Ion Conducting Membranes for Fuel Cells and other Electrochemical Devices
Ion Conducting Membranes for Fuel Cells and other Electrochemical Devices
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DOI：
10.1021/cm402742u
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发表时间：
2014-01-14
影响因子：
8.6
通讯作者：
Kreuer, Klaus-Dieter
中科院分区：
文献类型：
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作者：
Kreuer, Klaus-Dieter
从基本的观点出发，对燃料电池质子和氢氧离子传导隔膜的传输和稳定性问题进行了批判性的讨论。从分子尺度到器件水平的结构和动力学考虑同样意味着这类材料密切相关的聚合物化学和电化学方面。离子/溶剂，残留离子/离子，和溶剂/聚合物的离子电荷载体和选择性离子运输的形成和流动性的相互作用，甚至作为纳米级有序的驱动力的重要性被强调，它表明，除了简单的静电，必须考虑特定的化学相互作用。在此基础上，提出了改进现有膜类型和开发新膜类型的建议，不仅适用于燃料电池，而且适用于其他电化学能量转换和储存装置，如氧化还原流和碱性离子电池。
Transport and stability issues of proton and hydroxide ion conducting separator membranes for fuel cells are critically discussed from a fundamental point of view. Considerations of structure and dynamics on the molecular scale to the device level equally imply polymer-chemical and electrochemical aspects which are closely related for this class of materials. The importance of ion/solvent, residual ion/ion, and solvent/polymer interactions for the formation and mobility of ionic charge carriers and selective ionic transport and even as driving forces for nanoscale ordering is emphasized, and it is shown that, apart from simple electrostatics, specific chemical interactions must be considered. On the basis of this understanding, suggestions are being made for the modification of existing and the development of new membrane types, not only for fuel cells but also for other electrochemical energy conversion and storage devices such as redox-flow and alkaline ion batteries.