Superior Ionic Transferring Polymer with Silicon Dioxide Composite Membrane via Phase Inversion Method Designed for High Performance Sodium-Ion Battery

Abstract

Superior sodium-ion-conducting polymer poly(vinyledene fluoride)–silicon dioxide (PVdF-SiO2) composite separator membrane was prepared via simple phase inversion method, which is a suitable alternative conventional polypropylene membrane. Basically, PVdF is the promising for use as high porous polymer electrolyte membrane due to its high dielectric constant (ε = 8.4). In this work, we prepared a composite membrane using PVdF-SiO2 via phase inversion method. This work was systematically studied towards the morphology, porosity, and electrochemical properties of as prepared membrane. The electrolyte uptake capability of separator membrane tested with 1 M NaPF6 electrolyte solution and temperature-dependent ionic conduction test were performed at various temperatures. This membrane exhibits higher ionic conductivity of 4.7 × 10−2 S cm−1 at room temperature. The physical properties were analyzed by X-ray diffraction, FT-IR, and FE-SEM micrographs analyses. The electrochemical performances with impedance analysis carried for prepared membrane with the as-prepared sodium P2-type cathode material. The material showed an initial discharge capacity of 178 mAh g−1 at 0.1 C between 2 and 4 V with 98% columbic efficiency and 81% capacity retention after 50 cycles upon using the as-prepared PVdF-SiO2 composite separator membrane.

Optimization of prismatic type layered electrode materials for high performance sodium battery

“…To remove the volatile solvent, the electrode was dried overnight at 60°C. The 2032 type coin cells were prepared using as‐synthesized layered P2 Na‐Ni‐Mn‐O 2 cathode material and the sodium metal anode material,1 M solution of NaPF 6 (sodium hexafluoro phosphate, 98% Sigma‐Aldrich) in propylene carbonate (Alfa Aeser 99%) as electrolyte along with PVdF/SiO 2 based separator 26 . All the cell fabrication was performed in the glove box at the moisture level of <0.1 ppm.…”

“…The electrochemical properties of the prepared P2-Na-Ni-Mn-O material were analyzed by using BCS-815/Electrochemical Analyzer (Bio-Logic, France) with 2032 type coin cell setup. The electrodes were prepared by mixing 85 wt% active material, 10 wt% conductive carbon black (Super P) (99.99%, AlfaAesar), and 5 wt% poly (vinylidene fluoride) binder (PVdF-Sigma-Aldrich) in the solvent 26 All the cell fabrication was performed in the glove box at the moisture level of <0.1 ppm. The galvanostatic charge/discharge studies were carried in the range 2.0-4.0 V @ 0.1 C at room temperature.…”

Na ion batteries: An India centric review

“…This membrane showed 4.7 × 10 −2 Scm −1 maximum ionic conductivity at room temperature. The membrane was used with sodium P2-type cathode material, which gave 178 mAh/g of initial discharge capacity at 0.1 C between 2 and 4 V. Moving forward using PVDF-SiO 2 composite separator membrane, it showed Columbia efficiency and capacity retention after 50 cycles of 98% and 81%, respectively [ 144 ].…”

High Capacity Prismatic Type Layered Electrode with Anionic Redox Activity as an Efficient Cathode Material and PVdF/SiO2 Composite Membrane for a Sodium Ion Battery

“…The 2032 type half-cells were prepared with samples of P2-Na 2/3 Ni 1/3 Mn 2/3 O 2 (both SGR, and SSR) as the cathode and the sodium metal as the anode. A 1 M solution of NaClO 4 (sodium perchlorate, 98% Sigma-Aldrich, Saint Louis, USA) was dissolved in 1:1 wt % of EC/PC (ethylene carbonate/propylene carbonate, Alfa Aeser 99%, heysham, England) was used as an electrolyte and the high ionic conductive PVdF-SiO 2 composite membrane was used as separator [24]. All the preparations were carried out in a glove box at inert atmosphere.…”