Quasi-2D liquid cell for high density hydrogen storage
Quasi-2D liquid cell for high density hydrogen storage
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DOI：
10.1016/j.nanoen.2016.11.017
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发表时间：
2017
期刊：
影响因子：
17.6
通讯作者：
Shih-Yi Liu;P. Kundu;T. Huang;Y. Chuang;F. Tseng;Yue Lu;Manling Sui;Fu-Rong Chen
中科院分区：
文献类型：
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作者：
Shih-Yi Liu;P. Kundu;T. Huang;Y. Chuang;F. Tseng;Yue Lu;Manling Sui;Fu-Rong Chen
氢已被认为是未来的能源载体，可以允许从基于化石燃料的经济逐渐转变为氢经济。实现氢经济的主要障碍之一是氢的有效储存。到目前为止，还没有提出的存储方法完全满足所有能源部（DOE）的目标标准，其中重量容量为约5.5wt%，氢存储的损失率为0.1（g/h）/kg。在这里，我们证明了高达~3.4± 0.18wt%的高密度氢纳米气泡（HNB）可以通过电子辐解辅助提取反应（RAAR）在含有有机分子的封装准二维水储层中有效地产生和存储。RAAR是辐解水物种与有机分子表面基团之间的反应。在我们的系统中，HNB的长期稳定性来自于由电子剂量率和有机分子浓度控制的氢分子的过饱和。在我们的实验中，在25 °C和1巴下，最佳重量容量和损失速率分别为约3.4±0.18重量%和0.18（g/h）/kg，这接近DOE目标。TEM装备有具有准2D水储存器的连续流保持器，用于原位生成和存储HNB。用于HNB形成的再生时间大约为几十秒。该过程可以与微生物电解池技术相结合，该技术从含有丰富有机物的废水中转化氢气。
Hydrogen has been recognized as a future energy carrier that may allow a gradual transformation from a fossil fuel-based economy to a hydrogen economy. One of main obstacles to implement hydrogen economy is efficient storage of hydrogen. Up to present, none of proposed storage methods completely satisfy all department of energy (DOE) target criteria with gravimetric capacity ~5.5 wt% and loss rate 0.1 (g/h)/kg for hydrogen storage yet. Here we demonstrate high density of hydrogen nano-bubble (HNB) up to ~3.4±0.18 wt% can be efficiently generated and stored via an electron radiolysis assisted abstraction reaction (RAAR) in an encapsulated quasi-2D water reservoir containing organic molecules. The RAAR is a reaction between radiolytic water species and the surface groups of organic molecules. In our system, the long term stability of HNB comes from supersaturation of hydrogen molecules controllable by the electron dose rate and concentration of the organic molecule. The best gravimetric capacity and loss rate in our experiment are ~3.4±0.18 wt% and 0.18(g/h)/kg, respectively, in 25 °C and at 1 bar which fall closely to the DOE targets. A TEM equipped with a continuous flow holder with a quasi-2D water reservoir is utilized for in-situ generation and storage of HNB. The regeneration time for HNB formation is in the order of a few ten seconds. This process can be linked with the microbial electrolysis cell technology that converts hydrogen from wastewater containing abundant organics.