AC Impedance를 이용한 알칼라인 건전지의 전기 화학적 특성 분석

황규연; 황성민; 고희찬; 전병욱; 여태환

HWAHAK KONGHAK, Vol.37, No.5, 729-733, October, 1999

Export Citation

AC Impedance를 이용한 알칼라인 건전지의 전기 화학적 특성 분석

Electrochemical Characterization of an Alkaline Battery with AC Impedence

황규연, 황성민, 고희찬, 전병욱, 여태환

초록

알칼라인 아연-이산화망간 건전지의 방전 및 저장 중에 일어나는 역동적 거동을 이해하기 위하여, 단위전지를 자체 제작하고 펄스 및 자기 방전으 실시하면서 방전 또는 저장 단계별로 AC Impedence 분석을 실시하여 ohmic resistance, polarization resistance, double layer capacitance 값을 구하고 비교 분석하였다. 알칼라인 단위 전지 내부에 Hg/HgO microreference 전극을 삽입하여, 방전의 경우에는 이산화망간 posotive 전극의 전기전도도 감소와 OH^-이온의 starvation 현상으로 전지의 내부저항이 증가하고, 저장이나 휴지의 경우에는 아연 negative 전극의 부식으로 전지의 내부저항이 증가하는 것을 확인할 수 있었다.

To understand the dynamic behavior of an alkaline zinc-manganese dioxide battery. AC impedence analysis was performed with pulse discharged and self-discharged cells. To observe the variations of open circuit voltages and internal resistances of both positive and negative electrodes, the Hg/HgO micro-reference electrode was inserted between a separator and a positive electrode. While the internal resistance increased at the positive electrode dominated cell performance during pulse discharge, the internal resistance increased mainly at the negative electrode due to the by zinc corrosion during self-discharge.

Keywords:Alkaline Battery;AC Impedence;Discharge Performance;Pulse Discharge;Self-Discharge;Micro-Reference Electrode

[References]

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[1] Bard AJ, Faulkner LR, "Electrochemical Methods," John Wiley & Sons, New York, NY (1980)

[2] Greef R, Peat R, Reter LM, Pletcher D, Robinson J, "Instrumental Methods in Electrochemistry," Ellis Horwood, New York, NY (1993)

[3] Karunathilaka SAGR, Hampson NA, Leek R, Sinclair TJ, J. Appl. Electrochem., 11, 365 (1981)

[4] Karunathilaka SAGR, Hampson NA, Leek R, Sinclair TJ, J. Appl. Electrochem., 11, 715 (1981)

[5] Macdonald JR, "Impedance Spectroscopy," Wiley/Interscience, New York, NY (1987)

[6] Barnard R, Baugh LM, Randell CF, J. Appl. Electrochem., 17, 165 (1987)

[7] Barnard R, Baugh LM, Randell CF, J. Appl. Electrochem., 17, 174 (1987)

[8] Kodesch KV, "Batteries Volume I," Marcel Dekker Inc., New York, NY (1974)

[9] Gopikanth ML, Sathyanarayana S, J. Appl. Electrochem., 9, 581 (1979)