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release time:2024-03-26 Hits: Popular:AG11 battery
Singapore develops 18650 2200mah battery cathode specific capacity increased by 48%
The emergence of new cathode manufacturing processes is expected to accelerate the commercialization of lithium-sulfur batteries.
Foreign media reported that scientists from the Nanobiology Laboratory of the Singapore Agency for Science, Technology and Research have developed a new method of manufacturing lithium-sulfur cathodes that can improve the stability of battery charge and discharge cycles, thereby accelerating the commercialization of lithium-sulfur batteries.
Lithium-sulfur batteries can theoretically store 10 times more energy than lithium-ion batteries. They have outstanding advantages such as high energy density, low cost, and green environmental protection. However, they are not resistant to high temperatures and will accelerate battery capacity decline in high temperature environments.
To solve this problem, Singaporean scientists developed a new cathode manufacturing process that focuses on improving the cathode design and using nanomaterial engineering to optimize the anode, separator and electrolyte.
The lab team used an assembled carbon scaffold to create a three-dimensional interconnected porous nanomaterial before adding sulfur, and the scaffold prevented the cathode from collapsing.
Research results show that the new cathode can reach a specific capacity of 1220mAh/g in 200 cycles, and the capacity decay rate is less than 0.14%.
According to laboratory data, the specific capacity of the 18650 2200mah battery cathode is increased by 48% and the capacity fading rate is reduced by 26% compared with conventionally prepared sulfur cathodes due to "differences in the shape, surface area and resistance of the cathode."
A professor from the research team said: "The preparation technology of sulfur cathodes has a great impact on the electrochemical performance of lithium-sulfur batteries. Our method is industrially scalable, and it is expected that it will have an important impact on the design of future practical lithium-sulfur batteries." Significant impact."
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