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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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Updated: Jan 17, 2026

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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A room temperature rechargeable all-solid-state hydride ion battery.

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  • 1Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, People's Republic of China.

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Researchers developed a novel hydride material for fast hydride ion conduction, enabling an all-solid-state rechargeable battery. This innovation offers a new pathway for clean energy storage by utilizing hydrogen ions.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Hydride ions (H-) are highly energetic, polarizable, and reactive negative charge carriers.
  • H- -mediated electrochemical processes offer unique advantages over traditional systems.
  • Development of innovative electrochemical devices like batteries and fuel cells is crucial for energy solutions.

Purpose of the Study:

  • To develop a novel hydride material for efficient hydride ion conduction.
  • To construct and evaluate an all-solid-state rechargeable battery utilizing hydride ions.
  • To explore new avenues for clean energy storage and conversion.

Main Methods:

  • Synthesis of a core-shell hydride: 3CeH3@BaH2.
  • Characterization of hydride ion conduction properties.
  • Fabrication and testing of an all-solid-state rechargeable H- battery (CeH2|3CeH3@BaH2|NaAlH4).

Main Results:

  • The 3CeH3@BaH2 hydride exhibits fast H- conduction at ambient temperature and becomes a superionic conductor above 60°C.
  • An all-solid-state rechargeable H- battery was successfully constructed and operated at ambient conditions.
  • The battery demonstrated an initial specific capacity of 984 mAh g-1, retaining 402 mAh g-1 after 20 cycles.

Conclusions:

  • The developed core-shell hydride enables efficient hydride ion conduction for advanced electrochemical devices.
  • This work presents a promising all-solid-state rechargeable battery technology using hydrogen ions as charge carriers.
  • Utilizing hydrogen ions can potentially avoid detrimental metal dendrite formation, paving the way for safer energy storage.