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Electrochemical Renewal Method for Enhancing Cyclic Ability of Lead-Acid Battery

납축전지의 사이클 성능향상을 위한 전기화학적 재생방법

  • Tae, Uk (Dept. Industrial Engineering Chemistry, Chungbuk National University) ;
  • Yang, Jeong-Jin (Dept. Industrial Engineering Chemistry, Chungbuk National University) ;
  • Hong, Kyoung-Mi (PureEchem co. ltd.) ;
  • Kim, Han-Joo (PureEchem co. ltd.) ;
  • Park, Soo-Gil (Dept. Industrial Engineering Chemistry, Chungbuk National University)
  • Received : 2012.07.09
  • Accepted : 2012.08.30
  • Published : 2012.08.31

Abstract

The lead-acid batteries are the most often used in human life, because of their low cost, good reversibility and high potential but they have limit cycle ability with low capacitance. The main causes of this problem are forming recrystallization of $PbSO_4$ on electrodes surface during cycles which the recrystallization of $PbSO_4$ is known as sulfation. In this study, formation process of sulfation was investigated depending on charge and discharge cycle numbers. And we decomposed sulfation to renew cycle ability of lead-acid batteries. The renewed lead-acid batteries recovered to 84% compared to first capacity after 600 cycles.

납축전지는 낮은 가격과 가역적인 반응으로 재사용이 가능하고 높은 기전력을 가져 우리 생활에 가장 널리 사용되고 있지만 제한된 사이클 수명을 가지고 있다. 제한된 사이클 수명은 충전과 방전 과정을 거치면서 전극 표면에 형성되는 $PbSO_4$의 재결정 반응인 Sulfation 때문이다. 본 연구에서는 납축전지의 사이클 진행에 따른 전극 표면 변화를 관찰하였고, 납축전지에 펄스 전류를 인가하여 재생한 전극 표면을 관찰하였다. 납축전지는 600 사이클 후 재생 시 초기 용량의 약 84%까지 용량이 회복하는 특성을 관찰하였다.

Keywords

References

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Cited by

  1. An Empirical Study on the Application of Lead-Acid Batteries to ESSs and Performance Improvement Methods vol.15, pp.5, 2015, https://doi.org/10.6113/JPE.2015.15.5.1295