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    • 5. 发明授权
    • Apparatus and method for measuring electrochemical impedance at high speed
    • 高速电化学阻抗测量装置及方法
    • US06339334B1
    • 2002-01-15
    • US09507460
    • 2000-02-22
    • Su-moon ParkJung-suk Yoo
    • Su-moon ParkJung-suk Yoo
    • G01N2742
    • G01N27/416
    • An apparatus and method for measuring an electrochemical impedance at high speed. The method for measuring the electrochemical impedance of an electrolyte at high speed includes applying a direct current (DC) voltage having the reaction potential of the electrolyte to the electrolyte via a counter electrode and, after a delay, applying a signal voltage, including a DC voltage added to a differentiated or integrated Dirac-delta function voltage, to the electrolyte; computing a digital data value related only to the differentiated or integrated Dirac-delta function voltage, obtained by converting signal current flowing in a working electrode via the electrolyte into a voltage, integrating or differentiating the voltage, and Fourier transforming the result of the integration or differentiation; and obtaining changes in magnitude and phase as a function of frequency based on the Fourier transform, to compute the impedance. By investigating impedances computed at intervals upon the application of a reaction potential and upon the application of a step voltage plus the reaction potential to the electrolyte, the influence of mass transfer and electron transfer in the electrolyte on the impedance measurement can be understood.
    • 用于高速测量电化学阻抗的装置和方法。 用于测量电解质在高速下的电化学阻抗的方法包括通过反电极将具有电解质的反应电位的直流(DC)电压施加到电解质上,并且在延迟之后施加包括DC的电压 电压加到差分或集成的狄拉克三角函数电压; 计算仅通过将在工作电极中经由电解质流动的信号电流转换成电压,积分或微分电压而获得的微分或积分狄拉克 - 三角函数电压的数字数据值,以及对积分的结果进行傅里叶变换, 分化 并且基于傅立叶变换获得作为频率的函数的幅度和相位的变化,以计算阻抗。 通过研究在施加反应电位时间隔计算的阻抗,并且当施加步进电压加上电解质的反应电位时,可以理解电解质中的传质和电子传递对阻抗测量的影响。