Electrochemical random-access memories (ECRAMs) are three-terminal mixed ionic-electronic devices that store analog conductance states by reversibly shuttling ions between a gate reservoir and a channel. Unlike two-terminal memristors, ECRAMs decouple the read path from the write path: a separate gate electrode injects or extracts ions through a solid or gel electrolyte, modulating the channel's electronic conductance in symmetric, linear, and energy-efficient steps. This makes them a leading candidate for in-memory analog compute hardware aimed at neural-network training, where hundreds of update steps per weight demand symmetry that filamentary memristors struggle to deliver.
Researchers in this discipline work across several material families. Channel materials include conjugated polymers such as PEDOT:PSS for organic ECRAMs, and inorganic mixed conductors such as tungsten oxide (WO3), titanium oxide, and lithium-intercalation hosts (Li4Ti5O12, LiCoO2 thin films) for inorganic ECRAMs. Mobile ions span protons (H+), lithium (Li+), and increasingly sodium and oxygen vacancies. Electrolytes range from proton-conducting hydrogels and sulfonated PFSA ionomers to lithium-ion solid electrolytes such as LIPON, Li3PO4, and garnet-type LLZO thin films, and to ionic-liquid gels using imidazolium and pyrrolidinium cations.
Core experimental techniques include thin-film deposition (sputtering, atomic layer deposition, spin coating), three-terminal cyclic voltammetry and chronoamperometry to characterize ion-injection symmetry and retention, and pulsed-write protocols that emulate synaptic potentiation and depression. Endurance, retention, switching speed, and conductance linearity are the figures of merit researchers track.
EChem Supplies does not host a dedicated ECRAM product line; the supporting materials and equipment for this work are distributed across the rest of the catalog. If you are building organic ECRAMs, start with conducting-polymer inks and proton-conducting ionomers; for inorganic ECRAMs, see cathode materials and solid electrolytes; for general device fabrication, see substrates, current collectors, and electrochemical workstations.
