{"product_id":"cstk","title":"Supercapacitor Testing Kit with Electrode, Gel Electrolyte, and Cell, CSTK","description":"\u003cp\u003eBuilding a complete supercapacitor testing kit requires three fundamental pillars: a high-precision test cell, high-purity electrode materials, and a compatible electrolyte. For research-grade results, using a dedicated split test cell is superior to standard coin cells as it allows for rapid electrode replacement and manual pressure adjustment.\u003c\/p\u003e\n\u003cp\u003e(1) The most common platform for laboratory testing is the \u003cstrong\u003eSplit Test Cell\u003c\/strong\u003e. These are often made of high-quality stainless steel or PEEK (polyether ether ketone), or PMMA and feature a split design that allows you to easily insert and remove your carbon electrodes and separator without the need for a specialized crimping machine.\u003c\/p\u003e\n\u003cp\u003e(2) The performance of your supercapacitor is primarily defined by the surface area of your electrode. For a standard testing kit, you will need a high-surface-area carbon and a separator that facilitates fast ion flow. (a) \u003cstrong\u003eActive Material\u003c\/strong\u003e: Activated Carbon with a surface area above 1,500 m²\/g is the industry standard. (b) \u003cstrong\u003eCurrent Collector\u003c\/strong\u003e: Carbon Coated Aluminum Foil is highly recommended for the current collector to ensure low contact resistance. (3) \u003cstrong\u003eSeparator\u003c\/strong\u003e: Glass Fiber Filters (like the Whatman GF\/A) are commonly used in research because they have excellent thermal stability and high porosity, which helps in absorbing and holding the liquid electrolyte.\u003c\/p\u003e\n\u003cp\u003e(3) The electrolyte determines the voltage window and the safety profile of the testing supercapacitor device. (a) \u003cstrong\u003eAqueous Electrolytes\u003c\/strong\u003e: Using 6M KOH or 1M H2SO4 is common for initial testing. These are low-cost and offer high ionic conductivity, but are limited to a voltage of around 1.0 V. (2) \u003cstrong\u003eOrganic Electrolytes\u003c\/strong\u003e: For higher energy density, researchers use salts like TEABF4 dissolved in acetonitrile. This allows you to reach up to 2.7 V or higher. (3)\u003cstrong\u003e Ionic Liquids\u003c\/strong\u003e: For cutting-edge research, ionic liquids like EMIM-TFSI provide the widest voltage window and best safety (non-flammable) but are more expensive. \u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"width: 100%; height: 1679.4px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 30.2158%; height: 35.6px;\"\u003e\u003cem\u003ePart Number\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.4245%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003eCSTK (C-S-TK)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 1643.8px;\"\u003e\n\u003ctd style=\"width: 30.2158%; height: 1643.8px;\"\u003e\u003cem\u003eTesting Kit Components\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 69.4245%; height: 1643.8px;\"\u003e\n\u003cdiv style=\"text-align: start;\"\u003e(1) Self-Standing Electrode: Activated carbon electrode (5cm*5cm, 11 mg\/cm2, YP50F: Carbon Black: PTFE= 85:10:5)\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\n\u003cp\u003e   \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CSTKEGEC_01_160x160.png?v=1770401118\" style=\"float: none;\" width=\"116\" height=\"116\"\u003e\u003c\/p\u003e\n\u003cp\u003e      Other options of MnO2 and Co3O4 can be additionally purchased here: \u003ca href=\"https:\/\/echemsupplies.com\/products\/cssses?variant=47342385168614\"\u003eCSSSES\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e(2) Flexible Gel Electrolytes: \u003c\/p\u003e\n\u003cp\u003e     \u003cimg height=\"101\" width=\"116\" style=\"float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CSTKEGEC_02_160x160.png?v=1770401864\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePoly(acrylic acid) (PAA) hydrogel sheet (L20mm*W20mm*T2mm), 5 pcs. It is mainly used for high alkaline electrolyte (eg: KOH, NaOH) and neutral electrolyte (eg: NaCl, KCl, Na2SO4) under low concentration (\u0026lt;0.2 M). Please don't apply it to acidic electrolyte and high ion concentration (\u0026gt;0.5M)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePolyacrylamide (PAM) hydrogel sheet (L20mm*W20mm*T2mm), 5 pcs. It is mainly used for zinc-based electrolyte (eg: ZnCl2, ZnSO4) and acidic H2SO4 electrolyte (eg: NaCl, KCl, Na2SO4) under high concentration (\u0026gt;3.0 M). Please don't apply it to alkaline electrolyte.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e(3) Current Collector: Graphite foil with welded tab\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CSECCWT_Graphite_Foil_160x160.png?v=1770713799\" width=\"91\" height=\"91\"\u003e\u003c\/p\u003e\n\u003cp\u003e Other options of aluminum, copper, titanium, and stainless steel foils can be additionally purchased here: \u003ca href=\"https:\/\/echemsupplies.com\/products\/cseccwt?variant=47342501986534\"\u003eCSECCWT\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e(4) Separator (W135 mm * L 1000 mm) for aqueous electrochemical supercapacitor (\u003cstrong\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eOptional, not included\u003c\/span\u003e\u003c\/strong\u003e).\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"70\" width=\"130\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CSTKEGEC_04_160x160.png?v=1770442556\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp\u003eNote: If the above gel electrolyte was selected, the separator is not necessary.\u003c\/p\u003e\n\u003cp\u003e(5) Plastic Sealing Bags (120mm*80mm, 5 pcs are included). Customer can use their own heat sealer (\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003eNot Included\u003c\/strong\u003e\u003c\/span\u003e) to seal bag with cell\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CSTKEGEC_05_160x160.png?v=1770443226\" style=\"float: none;\" width=\"101\" height=\"81\"\u003e      \u003cimg height=\"101\" width=\"132\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CSTKEGEC_06_160x160.png?v=1770443966\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp\u003e(6) Testing Cell (75mm*75mm*10mm, that is suitable for any electrode width less than 40 mm). The large one (150mm*150mm*10mm) is available upon request.\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"102\" width=\"113\" style=\"float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CSTKEGEC_07_160x160.png?v=1770444574\"\u003e\u003c\/p\u003e\n\u003cp\u003e(7) Other accessories (\u003cstrong\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eOptional, not included\u003c\/span\u003e\u003c\/strong\u003e), such as small LED panel, cell phone charging module, and multifunctional charger. \u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CSTKEGEC_09_160x160.png?v=1770745934\" style=\"float: none;\" width=\"130\" height=\"74\"\u003e \u003cimg height=\"113\" width=\"87\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CSTKEGEC_10_160x160.png?v=1770746398\" style=\"float: none;\"\u003e \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CSTKEGEC_11_160x160.png?v=1770746733\" style=\"float: none;\" width=\"116\" height=\"106\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"YWKJ","offers":[{"title":"Default Title","offer_id":47332231643366,"sku":"CSTK","price":149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CSTKEGEC_main.png?v=1770743308","url":"https:\/\/echemsupplies.com\/products\/cstk","provider":"EChem Supplies","version":"1.0","type":"link"}