High-capacity, reversible hydrogen storage using H–-conducting solid electrolytes

IF 45.8 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2025-09-18 DOI:10.1126/science.adw1996

Takashi Hirose, Naoki Matsui, Takashi Itoh, Yoyo Hinuma, Kazutaka Ikeda, Kazuma Gotoh, Guangzhong Jiang, Kota Suzuki, Masaaki Hirayama, Ryoji Kanno

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引用次数: 0

Abstract

Hydrogen absorption and desorption in solids are pivotal reactions involved in batteries and hydrogen storage devices. However, conventional thermodynamic and electrochemical hydrogen storage using high-capacity materials suffers from high hydrogen-desorption temperatures and instability of electrolytes. In this work, we explored electrochemical hydride ion (H^–)–driven hydrogen storage and developed a solid electrolyte, anti–α-AgI–type Ba_0.5Ca_0.35Na_0.15H_1.85, which exhibits excellent H^– conductivity and electrochemical stability. This electrolyte is compatible with several metal-hydrogen electrodes, such as titanim hydride and magnesium hydride (MgH₂), allowing for high-capacity, reversible hydrogen storage at low temperatures. Specifically, Mg–H₂ cells operating as hydrogen storage devices (Mg + H₂

⇄

MgH₂) achieved a reversible capacity of 2030 milliampere hours per gram at 90°C, offering safe and efficient hydrogen-electricity conversion and hydrogen storage devices.

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使用氢导电固体电解质的高容量、可逆储氢。

固体中氢的吸附和解吸是电池和储氢装置中涉及的关键反应。然而，传统的使用大容量材料的热力学和电化学储氢技术存在着脱氢温度高和电解质不稳定的问题。在本工作中，我们探索了氢化物离子（H-）驱动的电化学储氢，开发了一种具有优异H-导电性和电化学稳定性的固体电解质：抗α- agi型Ba0.5Ca0.35Na0.15H1.85。这种电解质与几种金属氢电极兼容，如氢化钛和氢化镁（MgH2），允许在低温下进行高容量、可逆的氢储存。具体来说，Mg-H2电池作为储氢装置（Mg + H2[公式：见文本]MgH2）在90°C下实现了每克2030毫安小时的可逆容量，提供了安全高效的氢-电转换和储氢装置。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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