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Split Test Cell with Quartz Window for Battery Electrode In-situ Raman Analysis: Optional Insert Size & Au Coating - EQ-STC-QW

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Inserts Size:


EQ-STC-QW split-able test cell is designed for R&D of rechargeable battery material. A 16.8 mm Dia. quartz window on its bottom allows in-situ Raman analysis of battery material phase transition during charging and discharging. Such a cell can accept various sizes (19, 20, and 24 mm diameter) of electrodes and separators and test the electrodes easily and quickly.
Note: Customized (Au coated) test cells are non-returnable and non-exchangeable.



  • Electrolyte corrosive-proof PTFE Guide Sleeve capable of withstanding up to 250 ºC. (Please select the size of the PTFE sleeve I.D. at Product Options: 5,10,12,15,19,20,and 24 mm) 
  • Sealed by electrolyte corrosive-proof PTFE O-rings.
  • A 6 mm height spacer inside the test cell to press down on the electrode and prevent the electrode from curling.
  • Small enough to be put in and taken out from a glove box.
  • Easy to separate and clean after testing.
  • Same functionality to "Swagelok Coin Cell" but with more size options for electrode and separator and also the proper dimensions for glove box compatibility.
  • Stainless Steel
  • Quartz Window
  • PTFE Sleeve
  • PRFE O-ring
  • Height: 67mm min. without load.
  • Diameter: 63mm (widest diameter without lead.)
  • Lead exposed length: 21mm
  • Quartz Window: ⌀17mm
  • Quartz Window fixture: ⌀42mm
Quartz Observation Window

  • Observation Area = 2.0 mm Dia. Quartz Observation Window allows the X-Ray beam penetration
  • Customized split cell with enlarged observation area up to 8.0 mm Dia. is available at extra cost (See picture below)
  • Quartz Window Size = 16.8 mm Dia. 
  • Thickness = 1.92 mm
  • Recessed Spacing = 6.00 mm
Max. Working Temperature
  • 250 ºC 
PTFE Sleeve Size Option

  • PTFE (white) sleeve around a stainless steel pressing pad.
  • PTFE sleeve I.D.: 5,10,12,15,19,20,and 24 mm
  • Choose one at Product Options
O-ring O.D. I.D.
Quartz window O-ring 15mm 11mm
Spring compression O-ring 24mm 17mm
Top/Bottom contact O-ring 38mm 31mm
Bolt Type Head Height Head Diameter
Top and bottom split cell fastening 4mm Hex 5mm 7.8mm
Quartz window fastening 3mm Hex 4.2mm 6.8mm

  • Please contact us for purchasing multiple or various-sized PTFE sleeves.
  • Anti-corrosive Au coating on the cell internal and inserts is an option. $396 surcharge will apply.
Max. Cell Thickness Cathode+separator+anode: 6mm
Detailed Illustration of the Test Cell   (click the picture to enlarge)
Installation and Operation Notices (click the pictures right to see the details)   
Note: First two photos (left and middle) show the what's included in the split cell tester.
Demo Video(how to do battery research by the split cell )  
Application Notes
  • For In-situ Laser Raman Spectroscopy, the typical wavelength used is ranging from ultra-violet (244 nm~364 nm) to near infrared (785 nm~1064 nm). The quartz observation window we used can provide  >80% light-throughput for this wavelength range.
  • For better in-situ observation, electrode material shall face the window.  you may use lab press and dry pressing die below to prepare an electrode pellet instead of using electrode coated Al or Cu foil.
  • Optional: Purchase a vacuum pen for easy component placement.

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1. Prices listed online are valid for US market and whom pay by credit card only. There will be extra charges for shipping & handling. Price various from country to country.
2. We may add extra charges for paper order and net30 terms due to extra labor cost.
3. The prices listed are subject to change without notice.