A carbon-based supercapacitor is usually associated with a capacitance such that the user can access its ability to store electrical charge. Three different measurement methods or variations thereof are typically employed to find the capacitance; galvanostatic charging, cyclic voltammetry and impedance spectroscopy. These three methods may give rather different capacitances, which must be interpreted with care. Here, it is discussed how one can extract consistent capacitance values from measurements obtained with the three techniques, to be interpreted within a single dynamic equivalent circuit. Different methods are compared in order to demonstrate where systematic errors occur, and how and under which conditions they can be removed. The extension of the methods presented here to pseudocapacitors utilizing both Faradaic and non-Faradaic charge storage is also briefly discussed.

碳基超级电容器通常与电容相关联，以便用户可以访问其存储电荷的能力。通常采用三种不同的测量方法或其变化形式来找到电容。恒电流充电，循环伏安法和阻抗谱。这三种方法可能会产生相当不同的电容，必须谨慎解释。在这里，讨论了如何从三种技术获得的测量值中提取出一致的电容值，以在单个动态等效电路中进行解释。比较了不同的方法，以证明发生系统错误的位置以及如何以及在何种情况下可以消除这些错误。