Piperidinium salts are derived from piperidine rings and are an important building block in the design of functional ionic liquids. These salts have good solubility and high ionic conductivity, making them suitable for electrochemical applications. Piperidinium-based ionic liquids are used as electrolytes in dye-sensitized solar cells and redox flow batteries, improving their performance and stability. They are also explored for gas separation and capture due to their ability to selectively adsorb certain gases. In addition, piperidinium ionic liquids have applications in the synthesis of new materials such as polymers and metal-organic frameworks.