A room temperature rechargeable all-solid-state hydride ion battery

• 成果类型: Article
• 署名作者: Cui, Jirong; Zou, Ren; Zhang, Weijin; Wen, Hong; Liu, Jinyao; Wang, Shangshang; Liu, Shukun; Chen, Hetong; Liu, Wei; Ju, Xiaohua; Wang, Weiwei; Gan, Tao; Li, Jiong; Guo, Jianping; He, Teng; Cao, Hujun; Chen, Ping
• 署名单位: Chinese Academy of Sciences; Dalian Institute of Chemical Physics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Jilin University; Chinese Academy of Sciences; Shanghai Advanced Research Institute, CAS; Chinese Academy of Sciences
• 刊物名称: NATURE
• ISSN/ISSBN: 0028-0836; 1476-4687
• DOI: 10.1038/s41586-025-09561-3
• 发表日期: 2025-10-09
• 关键词: total-energy calculations; hydrogen; storage; SPECTRA; metals; cerium

摘要

As a negative charge carrier, the hydride ion (H-) is more energetic, polarizable and reactive than cations1. An H--mediated electrochemical process is fundamentally different from existing systems and enables the development of innovative electrochemical devices, such as rechargeable batteries, fuel cells, electrolysis cells and gas separation membranes2. Here we developed a core-shell hydride 3CeH3@BaH2, which exhibits fast H- conduction at ambient temperature and becomes a superionic conductor above 60 degrees C. This hydride allows us to construct an all-solid-state rechargeable H- battery CeH2|3CeH3@BaH2|NaAlH4, which operates at ambient conditions using NaAlH4 and CeH2 as cathode and anode materials, respectively. This battery has an initial specific capacity of 984 mAh g-1 and retains 402 mAh g-1 after 20 cycles. Using hydrogen as charge carriers can avoid the formation of detrimental metal dendrites, in principle, which creates new research avenues for clean energy storage and conversion.