EQ-STC-SSI-S is a small splittable test cell with optical grade quartz widow to analyze the interface of solid-state battery electrodes, mainly dendrite growth, via an optical microscope. Two small plates driven by screws would press the cathode, solid electrolyte, and anode electrode together.
Test Cell
The cell case is made of Nylon
Sealed by the silicone O-rings which is liquid-tight and air-tight
Two pressing plates are made of stainless steel 304 with the gold coating
Two brass pressing screws for Cathode ad Anode
Max Force: 1500N
Note: May use a digital torque wrench to apply force accurately.
Quartz Observation Window
The window is made of optimal grade quartz glass
Diameter: 50.8 mm
Thickness: 0.5 mm
Most microscope lenses are compatible
Only clean the glass with lens wipes.
Note: Glass is fragile and can be attached to the case with adhesive. Please handle with extreme care. In case of fracture or debonding, please click the link to order replacement glasses SSI-WD
Standard fixture for solid-state electrolyte: 6 mm × 6 mm × 1.5 mm
Optional fixtures up to 12 × 12 × 1.5 mm
Springs
Test piece is compressed and held in place by two compression springs.
Material: SUS 304
Spring Rate / Stiffness: 0.588 N/mm (60 g/mm)
Dimensions when free: 4 mm OD × 3.2 mm ID × 16 mm L
Length under maximum compression: 4.4 mm
Please contact MTI to order replacement springs.
Dimensions
Assembly: 105 mm L × 60 mm W × 40mm H
(Click the picture for detail)
Operational Instruction
Warranty
Battery Test Cells are considered consumables and are not covered by warranty
The gold coating on plates may be dissolved in liquid electrolyte, or even solid-liquid electrolyte. Please only use this type cell to study all-solid-state battery interface.
Application Notes
This test cell is compatible with MTI's microscope EQ-MM500T-USB.
Microscopy pictures showing Steel-Lithium-Steel interface observation at various magnifications
> X400 focus becomes difficult due to glass window.
x 50 
x100 
x200 
X400
