Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of the Hydrophilic Treatment of Polyolefin Separator on the Electrochemical Characteristics for Ni-MH Secondary Battery

폴리올레핀계 분리막의 친수화 처리방법에 따른 Ni-MH 2차 전지의 전기화학적 특성연구

  • Song, Li-Gyu (Department of Advanced Chemicals and Engineering Graduate, Chonnam National University) ;
  • Lee, Yun-Sung (Department of Advanced Chemicals and Engineering Graduate, Chonnam National University)
  • 송리규 (전남대학교 대학원 신화학소재공학부) ;
  • 이윤성 (전남대학교 대학원 신화학소재공학부)
  • Received : 2012.12.10
  • Accepted : 2012.12.31
  • Published : 2013.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

It was investigated the electrochemical characteristics of the Ni-MH battery by hydrophilic process. For adopting the Ni-MH battery in water-electrolyte, polyolefin separator was processed the hydrophilic treatment. No treatment sample did not meet KS standard (KSC 8544) but hydrophilic treatment ones satisfied with the KS standard in electrochemical characteristics, such as discharge performance, retention capacity, and cycle performance. All hydrophilic treatment samples showed similar battery performances. Among them, sulfonation treatment sample exhibited the highest value in aspect of capacity retention rate (> 88%). Furthermore, fluoride treatment sample showed the best cycle performance during battery test. This sample maintained a good cycling performance until $1,480^{th}$ cycle, which was about 3 times as compared with that of KS standard (500 cycle).

본 연구에서는 친수화 처리된 격리막을 이용한 니켈수소전지의 전기화학적 특성을 연구하였다. 수계 전해액을 사용하는 니켈수소전지로의 적용을 위해 폴리올레핀계 분리막을 친수화 처리하였다. 친수화 미처리품은 방전성능, 용량보존성, 내구성 등의 전기화학적 성능에서 KS 규격기준에 미달되었지만 친수화 처리품은 KS 규격기준을 모두 만족시켰다. 친수화 처리품을 적용한 모든 시료는 유사한 전지성능을 보여주었다. 그 중 술폰화 처리 시료의 경우 용량 보존율(>88%) 측면에서 가장 우수한 특성을 보였으며, 불소화 처리시료는 내구성 측면에서 가장 우수한 성능을 보였는데, 이는 KS 규격기준(500회)과 비교할 때 약 3배 정도(1480회)의 우수한 성능을 유지함을 확인하였다.

Keywords

References

  1. Sebang global battery, Development of Ni-MH secondary battery for driving power of home appliances, 14-21(2009).
  2. D. Berndt, Maintenance-Free batteries third edition, 377-393(2003).
  3. Lwakura chiaki, Chemical functions of electron and ion, 1, 117-225(2005).
  4. KS standards, Sealed nickel-metal hydride secondary cells, 5-8(2009).