{"product_id":"cbssepcns","title":"Sodium Sulfide (Na2S, 99.9%) Precursor Powder for Sulfide \u0026 Halide Solid-State Electrolyte Synthesis, 25 g\/bottle, CBSSEPCNS","description":"\u003cp\u003eJust as lithium sulfide (Li2S} acts as the foundational building block for lithium-based sulfide electrolytes, sodium sulfide (Na2S) is the core precursor for sodium-biased sulfide solid-state electrolytes (such as cubic Na3PS4, clovo-borate composites, and sodium argyrodites like Na6PS5Cl). As research into sodium-ion solid-state batteries accelerates due to the abundance and low cost of sodium, understanding how to source, pre-treat, and process Na2S is critical. This precursor presents distinct challenges—specifically regarding its intense hydration states and structural polymorphic transitions—that differ significantly from its lithium counterpart.\u003c\/p\u003e\n\u003cp\u003eThe single greatest hurdle when working with Na2S is obtaining a truly anhydrous material. Commercially available sodium sulfide is overwhelmingly sold as a nonstoichiometric hydrate (Na2S * xH2O, typically where x = 5–9), often taking the form of yellow, fused flakes. Purchasing these hydrated forms for solid-state synthesis is highly discouraged because removing the bound water down to the ppm level without decomposing the sulfide is exceptionally difficult.\u003c\/p\u003e\n\u003cp\u003eSyntheses demand 99.9% (3N) anhydrous Na2S powder. (1) \u003cstrong\u003eVacuum Thermal Dehydration Protocol\u003c\/strong\u003e: If dehydrate a high-purity hydrated starting material, or if \"anhydrous\" batch has absorbed trace glovebox moisture, a multi-stage thermal vacuum profile must be used: Heat the powder under high vacuum (10^{-2} Torr or deeper) very slowly to 150°C and hold for 4 hours to remove weakly bound surface water. Increase the temperature to 300°C to 350°C and hold for an additional 12–24 hours to drive off deeply coordinated structural water. Warning: Heating too rapidly will cause the hydrated crystals to dissolve in their own water of crystallization, forming a highly corrosive liquid phase that aggressively attacks quartz or alumina glass tubes.\u003c\/p\u003e\n\u003ctable style=\"width: 100%; height: 296.087px;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 46.8875px;\"\u003e\n\u003ctd style=\"width: 30.5755%; height: 46.8875px;\"\u003e\u003cem\u003ePart Number\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.0647%; height: 46.8875px;\"\u003e\n\u003cp\u003e\u003cspan\u003eCBSSEPCNS (C-BSSE-PC-NS)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 30.5755%; height: 35.6px;\"\u003e\u003cem\u003eCAS\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.0647%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e1313-82-2\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 30.5755%; height: 35.6px;\"\u003e\u003cem\u003ePurity\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.0647%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e\u0026gt;99.9%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 30.5755%; height: 35.6px;\"\u003e\u003cem\u003eMolecular Weight\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.0647%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e78.04 g\/mol\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 30.5755%; height: 35.6px;\"\u003eWater Level\u003c\/td\u003e\n\u003ctd style=\"width: 69.0647%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e\u0026lt;0.01 wt% (battery grade)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 30.5755%; height: 35.6px;\"\u003eMelt Point\u003c\/td\u003e\n\u003ctd style=\"width: 69.0647%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e950 °C(lit.)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 30.5755%; height: 35.6px;\"\u003eDensity\u003c\/td\u003e\n\u003ctd style=\"width: 69.0647%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e1.86 g\/cm3 at 25 °C(lit.)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 30.5755%; height: 35.6px;\"\u003ePackage Grade\u003c\/td\u003e\n\u003ctd style=\"width: 69.0647%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e25 g\/bottle\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e: Please store the Na2S powder in a dry place (glovebox is preferred due to its air\/humidity sensitivity). In case any moisture adsorption, please do the vacuum (10-2 torr) drying slowly at 150-300°C for 12-24 h.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eReferences\u003c\/strong\u003e: \u003c\/span\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0378775324012163\"\u003e\u003cspan\u003eY. Yan, et al. A simple approach through reduction of Na2SO4 to prepare high-purity Na2S for sulfide electrolytes toward all-solid-state sodium batteries, Journal of Power Sources, 2024, 620, 235264\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003ca href=\"https:\/\/advanced.onlinelibrary.wiley.com\/doi\/full\/10.1002\/aenm.202505208\"\u003eH. Yang, et al. Sulfide-Based Electrolytes for All-Solid-State Sodium Batteries, \u003cspan class=\"cit-title\"\u003e\u003ci\u003eAdv Energy Mater.,\u003c\/i\u003e\u003c\/span\u003e \u003cspan class=\"cit-year-info\"\u003e2026\u003c\/span\u003e\u003cspan class=\"cit-volume\"\u003e, DOI: 10.1002\/aenm.202505208\u003c\/span\u003e\u003c\/a\u003e\u003cspan class=\"cit-pageRange\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"MKL","offers":[{"title":"Default Title","offer_id":47752072659174,"sku":"CBSSEPCNS","price":249.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CBSSEPCNS_main.png?v=1780773881","url":"https:\/\/echemsupplies.com\/products\/cbssepcns","provider":"EChem Supplies","version":"1.0","type":"link"}