Operando In-Planar Raman Split Cell (I.D. = 10 mm) for Battery Characterization, CBCOIPRSC

An operando in-planar Raman split cell (also known as a "top-down" or "face-on" cell) is designed to characterize the phase transitions and chemical changes on the surface of an electrode during cycling. Unlike the cross-sectional view, the in-planar configuration focuses on the electrode-electrolyte interface from the perspective of the current collector or the separator. In this setup, the laser enters through a transparent window that is positioned directly above the working electrode. (1) Optical Window: Typically made of Sapphire or Quartz. Sapphire is highly preferred for solid-state applications because it can withstand the high mechanical stack pressures (MPa) required for contact without cracking. (2) Aperture Current Collector: To allow the laser to reach the active material, the current collector (usually a metal foil) must have a small hole or be replaced by a fine metal mesh (Gold or Stainless Steel).