High Purity Selenium (Se, >99.99%, 200 mesh) Powder for Aqueous Zn-Se Battery Cathode, 50-200 g/Bottle, CAZSBCHPSe
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High-purity selenium (Se) powder is an advanced chalcogen cathode material for aqueous rechargeable batteries—most notably aqueous zinc-selenium (Zn-Se) systems. Positioned conceptually between sulfur and tellurium in Group 16, selenium offers a compelling combination of high volumetric capacity, superior electronic conductivity relative to sulfur, and reversible multi-electron conversion redox kinetics.
The key electrochemical advantages of the Se powder for aqueous Zn-Se battery are: (1) Reversible Conversion / Intercalation Redox Couple:: Elemental iodine is intrinsically an electrical insulator. To unlock high rate capabilities, high-purity I2 powder must be thoroughly blended and ball-milled with conductive carbon hosts (such as Super P, multi-walled carbon nanotubes, graphene, or porous carbon frameworks) that provide a continuous electronic pathway. (2) High Volumetric and Gravimetric Capacity: Elemental selenium delivers a high theoretical specific capacity (~ 675 mAh/g) based on a two-electron transfer). More importantly, because of its high tap density compared to sulfur (~ 4.82 g/cm}^3), it achieves a remarkably high volumetric energy density, making it attractive for space-constrained cell designs. (3) Superior Intrinsic Electronic Conductivity: Unlike sulfur—which is a severe electronic insulator (~ 10^{-30} S/cm) requiring massive amounts of conductive carbon—selenium is a semi-metal with an electrical conductivity several orders of magnitude higher (~ 10^{-5} S/cm or better depending on allotrope), which facilitates faster charge transfer and lower internal polarization.
| Part Number |
CAZSBCHPSe (C-AZSB-C-HPSe) |
| CAS |
7782-49-2 |
| Purity |
>99.99% |
| Appearance |
Gray or greyish-black |
| Molar Mass |
78.96 g/mol |
| Particle Size |
200 mesh |
| Density |
4.81 g/mL at 25 °C (lit.) |
| Melt Point | 217 °C (lit.) |
| Package Grade |
50 g, 100 g, and 200 g/bottle |
References:
- L. Ma, et al. Electrocatalytic Selenium Redox Reaction for High-Mass-Loading Zinc-Selenium Batteries with Improved Kinetics and Selenium Utilization, Adv. Energy Mater., 2025, 15, 2404426
- X. Yuan, et al. Interfacial Modification of a Zn Anode by Amorphous Se toward Long-Life and Hydrogen Evolution-Free Aqueous Rechargeable Batteries, ACS Appl. Mater. Interfaces (2023) 15 (41): 48225–48234.