Scientists introduce initial model of a hydride-ion battery
In a significant breakthrough for clean energy storage and conversion, a group led by Prof. CHEN Ping from the Dalian Institute of Chemical Physics (DICP) of the Chinese Academy of Sciences (CAS) has constructed the first rechargeable hydrogen-ion prototype. The team's findings were published in the prestigious journal Nature.
The hydrogen-ion battery, a rechargeable battery that uses hydrogen ions as charge carriers, has long been a promising candidate for next-generation electrochemical devices. However, the practical application of hydrogen ions has been hindered due to the lack of efficient electrolytes with fast hydrogen ion conductivity, thermal stability, and electrode compatibility.
To address this challenge, the researchers developed a novel core-shell composite hydride. This innovative design, inspired by heterojunctions, features a thin layer of encapsulation, enabling fast hydrogen ion conduction at room temperature and high thermal and electrochemical stability.
The hydrogen-ion battery prototype was built using this newly developed hydrogen ion electrolyte. Tungsten trioxide (WO3) was used as the active cathode component in the construction of the battery. The positive electrode delivered an initial discharge capacity of 984 mAh/g at room temperature and retained 402 mAh/g after 20 cycles, demonstrating the potential for efficient and sustainable energy storage.
In a stacked configuration, the operating voltage of the hydrogen-ion battery reached 1.9 V and powered a yellow light-emitting diode lamp, further showcasing its practical applications. The study's lead author, Yan Sun, who worked on the development of the first prototype of a hydrogen-ion battery at the DICP, CAS, expressed optimism about the technology's future.
The use of hydrogen as the charge carrier in this technology avoids dendrite formation, a common issue in lithium-ion batteries, promoting safe and efficient energy storage. Hydrogen-ion batteries hold immense potential for the storage and conversion of clean energy due to the tunable properties of hydrogen-based materials.
This groundbreaking research marks a significant step forward in the development of clean, efficient, and sustainable energy storage solutions. The first rechargeable hydrogen-ion prototype, built based on a hydrogen-ion electrolyte developed in the study, promises to revolutionise the field of electrochemical energy storage.
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