A liquid electrochemical memory device is provided. In one aspect, the device includes a memory region for storing at least two bits, the memory region having a first volume; and a liquid electrolyte region fluidically connected to the memory region, the liquid electrolyte region having a second volume larger than the first volume. The device further includes a working electrode exposed to the memory region, and a counter electrode exposed to the liquid electrolyte region. The device also includes an electrolyte filling the memory region and the liquid electrolyte region, in physical contact with the working electrode and the counter electrode, the electrolyte including at least two conductive species. The device further includes a control unit for biasing the working electrode and the counter electrode.