Understanding crystal structures, ion diffusion mechanisms and sodium storage behaviors of NASICON materials

Recent advancements in solid electrolytes integrated into all-solid-state 2D and 3D lithium-ion microbatteries

“…190 This cell delivered 50 mA h cm À2 mm À1 capacity at the rst cycle and 24 mA h cm À2 mm À1 aer 100 cycles at electrochemical conditions of 7 mA cm À2 current and voltage window of 3-4.4 V. Though the cell provided good cyclability, a large number of grain boundaries yielded low ionic conductivity of 1.8 Â 10 À7 S cm À1 , preventing the microbattery's better performance. 190 4.5 Synthesis of crystalline SSE thin lms Although many studies have been done on the effect of synthesis and treatment of "bulk" crystalline electrolytes on their intrinsic properties, 18,167,[191][192][193] the inuence of deposition methods on these electrolytes and on their microbattery performance has not been reported explicitly. For most of the crystalline materials integrated into microbatteries, the preparation method was limited to the solid-state reaction of mixtures with required composition and then deposition on the electrode.…”

Crystal Structure of the Intermediate Na2V2(PO4)3 Phase and Electrochemical Reaction Mechanisms in NaxV2(PO4)3 (1 ≤ x ≤ 4) System

“…The refined occupancy factors for Na(1a), Na(1b), Na(2a1), and Na(2b) are 1, 0.98(8), 0.36 (7), and 0.73 (10), respectively, yielding a composition Na2.1(3)V2(PO4)3. We tested another structural model for Na2V2(PO4)3 using the space group P2/c (Model 2), which showed similar agreement factors with the following cell parameters: a =15.2380 (5) Å; b = 8.6090(5) Å; c = 8.7390(4); β = 126.289(5), V/Z= 231.01(2) Å 3 (Figure 4c). Model 2 also contains two vanadium positions, but it generates two distinct lantern units in the structure:…”

“…Na-superionic-conductor (NASICON) structured materials are considered as promising electrodes for sodium-ion batteries because of their 3D open-framework crystal structure, resulting in high cyclability and fast rate capability. [1][2][3][4][5] Among them, Na3V2(PO4)3 has been extensively studied, showing satisfactory energy density and rate performance as well as good thermal stability. [6][7][8][9][10][11][12][13] The crystal structure of Na3V2(PO4)3 is composed of repeating units called lanterns, into which two VO6 octahedra are joined together through three corner-sharing PO4 tetrahedra.…”

The advent of manganese-substituted sodium vanadium phosphate-based cathodes for sodium-ion batteries and their current progress: a focused review

“…With the increased need for low-cost and energy-efficient storage devices, the reception of MSVP-based SIBs will likely intensify in the future, and researchers will face the challenge and pleasure of making SIBs into a state-of-the-art energy storage technology. 53,54…”