A viable hydrogen economy has thus far been hampered by the lack of an inexpensive and convenient hydrogen storage solution meeting all requirements, especially in the areas of long hauls and delivery infrastructure. Current approaches require high pressure and/or complex heat management systems to achieve acceptable storage densities. Herein we present a manganese hydride molecular sieve that can be readily synthesized from inexpensive precursors and demonstrates a reversible excess adsorption performance of 10.5 wt% and 197 kgH₂ m⁻³ at 120 bar at ambient temperature with no loss of activity after 54 cycles. Inelastic neutron scattering and computational studies confirm Kubas binding as the principal mechanism. The thermodynamically neutral adsorption process allows for a simple system without the need for heat management using moderate pressure as a toggle. A storage material with these properties will allow the DOE system targets for storage and delivery to be achieved, providing a practical alternative to incumbents such as 700 bar systems, which generally provide volumetric storage values of 40 kgH₂ m⁻³ or less, while retaining advantages over batteries such as fill time and energy density. Reasonable estimates for production costs and loss of performance due to system implementation project total energy storage costs roughly 5 times cheaper than those for 700 bar tanks, potentially opening doors for increased adoption of hydrogen as an energy vector.

中文翻译：

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氢化锰分子筛，用于在环境条件下实际储氢†

迄今为止，由于缺乏一种廉价且方便的氢存储解决方案，无法满足所有需求，尤其是在长途运输和运输基础设施领域，氢经济的发展一直受到阻碍。当前的方法需要高压和/或复杂的热管理系统以实现可接受的存储密度。本文中，我们介绍了一种氢化锰分子筛，该分子筛可以很容易地由廉价的前体合成，并显示出10.5 wt％和197 kgH ₂ m ^-3的可逆过量吸附性能。在环境温度为120 bar的条件下，经过54个循环后仍未失去活性。非弹性中子散射和计算研究证实，Kubas结合是主要机理。热力学中性吸附过程可实现简单的系统，而无需使用中等压力作为触发进行热管理。具有这些特性的存储材料将使DOE系统的存储和交付目标得以实现，从而为现有设备（例如700 bar系统）提供实用的替代方案，后者通常可提供40 kgH ₂ m ^-3的体积存储值或更少，同时保留了优于电池的优势，例如填充时间和能量密度。由于系统实施项目而导致的生产成本和性能损失的合理估算，其总储能成本比700 bar储气罐便宜约5倍，这有可能为增加采用氢作为能量载体打开大门。