01702 IUPAC Gold Book - differential capacitance 10.1351/goldbook.D01702 D01702 current quantity 1 Differential capacitance (per unit area of interphase or electrode; SI unit \(\pu{F m-2}\)) is given by \[C=(\frac{\partial Q}{\partial E})_{T,p,\mu _{i},...}\] where \(E\) is the potential of the electrode with respect to a reference electrode, \(\mu _{i}\) is a set of chemical potentials which are held constant, \(T\) is the thermodynamic temperature, \(Q\) is the electric charge (per unit area of interphase or electrode), and \(p\) is the pressure. chemical potentials https://goldbook.iupac.org//terms/view/C01032 electric charge https://goldbook.iupac.org//terms/view/E01923 interphase https://goldbook.iupac.org//terms/view/I03118 reference electrode https://goldbook.iupac.org//terms/view/R05229 thermodynamic temperature https://goldbook.iupac.org//terms/view/T06321 PAC, 1974, 37, 499. 'Electrochemical nomenclature' on page 509 (https://doi.org/10.1351/pac197437040499) PAC, 1983, 55, 1251. 'Interphases in systems of conducting phases (Provisional)' on page 1261 (https://doi.org/10.1351/pac198355081251) https://goldbook.iupac.org/terms/view/D01702/html https://goldbook.iupac.org/terms/view/D01702/json https://goldbook.iupac.org/terms/view/D01702/plain Citation: 'differential capacitance' 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.D01702 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. 2026-05-11T21:38:51+00:00