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首页> 外文会议>AIChE Annual Meeting >Materials with Hierarchical Porosity for Energy Storage and Conversion
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Materials with Hierarchical Porosity for Energy Storage and Conversion

机译：具有分层孔隙率的材料，用于储能和转换

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Materials containing pores in size ranges from micropores to macropores offer interesting features for a number applications involving energy storage and conversion, such as batteries, fuel cells, hydrogen storage, and sunlight-to-fuel conversion. Depending on the specific application, they can provide large surface areas for reaction, interfacial transport, or dispersion of active sites; they can provide nanostructured features which enhance reactivity, alter materials properties, or shorten diffusion paths; they can act as host materials to stabilize other active components; or, in the case of porous carbons, they can provide electrically conductive phases as well as intercalation sites. However, the higher reactivity brought about by nanostructured features can also lead to decreased stability, particularly in applications where phase changes may alter the structure of the material or where high temperatures are employed. This talk will focus on two redox systems (lithium-ion batteries and sunlight-to-fuel conversion), in which templated porous materials provide a platform for either electrical energy storage or light-to-chemical energy conversion. In the first system the role of pore architecture in carbon-based electrodes will be discussed. In the second system, we investigate the role of porosity in ceria-based materials of interest for solar thermal splitting of water or carbon dioxide to produce hydrogen or carbon monoxide fuels, respectively.
机译：含有尺寸的孔的材料范围从微孔到宏观，为涉及能量存储和转换的数字应用提供有趣的功能，例如电池，燃料电池，储氢和阳光到燃料转换。根据具体应用，它们可以为活性位点的反应，界面传输或分散提供大的表面积;它们可以提供纳米结构的特征，增强反应性，改变材料特性或缩短扩散路径;它们可以充当主体材料以稳定其他有源组件;或者，在多孔碳的情况下，它们可以提供导电阶段以及插层。然而，通过纳米结构特征引起的较高的反应性也可以导致稳定性降低，特别是在相变可能改变材料结构或使用高温的应用中，稳定性降低，特别是在应用中。该谈话将专注于两个氧化还原系统（锂离子电池和阳光到燃料转换），其中模板多孔材料为电能存储或光到化学能量转换提供平台。在第一系统中，讨论孔架构在碳基电极中的作用。在第二个系统中，我们研究了孔隙率在基于二氧化铈的利益材料中的作用，用于水或二氧化碳的太阳能热分裂，分别产生氢气或一氧化碳燃料。

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