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

Jirong Cui, Ren Zou, Weijin Zhang (), Hong Wen, Jinyao Liu, Shangshang Wang, Shukun Liu, Hetong Chen, Wei Liu, Xiaohua Ju, Weiwei Wang, Tao Gan, Jiong Li, Jianping Guo, Teng He, Hujun Cao () and Ping Chen ()
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Jirong Cui: Chinese Academy of Sciences
Ren Zou: Chinese Academy of Sciences
Weijin Zhang: Chinese Academy of Sciences
Hong Wen: Chinese Academy of Sciences
Jinyao Liu: Jilin University
Shangshang Wang: Chinese Academy of Sciences
Shukun Liu: Chinese Academy of Sciences
Hetong Chen: Chinese Academy of Sciences
Wei Liu: Chinese Academy of Sciences
Xiaohua Ju: Chinese Academy of Sciences
Weiwei Wang: Chinese Academy of Sciences
Tao Gan: Chinese Academy of Sciences
Jiong Li: Chinese Academy of Sciences
Jianping Guo: Chinese Academy of Sciences
Teng He: Chinese Academy of Sciences
Hujun Cao: Chinese Academy of Sciences
Ping Chen: Chinese Academy of Sciences

Nature, 2025, vol. 646, issue 8084, 338-342

Abstract: Abstract 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 °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.

Date: 2025
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DOI: 10.1038/s41586-025-09561-3

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