellets (NaCo0.7(VO)0.3PO4/Na3.5Zr0.5Sc1.5(PO4)3 (NZSP) and Na3.5Cr0.5Ti1.5(PO4)3) (NCTP)/Na-metal foil). The electrical conductivity of the NZSPglass-ceramic powder sample achieves to be highest (9.47 × 10−04 S/cm) due to its lower grain boundary resistance (R gb) as observed in SEM images and also exhibits best electrochemical stability against conductivity when the samples kept in ambient air for 60 d. The charge/discharge capacities for the initial cycle are 75/69 and 60/53 mAhg−1 to both NZSP and NCTP of two full cells, respectively. However, discharge capacities are boosted up for both these cells without much loss in coulombic efficiency even after 10 cycles.
Citation
Integrated Ferroelectrics, 238(1), 334-342, 2023