Electrode for electrochemical capacitor and electrochemical capacitor using same

摘要

A negative electrode for an electrochemical capacitor includes a current collector having electric conductivity, and an electrode layer formed on a surface of the current collector and having cations stored therein. In at least a part of the electrode layer, a value of ratio Ia/Ib of peak value Ia indicating a presence of an anion decomposition compound and peak value Ib indicating a presence of an electrolyte in a spectrum of an atom forming the anion is 0.45 or more and less than 2.55 as measured using X-ray photoelectron spectroscopy.

主权项

1. An electrode for an electrochemical capacitor, comprising:
a current collector having electric conductivity; and an electrode layer formed on a surface of the current collector, having a cation stored therein, and including an anion, wherein in at least a part of the electrode layer, a value of Ia/Ib falls within a range of 0.45 or more and less than 2.55, where Ia and Ib are peak values measured by X-ray photoelectron spectroscopy method in a spectrum of an atom forming the anion, and Ia indicates a presence of a decomposition compound of the anion and peak value Ib indicates a presence of an electrolyte composed of the cation and the anion.