A sodium-ion battery that can be charged in just a few seconds has been developed
Researchers at the Korea Advanced Institute of Science and Technology (KAIST) have developed a sodium-ion battery that can be charged in just a few seconds, providing greater insight into the use of sodium, which is more readily available than lithium, in rechargeable batteries.
Low-crystallinity conductive multivalence iron sulfide-embedded S-doped anode and high-surface area O-doped cathode of 3D porous N-rich graphitic carbon frameworks for high-performance sodium-ion hybrid energy storages - ScienceDirect
KAIST NEWS CENTER
KAIST develops sodium battery capable of rapi | EurekAlert!
https://www.eurekalert.org/news-releases/1041843
Researchers developed sodium battery capable of rapid charging in just a few seconds
https://techxplore.com/news/2024-04-sodium-battery-capable-rapid-seconds.html
Sodium is said to be nearly 1,000 times more abundant than lithium, so research is underway around the world to use it as an alternative energy storage means to lithium-ion batteries.
Existing sodium-ion batteries are broadly divided into sodium-ion batteries (SIBs) and sodium-ion capacitors (SICs). SIBs have a slow redox reaction rate and a relatively high energy density, but they have the disadvantage of low power density and poor rechargeability, while SICs have a high power density but an extremely low energy density. Therefore, it seems that it is not possible to obtain both high energy density and power density that allows for rapid charging by using only SIBs or SICs.
It is expected that these problems can be improved by combining the advantages of SIB and SIC, called sodium-ion hybrid rechargeable batteries (SIHES). SIHES can simultaneously achieve high energy density and rapid charging output density, but the challenge is how to select the materials.
A research team led by Professor Jeung Ku Kang of KAIST's Department of Materials Science and Engineering has developed new anode and cathode materials, which allows for fast charging while maintaining high energy density.
According to Professor Kang, the material used has the advantage of stabilizing the charge/discharge cycle while increasing the reaction speed. KAIST, which announced the research, said, 'Fast charging is possible in just a few seconds.'
The newly developed SIHES achieved an energy density of 247Wh/kg and a power density of 34,748W/kg, exceeding the energy density of commercially available lithium-ion batteries.
Professor Kang described the battery as 'a breakthrough that overcomes the limitations of current charging systems,' and said it could have a wide range of applications, from electric vehicles to smart electronics and aerospace technology.
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in Science, Posted by log1p_kr