09060 IUPAC Gold Book - electrode 10.1351/goldbook.09060 09060 current 1 Electron conductor in an electrochemical cell connected to the external circuit. Half-cell consisting of at least one electron conductor and at least one ionic conductor (electrolyte). The current flow through electrochemical cells may be zero or non-zero. An electrochemical cell with current flow can operate either as a galvanic cell or an electrolytic cell. In some electroanalytical techniques (conductometry and differential potentiometry), two indicator electrodes are used. For many analytical measurements in cells with current flow, a three-electrode cell is used. Many types of electrodes are used. These may be classified into groups according to their composition, form and size, and according to their operating mode. auxiliary electrode https://goldbook.iupac.org//terms/view/09132 conductometry https://goldbook.iupac.org//terms/view/09166 electrochemical cell https://goldbook.iupac.org//terms/view/09058 electrolyte https://goldbook.iupac.org//terms/view/09061 electrolytic cell https://goldbook.iupac.org//terms/view/09062 galvanic cell https://goldbook.iupac.org//terms/view/09066 non-polarizable electrodes https://goldbook.iupac.org//terms/view/09078 potentiometry https://goldbook.iupac.org//terms/view/09127 three-electrode cell https://goldbook.iupac.org//terms/view/09081 PAC, 2020, 92, 641. 'Terminology of Electrochemical Methods of Analysis (IUPAC Recommendations 2019)' on page 647 (https://doi.org/10.1515/pac-2018-0109) https://goldbook.iupac.org/terms/view/09060/html https://goldbook.iupac.org/terms/view/09060/json https://goldbook.iupac.org/terms/view/09060/plain Citation: 'electrode' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.09060 The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. 2026-05-30T23:27:22+00:00