• 제목/요약/키워드: Zinc Air Battery

검색결과 31건 처리시간 0.026초

활성탄 종류에 따른 아연공기전지용 Cathode의 전기화학적 특성 연구 (A Study on the Electrochemical Properties of the Cathode upon Different Kinds of Activated carbon in Zinc/Air Battery)

  • 김지훈;엄승욱;문성인;윤문수;김주용;박정식;박정후
    • 한국전기전자재료학회논문지
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    • 제17권4호
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    • pp.415-421
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    • 2004
  • The voltage profile of Zinc/Air battery during discharge has very flat pattern in a given voltage range, But, if not enough the porosity in cathode, as a result of that capacity, energy and discharge voltage of batteries become low. Therefore, we focused the pore effects in activated carbon for cathode. We examined discharge voltage, specific capacity, specific energy, resistance and characteristics during the GSM pulse discharge upon different kinds of activated carbon in Zinc/Air battery, Also we measured porosity of the air cathode according to the ASTM. So we achieved improvement of specific capacity, specific energy and discharge voltage according to increase meso pores of activated carbon. We found the optimized activated carbon material for Zinc/Air battery.

휴대전화기용 아연공기전지 개발 (Development of Zinc Air Battery for Cellular Phone)

  • 엄승욱;김지훈;문성인;윤문수;김주용;박정식
    • 한국전기전자재료학회논문지
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    • 제17권9호
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    • pp.936-941
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    • 2004
  • In recent years, the rapid growth of portable electronic devices requires the high-energy density characteristics of batteries. Zinc air batteries have specific capacity as high as 820mAh/g. However, Zinc air batteries used for hearing aid applications only so far, because the atmosphere could affect it, and it has weakness in the rate capability. However, recent developments of electrode manufacturing technologies made us to overcome that weakness. And the efforts of applying zinc air batteries to portable electronic devices, especially in cellular phone application have been increased. In this paper, the effects of conducting material and polymer binder in cathode on the electrochemical characteristics were investigated. Our research team succeeded in producing 2.4Ah class zinc air battery for cellular phone application. Its volumetric energy density was 920 wh/l, and gravimetric energy density was 308 wh/kg. The volumetric energy density of our zinc air battery is two times higher than one of lithium secondary battery, and three times higher than that of alkaline manganese battery.

$MnO_2$입자 크기에 따른 아연공기전지의 특성연구 (Size Effects of the Catalyst on Characteristics of Zn/Air Batteries)

  • 김지훈;엄승욱;문성인;윤문수;김주용;육경창;박정후
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2002년도 하계학술대회 논문집 Vol.3 No.2
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    • pp.1129-1131
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    • 2002
  • Zinc Air battery obtain their energy density advantage over the other batteries by utilizing ambient oxygen as the cathode materials, and reusing cathode as recycled form. And specific capacity of zinc powder is as high as 820mAh/g. When Zinc Air battery discharged by low rate current discharge voltage profile has very flat pattern until end of voltage. But, when Zinc Air battery discharged by high rate current discharge voltage and capacity become lower. Therefore, we focused on effects of catalyst size in cathode. So we examined performance of zinc air batteries, average discharge voltage, capacity, energy, resistance. And we also obtained resistance by the GSM pulse discharge. So we have got optimum size of catalyst for Zinc Air battery.

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Zinc Air 이차전지의 구성요소 (Components in Zn Air Secondary Batteries)

  • 이정혜;김기택
    • 전기화학회지
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    • 제16권1호
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    • pp.9-18
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    • 2013
  • Zinc air 전지의 구성요소와 전지의 특징을 설명하였다. 리튬 이온 전지에 비해 월등히 높은 에너지 밀도를 가지고 있지만, 충전의 비가역성으로 인한 낮은 용량 유지 특성 때문에 zinc air 이차전지는 아직 상용화되지 못하였다. Zinc air 전지는 충방전에 관여하는 반응들의 속도가 느려서 그 반응들의 속도를 촉진해야 하는 특징이 있는가 하면 동시에 부식과 수소발생 반응의 속도는 오히려 느리게 해야 하는 까다로운 조건을 만족해야 한다. 기존의 전지들과 비교하면, 기초연구뿐 아니라, 전지의 기계적구조, 부식, 복합소재적인 요소의 적용이 더욱 필요한 연구분야라고 하겠다. 출력개선과 부식방지 그리고 공기의 공급에 대비한 물의 증발의 억제 등은 상충하는 성질을 동시에 만족해야 하는 복합소재의 특성이다.

휴대전화기용 아연공기전지 개발 (Development of Zinc Air Battery for Cellular Phone)

  • 엄승욱;김지훈;문성인;윤문수;김주용;박정식
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.2
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    • pp.1083-1088
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    • 2004
  • Zinc air batteries obtain their energy density advantage over the other batteries by utilizing ambient oxygen as the cathode materials, and reusing cathode as recycled form. And specific capacity of zinc powder is as high as 820mAh/g. Our research team succeeded in producing 2.4 Ah class zinc air battery for cellular phone application. In this paper we had studied performance of cathode according to various factors and demonstrated the performance of 2.4 Ah class zinc air battery for cellular phone application.

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PTFE함량에 따른 아연공기전지의 Cathode 특성연구 (Effects of PTFE Contents on Characteristics of Cathode for Zn Air Batteries)

  • 김지훈;엄승욱;문성인;윤문수;김주용;육경창;박정후
    • 전기화학회지
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    • 제6권3호
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    • pp.203-207
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    • 2003
  • 아연공기전지는 공기중의 산소를 사용하므로 cathode의 재활용이 가능하다는 장점이 있으며 아연의 이론용량이 820(mAh/g)로 상당히 높다 또한 아연공기전지는 저율방전에서 방전말기까지 아주 평탄한 방전전압을 유지한다. 그러나, 고율방전에서는 방전전압이 낮아지고 에너지가 감소하며 cathode에 포함되어 있는 PTF도의 함량에 따라 저항 및 기공율에 많은 변화를 보이고 있다. 이에 본 연구에서는 전지의 에너지, 방전용량, 방전전압, DC저항, GSM, ASTM에 의한 기공율 측정을 통해 cathode내의 PTFE함량이 아연공기전지에 미치는 영향을 연구하였다. 그 결과 결합제의 함량이 감소할수록 전지의 특성이 향상되었으며 $15wt\%$일 때 가장 우수한 전지특성을 얻을 수 있었다.

MnO2입자 크기에 따른 아연공기전지의 특성연구 (Size Effects of the Catalyst on Characteristics of Zn/Air Batteries)

  • 김지훈;엄승욱;문성인;윤문수;김주용;박정식;박정후
    • 한국전기전자재료학회논문지
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    • 제16권12호
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    • pp.1150-1154
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    • 2003
  • The voltage profile during discharge of the zinc air battery has very flat pattern until reach to end of discharge voltage. But, when zinc air battery is discharged by high current, the discharge voltage and energy becomes low. Therefore, we focused on effects of catalyst size to solve this problems by increasing active sites of oxygen reduction reaction. The size of catalyst was reduced from 27 to l${\mu}{\textrm}{m}$ and we examined average discharge voltage, capacity, energy, resistance and characteristics during GSM pulse discharge of zinc air battery with change of current density. And we also measured porosity of the cathode according to the ASTM. So we have got improvement of average discharge voltage and energy when catalyst was minimized and we have got optimum size of catalyst at 5${\mu}{\textrm}{m}$.

온도조건에 따른 아연-공기 전지의 전기화학적 특성 (Effect of Temperature Conditions on Electrochemical Properties for Zinc-Air Batteries)

  • 이주광;조용남
    • 한국재료학회지
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    • 제30권12호
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    • pp.687-692
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    • 2020
  • A zinc-air battery consists of a zinc anode, an air cathode, an electrolyte, and a separator. The active material of the positive electrode is oxygen contained in the ambient air. Therefore, zinc-air batteries have an open cell configuration. The external condition is one of the main factors for zinc-air batteries. One of the most important external conditions is temperature. To confirm the effect of temperature on the electrochemical properties of zinc-air batteries, we perform various analyses under different temperatures. Under 60 ℃ condition, the zinc-air cell shows an 84.98 % self-discharge rate. In addition, high corrosion rate and electrolyte evaporation rate are achieved at 60 ℃. Among the cells stored at various temperature conditions, the cell stored at 50 ℃ delivers the highest discharge capacity; it also shows the highest self-discharge rate (65.33 %). On the other hand, the cell stored at 30 ℃ shows only 2.28 % self-discharge rate.

M&S를 이용한 아연-공기전지 최적화 연구 (A Study on Optimizing Zinc-Air Batteries Using M&S)

  • 이재인
    • 한국군사과학기술학회지
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    • 제17권5호
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    • pp.688-693
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    • 2014
  • Zinc-air batteries which has various merits in the aspect of energy density, power density and price relative to lithium based second batteries were extensively investigated recently. To develope and optimize these zinc-air batteries, the method of M&S is so efficient solution to reduce price and time. Therefore, in this paper, after executing mathematical modeling, I optimized the zinc-air battery through the simulation and make bolt-cell and discharge it to compare with simulation result. As a result, predictions are well agreed with experimental results.

도전재 종류 및 함량에 따른 아연공기전지의 cathode특성연구 (Effect of the Conducting Agent on Characteristics of Cathode for Zn/Air Batteries)

  • 김지훈;엄승욱;문성인;윤문수;김주용;육경창;박정후
    • 전기화학회지
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    • 제5권2호
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    • pp.74-78
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    • 2002
  • 아연공기전지는 공기중의 산소를 사용하므로 cathode의 재활용이 가능하다는 장점이 있으며 아연의 이론용량이 820(mAh/g)으로 상당히 높다. 그러나, 아연공기전지는 cathodf치 기공이 너무 작으면 외부로부터 유입되는 산소량이 부족하여 전지의 방전전압이 낮아지는 결과를 초래하게 되며 cathode에 포함되어 있는 도전재의 함량에 따라 저항 및 기공율에 많은 변화를 보이고 있다. 이에 본 연구에서는 전지의 용량, 출력특성, 방전전압, DC저항, ASTM에 의한 기공율 측정을 통해 도전재의 종류 및 함량이 아연공기전지에 미치는 영향을 연구하였으며, Super P의 도전재를 $5wt\%$ 첨가하였을 때 가장 우수한 전지특성을 얻을 수 있었다.