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China Achieves Breakthrough in Battery Technology with Rechargeable Ca-O2 Batteries

Chinese scientists have developed a rechargeable calcium-oxygen (Ca-O2) battery that can last for 700 cycles at room temperature. The battery utilizes calcium as the anode and a carbon nanotube (CNT) sheet as the air cathode.

The team discovered an ionic liquid-based electrolyte that enables reversible ion movement, allowing for both charging and discharging.

Chinese scientists have made a significant breakthrough in battery technology by developing a rechargeable calcium-oxygen (Ca-O2) battery that can last for 700 cycles at room temperature, according to an article published in Nature. This innovative power source utilizes calcium as the anode and a carbon nanotube (CNT) sheet as the air cathode, with a calcium-based solution serving as the electrolyte.


The development of the calcium-oxygen battery is a major milestone due to its ability to store and release energy through chemical reactions involving metallic calcium, oxygen, and the electrolyte. Calcium is a widely available and cost-effective material, making it an ideal choice for battery technology. Moreover, batteries based on metallic calcium have the highest theoretical energy density among all battery types, offering the potential for high energy storage.

One of the challenges with this type of battery is its poor electrochemical reversibility at room temperature. In other words, scientists need to identify suitable electrolytes that can operate effectively at room temperature and manage the discharge products for practical implementation.


The Chinese research team has addressed this issue by discovering an ionic liquid-based electrolyte that enables reversible ion movement, allowing for both charging and discharging, while also improving the battery's kinetics. This breakthrough electrolyte has made it possible to recharge the battery at room temperature with impressive performance, as it has been successfully charged and discharged over 700 times in prototype tests.


In addition to its technical advancements, the team has also demonstrated that the Ca-O2 batteries are flexible and can be integrated into the growing wearable tech industry. This opens up new possibilities for the use of these batteries in various applications, including wearable devices and other portable electronics.

 
  • Chinese scientists have developed a rechargeable calcium-oxygen (Ca-O2) battery that can last for 700 cycles at room temperature.

  • The battery utilizes calcium as the anode and a carbon nanotube (CNT) sheet as the air cathode.

  • The team discovered an ionic liquid-based electrolyte that enables reversible ion movement, allowing for both charging and discharging.


Source: CGTN

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