| 电流中断法在线测定直接甲醇燃料电池的欧姆阻抗 |
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| 引用本文： | 刘敏,王金海,王树博,谢晓峰,周涛,V.K.Mathur.电流中断法在线测定直接甲醇燃料电池的欧姆阻抗[J].中国化学工程学报,2010,18(5):843-847. |
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| 作者姓名： | 刘敏 王金海 王树博 谢晓峰 周涛 V.K.Mathur |
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| 作者单位： | 1. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;2. Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China;3. Department of Chemical Engineering, University of New Hampshire, NH 03824, USA |
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| 基金项目： | Supported by the National High Technology Research and Development Program of China (2007AA05Z150);the National Natural Science Foundation of China (50911140287, 50973055) |
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| 摘 要： | Electrochemical impedance spectroscopy (EIS) is widely used in fuel cell impedance analysis. However, for ohmic resistance (RΩ), EIS has some disadvantages such as long test period and complex data analysis with equivalent circuits. Therefore, the current interruption method is explored to measure the value of RΩ in direct methanol fuel cells (DMFC) at different temperatures and current densities. It is found that RΩ decreases as temperature increase, and decreases initially and then increases as current density increases. These results are consistent with those measured by the EIS technique. In most cases, the ohmic resistances with current interruption (RiR) are larger than those with EIS (REIS), but the difference is small, in the range from –0.848% to 5.337%. The errors of RiR at high current densities are less than those of REIS. Our results show that the RiR data are reliable and easy to obtain in the measurement of ohmic resistance in DMFC.
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| 关 键 词： | direct methanol fuel cell (DMFC) ohmic resistance current interruption method electrochemical impedance spectroscopy (EIS) membrane resistance |
| 收稿时间： | 2010-4-6 |
| 修稿时间： | 2010-4-6
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On-line Measurement for Ohmic Resistance in Direct Methanol Fuel Cell by Current Interruption Method |
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| LIU Min,WANG Jinhai,WANG Shubo,XIE Xiaofeng,ZHOU Tao,V. K.Mathur.On-line Measurement for Ohmic Resistance in Direct Methanol Fuel Cell by Current Interruption Method[J].Chinese Journal of Chemical Engineering,2010,18(5):843-847. |
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| Authors: | LIU Min WANG Jinhai WANG Shubo XIE Xiaofeng ZHOU Tao V KMathur |
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| Affiliation: | College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China;Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China |
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| Abstract: | Electrochemical impedance spectroscopy (EIS) is widely used in fuel cell impedance analysis. However, for ohmic resistance (RΩ), EIS has some disadvantages such as long test period and complex data analysis with equivalent circuits. Therefore, the current interruption method is explored to measure the value of RΩ in direct methanol fuel cells (DMFC) at different temperatures and current densities. It is found that RΩ decreases as temperature increase, and decreases initially and then increases as current density increases. These results are consistent with those measured by the EIS technique. In most cases, the ohmic resistances with current interruption (RiR) are larger than those with EIS (REIS), but the difference is small, in the range from-0.848% to 5.337%. The errors of RiR at high current densities are less than those of REIS. Our results show that the RiR data are reliable and easy to obtain in the measurement of ohmic resistance in DMFC. |
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| Keywords: | direct methanol fuel cell (DMFC) ohmic resistance current interruption method electrochemical impedance spectroscopy (EIS) membrane resistance |
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