April 28 (Sunday) "Nature" website (www.nature.com) news:
South Korean scientists have developed sodium-ion batteries that can be charged in seconds
Sodium is more than 500 times more abundant on Earth than lithium. Nonetheless, existing sodium-ion batteries face fundamental limitations, including lower power output, limited storage performance, and long charging times, prompting scientists to develop a new generation of energy storage materials.
Recently, a research team at the Korea Advanced Institute of Science and Technology (KAIST) announced that they have developed a high-energy, high-power hybrid sodium-ion battery capable of fast charging.
This innovative sodium-ion hybrid energy storage system combines an anode material typically used for batteries and a cathode suitable for supercapacitors, enabling the device to achieve high storage capacity and fast charge-discharge rates, promising to be an effective alternative to lithium-ion batteries.
However, in order to develop hybrid batteries with high energy and high power density, it is necessary to solve the problems of slow energy storage rate of battery-type anodes and relatively low capacity of supercapacitor-type cathode materials.
To address these issues, the research team used two different metal-organic frameworks to optimize the manufacturing process of hybrid cells. By embedding fine active materials in metal-organic framework-derived porous carbon, they developed anode materials with improved kinetic properties.
In addition, the research team synthesized a high-capacity cathode material and developed a sodium ion storage system by optimizing the combination of cathode and anode materials to balance and minimize the difference in energy storage rate between electrodes.
Source | NetEase Technology Channel
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