Nanoporous polymer-based composites for enhanced hydrogen storage
Nanoporous polymer-based composites for enhanced hydrogen storage
复制标题
DOI：
10.1007/s10450-019-00065-x
复制
发表时间：
2019-05-01
影响因子：
3.3
通讯作者：
Mays, Timothy J.
中科院分区：
文献类型：
--
作者：
Tian, Mi;Rochat, Sebastien;Mays, Timothy J.
具有可加工性和增强的储氢能力的新型复合材料的探索和评价对于车载储氢系统和基于燃料电池的电动汽车开发具有重要意义。在这里，我们证明了制造的复合膜具有足够的机械性能，增强储氢的基础上的聚合物的固有微孔性（PIM-1）矩阵含有纳米尺寸的填料：活性炭（AX 21）或金属有机框架（MIL-101）。这是第一次比较研究不同的复合材料系统的储氢，此外，第一次详细评估氢在聚合物基纳米多孔复合材料的扩散动力学。复合膜的特征在于通过表面积和孔隙率分析，氢吸附测量，机械测试和气体吸附建模。具有60重量%AX 21的PIM-1/AX 21复合材料提供增强的氢吸附动力学和在77 K下高达9.35重量%的总储氢容量;这上级于美国能源部的储氢目标。拉伸试验表明，PIM-1/AX 21的极限应力和应变高于含MIL-101或PAF-1的复合材料，并且足以用于储氢罐。所提出的数据提供了新的见解的聚合物基复合膜的设计和表征方法。我们的纳米多孔聚合物基复合材料在安全性、处理和实际制造方面优于粉末，具有储氢应用的潜力，可以作为增加储存或降低高压储氢罐中操作压力的手段。
The exploration and evaluation of new composites possessing both processability and enhanced hydrogen storage capacity are of significant interest for onboard hydrogen storage systems and fuel cell based electric vehicle development. Here we demonstrate the fabrication of composite membranes with sufficient mechanical properties for enhanced hydrogen storage that are based on a polymer of intrinsic microporosity (PIM-1) matrix containing nano-sized fillers: activated carbon (AX21) or metal-organic framework (MIL-101). This is one of the first comparative studies of different composite systems for hydrogen storage and, in addition, the first detailed evaluation of the diffusion kinetics of hydrogen in polymer-based nanoporous composites. The composite films were characterised by surface area and porosity analysis, hydrogen adsorption measurements, mechanical testing and gas adsorption modelling. The PIM-1/AX21 composite with 60 wt% AX21 provides enhanced hydrogen adsorption kinetics and a total hydrogen storage capacity of up to 9.35 wt% at 77 K; this is superior to the US Department of Energy hydrogen storage target. Tensile testing indicates that the ultimate stress and strain of PIM-1/AX21 are higher than those of the MIL-101 or PAF-1 containing composites, and are sufficient for use in hydrogen storage tanks. The data presented provides new insights into both the design and characterisation methods of polymer-based composite membranes. Our nanoporous polymer-based composites offer advantages over powders in terms of safety, handling and practical manufacturing, with potential for hydrogen storage applications either as means of increasing storage or decreasing operating pressures in high-pressure hydrogen storage tanks.