氢负离子（H-）电化学因其载流子质量轻、理论能量密度高的特点，为下一代储能提供了极具前景的技术路径。然而，可充式氢负离子电池的发展长期受限于两大瓶颈：一是缺乏能够实现H-可逆嵌入/脱嵌的合适电极材料，二是全固态电池构型中存在严峻的界面挑战。稀土氢化物（特别是CeH2）展现出卓越的氢负离子-电子双传导特性。该材料的稳定) electrochemistry offers a promising route for next-generation energy storage due to the low mass and high theoretical energy density of H carriers. However, the development of rechargeable hydride-ion batteries has been impeded by the lack of suitable electrode materials capable of reversible H insertion/extraction and by severe interfacial challenges in all-solid-state configurations. Rare-earth hydrides, particularly CeH, exhibit remarkable dual hydride-ion and electron conductivity. The stable −−−3Fm3¯m晶格结构使其在氢化/脱氢过程中体积变化最小化，例如从CeH到CeH的体积变化约为1%。这些本征特性使CeH和CeH成为全固态氢负离子电池的潜在电极材料。利用最新开发的氢负离子导体CeH@BaH作为电解质，我们构建了CeH|CeH@BaH|CeH电池，其初始放电容量为79.5 mA h g并保持40 mA h g在室温下循环175次后，研究还组装了电压达到~0.7V的串联堆叠结构电池%%以及面容量超过13 mA h cm^-2的厚电极电池，展现出优异的结构稳定性和应用潜力。本工作凸显了稀土氢化物在先进储能领域的巨大潜力。