ELECTROCHEMICAL ANALYSIS APPARATUS AND ELECTROCHEMICAL SYSTEM

摘要

An electrochemical analysis apparatus includes a power controller, a Fourier transform unit, and a calculating unit. The power controller generates a rectangular-wave signal, a first frequency F and a duty ratio D, and applies the signal to an electrochemical cell. The Fourier transform unit performs Fourier transform on first data obtained by sampling a response signal of the cell to calculate a first frequency characteristic including a component of a second frequency integer times as high as the first frequency. The Fourier transform unit performs Fourier transform on second data, a sampling start time of which is (1/F)·D (seconds) different from the first data from which the first frequency characteristic is calculated, to calculate a second frequency characteristic including a component of the second frequency. The calculating unit calculates an impedance characteristic of the cell based on the first frequency characteristic and the second frequency characteristic.

主权项

1. An electrochemical analysis apparatus comprising:
a power controller that generates a rectangular wave signal, a frequency of which is a first frequency F and a duty ratio (TON/(TON+TOFF)) of which is D, and applies the rectangular wave signal to an electrochemical cell including a plurality of electrodes and an electrolyte; a Fourier transform unit that subjects first data obtained by sampling a response signal of the electrochemical cell to the rectangular wave signal for (1/F) second to Fourier transform and calculates a first frequency characteristic including a component of a second frequency, which is integer times as high as the first frequency, and subjects second data, a sampling start time of which is (1/F)×D (seconds) different from the data from which the first frequency characteristic is calculated, to the Fourier transform and calculates a second frequency characteristic including a component of the second frequency integer times as high as the first frequency; and a calculating unit that calculates an impedance characteristic of the electrochemical cell based on the first frequency characteristic and the second frequency characteristic.