• Title, Summary, Keyword: Exchange membrane fuel cell

Search Result 436, Processing Time 0.051 seconds

The Effect of Ion Exchange Membrane on the Electrical Conduction in Metal Fuel Cell (금속연료전지에서 이온교환막이 전기전도에 미치는 영향)

  • Kim, Yong-Hyuk
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.59 no.12
    • /
    • pp.2235-2239
    • /
    • 2010
  • In this study, The cation exchange membrane and the anion exchange membrane affect in electrical conduction of metal fuel cell was investigated. Magnesium material as anode electrode and the NaCl solution dissolved with 5~15wt% as electrolyte were used for the metal fuel cell. It was found that magnesium slag where flows toward the air electrode was suppressed by using ion exchange membrane. The open circuit voltage variation during discharge has very flat pattern by using ion exchange membrane, but the case which is not the exchange membrane, the open circuit voltage increased according to time. When using the anion exchange membrane, the electric current was higher case of the cation exchange membrane, as a result of higher equivalent conductivity in anion Cl-. The cation exchange membrane was observed with the fact that the output power is excellent in compared with anion exchange membrane.

Problems and Solutions of Anion Exchange Membranes for Anion Exchange Membrane Fuel Cell (AEMFC) (음이온교환막연료전지용 음이온교환막의 문제점과 해결방안)

  • Son, Tae Yang;Kim, Tae Hyun;Kim, Hyoung Juhn;Nam, Sang Yong
    • Applied Chemistry for Engineering
    • /
    • v.29 no.5
    • /
    • pp.489-496
    • /
    • 2018
  • Fuel cells are seen as eco-friendly energy resources that convert chemical energy into electrical energy. However, proton exchange membrane fuel cells (PEMFCs) have problems such as the use of expensive platinum catalysts for the reduction of conductivity under high temperature humidification conditions. Thus, an anion exchange membrane fuel cell (AEMFC) is attracting a great attention. Anion exchange fuel cells use non - Pt catalysts and have the advantage of better efficiency because of the lower activation energy of the oxygen reduction reaction. However, there are various problems to be solved including problems such as the electrode damage and reduction of ion conductivity by being exposed to the carbon dioxide. Therefore, this mini review proposes various solutions for different problems of anion exchange fuel cells through a wide range of research papers.

Development of the Direct Borohydride Fuel Cell for Portable Power Source (이동전원용 직접 붕소 연료전지 개발)

  • Yang, Tae-Hyun;Lee, Jung-Woo;Park, Jin-Soo;Lee, Won-Yong;Kim, Chang-Soo
    • New & Renewable Energy
    • /
    • v.3 no.1
    • /
    • pp.68-74
    • /
    • 2007
  • The fuel cells for portable application are attracted using a liquid fuel such as methanol and chemical hydride solutions. Recently, DBFC [Direct Borohydride Fuel Cell] is a candidate for power of portable electronic devices. In this work, the anion exchange membrane and non-precious catalyst for the DBFC were concerned. Anion-exchange membrane was fabricated by amination of polysulfone followed chloromethylation. Non-precious catalysts such as raney-Ni and Ag were used as an anode and cathode catalyst. The optimum conditions of catalyst slurry mixing and MEA fabrication were developed. The single cell performance using anion exchange membrane and non-precious catalyst was evaluated and the results were compared with cation exchange membrane [Nafion membrane] and precious catalysts.

  • PDF

Prediction of Fuel Cell Performance and Water Content in the Membrane of a Proton Exchange Membrane Fuel Cell (고분자 전해질 연료전지의 전해질 막내의 함수율과 성능 예측)

  • Yang, Jang-Sik;Choi, Gyung-Min;Kim, Duck-Jool
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.14 no.6
    • /
    • pp.151-159
    • /
    • 2006
  • A one-dimensional numerical analysis is carried out to investigate the effects of inlet gas humidities, inlet gas pressures, and thicknesses of membrane on the performance of a proton exchange membrane fuel cell. It is found that the relative humidity of inlet gases at anode and cathode sides has a significant effect on the fuel cell performance. Especially, the desirable fuel cell performance occurs at low relative humidity of the cathode side and at high humidity of the anode side. In addition, an increase in the pressure ranging from 1 atm to 4 atm at the cathode side results in a significant improvement in the fuel cell performance due to the convection effect by a pressure gradient toward the anode side, and with decreasing the thickness of membrane, the fuel cell performance is enhanced reasonably.

Development and Application of High Temperature Proton Exchange Membrane Fuel Cells (고온형 고분자전해질연료전지용 MEA 개발 및 응용)

  • Lim, Tae-Hoon;Kim, Hyoung-Juhn
    • Transactions of the Korean hydrogen and new energy society
    • /
    • v.18 no.4
    • /
    • pp.439-445
    • /
    • 2007
  • Proton exchange membrane Fuel Cells(PEMFCs) have been spotlighted because of their broad potential application for potable electrical devices, automobiles and residential usages. However, their utilization is limited to low temperature operation due to the electrolyte dehydration at high temperature. High temperature PEMFC operation offers high CO tolerance and easy water management. This review presents development of high temperature($120{\sim}200^{\circ}C$) PEMFC. Especially, PEMFC which is based on acid-doped PBI membrane is discussed.

Development of Anion Exchange Membrane based on Crosslinked Poly(2,6-dimethyl-1,4-phenylene oxide) for Alkaline Fuel Cell Application (화학적 가교를 이용한 Poly(2,6-dimethyl-1,4-phenylene oxde)계 음이온 교환막의 제조 및 알칼리 연료전지용 특성평가)

  • Sung, Seounghwa;Lee, Boryeon;Choi, Ook;Kim, Tae-Hyun
    • Membrane Journal
    • /
    • v.29 no.3
    • /
    • pp.173-182
    • /
    • 2019
  • Much research has been made for finding new and eco-friendly alternative sources of energy to solve the problems related with the pollution caused by emissions of greenhouse gases such as carbon dioxide as the use of fossil fuels increases worldwide. Among them, fuel cells draws particular interests as an eco-friendly energy generator because only water is obtained as a by-product. Anion exchange membrane-based alkaline fuel cell (AEMFC) that uses anion exchange membrane as an electrolyte is of increased interest recently because of its advantages in using low-cost metal catalyst unlike the PEMFC (potton exchange membrane fuel cell) due to the high-catalyst activity in alkaline conditions. The main properties required as an anion exchange membrane are high hydroxide conductivity and chemical stability at high pH. Recently we reported a chemically crosslinked poly(2-dimethyl-1,4-phenylene oxide) (PPO) by reacting PPO with N,N,N',N'-tetramethyl-1,6-hexanediamine as novel anion exchange membranes. In the current work, we further developed the same crosslinked polymer but having enhanced physicochemical properties, including higher conductivity, increased mechanical and dimensional stabilities by using the PPO with a higher molecular weight and also by increasing the crosslinking density. The obtained polymer membrane also showed a good cell performance.

An Experimental Study of Short Stack on the Performance of the Proton Exchange Membrane Fuel Cell for the Residential Power generation (소형 모듈 스택을 이용한 가정용 연료전지 성능의 실험적 고찰)

  • Choi, Won-Seok;Kim, Yong-Mo;Yu, Sang-Seok;Lee, Young-Duk;Hong, Dong-Jin;Ahn, Kook-Young
    • 한국신재생에너지학회:학술대회논문집
    • /
    • /
    • pp.21-24
    • /
    • 2008
  • Proton Exchange Membrane Fuel Cell (PEMFC) is an attractive candidate for residential power generator due to fast start-up and stop, high efficiency, low emission, and high power density. In this study, we employ short module stack to understand the performance of the unit cell of the stack in terms of operating temperatures. To simulate the practical fuel cell stack of residential power generator, the structure and active area of the short module stack is kept the same as that of the practical fuel cell. The results shows that the electric potential of short module stack is different from the number of cells times the potential of unit cell because of cell-to-cell variation.

  • PDF

Power System Development of Unmanned Aerial Vehicle using Proton Exchange Membrane Fuel Cell (고분자 전해질 연료전지를 이용한 무인비행체 동력시스템 설계)

  • Jee, Yeong-Kwang;Sohn, Young-Jun;Park, Gu-Gon;Kim, Chang-Soo;Choi, Yu-Song;Cho, Sung-Baek
    • Transactions of the Korean hydrogen and new energy society
    • /
    • v.23 no.3
    • /
    • pp.250-255
    • /
    • 2012
  • In this paper, the development and performance analysis of a fuel cell-powered unmanned aerial vehicle is described. A fuel cell system featuring 1 kW proton exchange membrane fuel cell combined with a highly pressurized fuel supply system is proposed. For the higher fuel consumption efficiency and simplification of overall system, dead-end type operation is chosen and each individual system such as purge system, fuel supply system, cooling system is developed. Considering that fluctuation of exterior load makes it hard to stabilize fuel cell performance, the power management system is designed using a fuel cell and lithium-ion battery hybrid system. After integration of individual system, the performance of unmanned aerial vehicle is analyzed using data from flight and laboratory test. In the result, overall system was properly operated but for more duration of flight, research on weight lighting and improvement of fuel efficiency is needed to be progressed.

Preparation of pore-filling membranes for polymer electrolyte fuel cells and their cell performances (고분자 연료전지용 세공충진막의 제조 및 연료전지 특성)

  • Choi, Young-Woo;Park, Jin-Soo;Lee, Mi-Soon;Park, Seok-Hee;Yang, Tae-Hyun;Kim, Chang-Soo
    • 한국신재생에너지학회:학술대회논문집
    • /
    • /
    • pp.278-281
    • /
    • 2009
  • Proton exchange membrane is the key material for proton exchange membrane fuel cells (PEMFC). Currently widely-used perfluorosulfonic acid membranes have some disadvantages, such as low thermal stability, easy swelling, excessive crossover of methanol and high price etc. Other membranes, including sulfonated polymer, radiation grafted membranes, organic-inorganic hybrids and acid-base blends, do not satisfy the criteria for PEMFC, which set a barrier to the development and commercialization of PEMFC. Pore-filling type proton exchange membrane is a new proton exchange membrane, which is formed by filling porous substrate with electrolytes. Compared with traditional perfluorosulfonic acid membranes, pore-filling type proton exchange membranes have many advantages, such as non- swelling, low methanol permeation, high proton conductivity, low cost and a wide range of materials to choose. In this research, preparation methodology of pore-filling membranes by particularly using all hydrocarbon polymers and fuel cell performances with the membranes are evaluated.

  • PDF

Experimental studies on Flooding in the PEM Fuel Cell at various RH (상대습도 변화에 따른 PEM Fuel Cell 내에서의 플러딩에 관한 실험적 연구)

  • Kim, Kyoung-Rock;Han, Seong-Ho;Aim, Deuk-Kuen;Choi, Young-Don
    • Proceedings of the KSME Conference
    • /
    • /
    • pp.2385-2389
    • /
    • 2008
  • This is the experimental research that tries to explain a variety of RH is how to affect the cell performance and the flooding phenomenon of proton exchange membrane fuel cell (PEMFC). A value of PH changes to 0%, 50% and 90% as its variation, either stoichiometric flow rate changes to 1.5, 2 and 4. Into the comparison between theoretical and experimental value, this study analyzes that a variety of PH is how 10 affect flooding in the cathode of the proton exchange membrane fuel cell. The effect of air stoichiometry, air humidity and different flow fields are also discussed in this paper This study has accomplished the measurement of performance as the variety of RH in the cathode of proton exchange membrane fuel cell, moreover it has recorded the visualization of flooding in the cathode with a high-speed micro camera.

  • PDF