Specific Electrolyte for High-Rating Sodium-Ion Battery {Na3V2(PO4)3 (NVP) + Na}, 200 g/bottle, CHRSIBSENVPNa
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For an ultra-high-rate half-cell pairing a NASICON-type Na3V2(PO4)3 (NVP) cathode with a metallic sodium (Na) anode, the electrolyte requirements diverge sharply from layered oxide systems. NVP operates at a flat, moderate voltage plateau of ~ 3.4 V vs. Na/Na+ (V^{3+}/V^{4+} redox couple) and features an open 3D interstitial network with fast intrinsic sodium hopping. Because the cathode operates comfortably below 3.8 V, high-voltage oxidative breakdown is negligible. Instead, the primary bottlenecks are Na+ desolvation kinetics, interfacial charge transfer resistance (R_ct), and dendrite-free sodium plating/stripping at high current densities (>5 C to 50 C).
Ether-based electrolytes (particularly monoglyme (DME), diglyme (G2), and tetraglyme (G4)) are unsuitable for layered oxides because they decompose oxidatively above 3.8–4.0 V}. However, for NVP (3.4 V) plateau, upper cut-off usually ≤ 3.8 V), ethers provide unmatched advantages: (1) Lower Desolvation Energy: The coordination energy between Na+ and glyme oxygen donor atoms is substantially lower than that of cyclic carbonates (EC/PC). This drops the interfacial charge-transfer resistance (R_ct) at both the carbon-coated NVP surface and the sodium-metal counter electrode by over an order of magnitude. (2) Stable Na Plating/Stripping at High Current: Pairing NaFSI with diglyme promotes an inorganic-dominated SEI (Na2S, Na2S2O4, NaF) on the metallic sodium anode. This suppresses tip-growth dendrites, enabling continuous plating and stripping at current densities exceeding 5 to 10 mA/cm2 without localized short-circuits.
| Part Number |
CHRSIBSENVPNa (C-HRSIB-SE-NVPNa) |
| Appearance |
Colorless Liquid |
| Electrolyte Composition |
Undisclosed recipe from leading manufacturer that has been well demonstrated in pilot-scale SIB. |
| Humidity Level |
<20 ppm |
| Acid Level |
<100 ppm |
| Performance |
>90% capacity retention after 500 cycles at 10C (2.5–4.25 V) (for reference only) |
| Package Size | 200 g/bottle |
Notes: Please store the specific SIB electrolyte in the glovebox due to its sensitivity to humidity.
References:
- X. Chang, et al. Solvent-Fluorine-Free, Anion-Enriched, and Non-Flammable Electrolyte Enables Safe Sodium-Ion Battery from −40 to 50 °C, Adv. Funct. Mater., 2026, 36, e15745
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M. K. Sadan, et al. Enhanced rate and cyclability of a porous Na3V2(PO4)3 cathode using dimethyl ether as the electrolyte for application in sodium-ion batteries, J. Mater. Chem. A (2020) 8 (19): 9843–9849.