Operando Optical Microscopy Split Cell for Battery Interfacial Dendrite Characterization, CBIDCOOMSC

An operando optical microscopy split cell is a custom-designed electrochemical reactor that allows researchers to "watch" the internal life of a battery through a microscope while it operates. It is primarily used to study interfacial phenomena—the critical events that happen at the boundary where the electrode meets the electrolyte. It is mainly used to study the following aspects:  (1) Dendrite Nucleation & Growth: In Lithium or Zinc-metal batteries, optical microscopy is the primary tool to watch needle-like "dendrites" grow from the anode. This helps determine the "critical current density" before a short circuit occurs. (2) Solid Electrolyte Interphase (SEI) Formation: While SEI is nanometric, optical interference microscopy can track its formation as a darkening or color change on the electrode surface. (3) Electrode Swelling/Mechanical Stress: You can observe the physical expansion of particles (like Silicon) during lithiation and see if they crack or lose contact with the current collector. (4) Gas Evolution: Tracking the nucleation of bubbles (CO2, H2) at the interface, which indicates electrolyte degradation or overcharging.