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Catalyzed LiBH4 Hydrogen Storage System with In Situ Introduced Li3BO3 and V for Enhanced Dehydrogenation and Hydrogenation Kinetics as Well as High Cycling Stability
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2022-01-12 , DOI: 10.1021/acsaem.1c03608 Zhenglong Li 1, 2 , Shun Wang 2 , Mingxia Gao 2 , Kaicheng Xian 2 , Yi Shen 2 , Yaxiong Yang 1 , Panyu Gao 3 , Wenping Sun 2 , Yongfeng Liu 2 , Hongge Pan 1, 2
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2022-01-12 , DOI: 10.1021/acsaem.1c03608 Zhenglong Li 1, 2 , Shun Wang 2 , Mingxia Gao 2 , Kaicheng Xian 2 , Yi Shen 2 , Yaxiong Yang 1 , Panyu Gao 3 , Wenping Sun 2 , Yongfeng Liu 2 , Hongge Pan 1, 2
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LiBH4 as a promising candidate material for solid-state hydrogen storage still suffers from high dehydrogenation temperature and poor reversibility. A catalyzed LiBH4-based system with in situ introduced Li3BO3 and V is synthesized by adding NH4VO3 into LiBH4 followed by a heat treatment and a hydrogenation process. The optimized LiBH4 system introduced with 0.06 molar fraction of Li3BO3 + V, which is denoted as LiBH4–0.06LiBOV, shows excellent hydrogen storage kinetics and high reversible stability. The system starts to release hydrogen at 220 °C, and a capacity of 5.8 wt % H2 is obtained at 350 °C within 90 min. Furthermore, full rehydrogenation can be achieved at 500 °C and 50 bar of H2 for 50 min, and a capacity retention as high as 87.5% is obtained after five cycles. In situ introduced Li3BO3 and V lower the activation energy of LiBH4 and inhibit the generation of Li2B12H12 during the hydrogenation of LiBH4, which contribute to the synergistic catalytic effects on hydrogen desorption and absorption. In addition, the restraining of the particle size growth during dehydrogenation/hydrogenation is critical to inhibiting the generation of Li2B12H12 and thus improves the hydrogenation property of LiBH4. The catalyzed LiBH4 system provides new insights on LiBH4 as a high-density hydrogen storage material.
中文翻译：
原位引入 Li3BO3 和 V 的催化 LiBH4 储氢系统用于增强脱氢和加氢动力学以及高循环稳定性
LiBH 4作为一种很有前景的固态储氢候选材料，仍然存在脱氢温度高、可逆性差等问题。通过将NH 4 VO 3添加到LiBH 4中，然后进行热处理和氢化过程，合成了原位引入Li 3 BO 3和V的催化LiBH 4基体系。优化后的LiBH 4体系引入了0.06摩尔分数的Li 3 BO 3 + V，记为LiBH 4–0.06LiBOV，表现出优异的储氢动力学和高可逆稳定性。系统在 220 ℃开始释放氢气，在 350 ℃ 90 分钟内获得5.8 wt % H 2的容量。此外，在500 ℃和50 bar H 2下50 min可实现完全再氢化，5次循环后容量保持率高达87.5%。原位引入Li 3 BO 3和V降低了LiBH 4的活化能，抑制了LiBH 4加氢过程中Li 2 B 12 H 12的生成，这有助于对氢解吸和吸收的协同催化作用。此外，抑制脱氢/加氢过程中的粒径增长对于抑制Li 2 B 12 H 12的生成从而提高LiBH 4的加氢性能至关重要。催化的 LiBH 4系统为 LiBH 4作为高密度储氢材料提供了新的见解。
更新日期：2022-01-24
中文翻译：
原位引入 Li3BO3 和 V 的催化 LiBH4 储氢系统用于增强脱氢和加氢动力学以及高循环稳定性
LiBH 4作为一种很有前景的固态储氢候选材料，仍然存在脱氢温度高、可逆性差等问题。通过将NH 4 VO 3添加到LiBH 4中，然后进行热处理和氢化过程，合成了原位引入Li 3 BO 3和V的催化LiBH 4基体系。优化后的LiBH 4体系引入了0.06摩尔分数的Li 3 BO 3 + V，记为LiBH 4–0.06LiBOV，表现出优异的储氢动力学和高可逆稳定性。系统在 220 ℃开始释放氢气，在 350 ℃ 90 分钟内获得5.8 wt % H 2的容量。此外，在500 ℃和50 bar H 2下50 min可实现完全再氢化，5次循环后容量保持率高达87.5%。原位引入Li 3 BO 3和V降低了LiBH 4的活化能，抑制了LiBH 4加氢过程中Li 2 B 12 H 12的生成，这有助于对氢解吸和吸收的协同催化作用。此外，抑制脱氢/加氢过程中的粒径增长对于抑制Li 2 B 12 H 12的生成从而提高LiBH 4的加氢性能至关重要。催化的 LiBH 4系统为 LiBH 4作为高密度储氢材料提供了新的见解。
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