South Korea's successful development of copper sulphide anode sodium ion batteries is expected to reduce the overall battery production cost

Lithium-ion batteries are the mainstream of energy storage technology today and have been widely used in various 3C products and electric vehicles. However, the content of lithium metal covers only 0.06 % of the shell, and in recent years, the demand has greatly increased, resulting in an increase in the price of raw materials, plus safety. The nature of human criticism, Therefore, in addition to improving battery performance and reducing costs, there are also teams looking for batteries other than lithium.

Among them, the sodium ion battery(SIB) is a rising star. Since sodium and lithium metal are both base metals, the physicochemical values are similar. Lithium-ion battery technology and material parts can be used for sodium batteries, but sodium ion batteries have capacity and anode cycle stability. problem, There is still great room for growth. Recently, the Korea Institute of Science and Technology(KAIST) has successfully developed copper sulfide anode sodium ion batteries, which is expected to further reduce the overall battery production costs and increase capacity, and allow sodium ion batteries to move toward commercialization.

Jung Minyuk and Jeong YongLee of the KAIST Institute of Materials Science and Engineering jointly developed an anode material suitable for sodium ion batteries. In the research tests, copper sulfide anode was 1.5 times more recyclable than the old material Gaochu, and the manufacturing cost is expected to be reduced. 40 %.

The research team has been working on the search for anode materials with high conductivity and high theoretical capacity, and selected nanoplates of copper sulfide. The team believes that this compound is easily alloyed with sodium, so it is expected to increase the battery capacity. And elongated circulation.

The research analysis also pointed out that after adjusting copper sulfide through crystallography, there is room for sodium input reaction(Ion). The test results show that compared with lithium ions in graphite, The sodium metal ion implantation capability of copper sulfide is 1.5 times that of Gaoyue, and it can also maintain an initial capacity of 90 % after 250 charge and discharge cycles.

And the biggest advantage of sodium ion batteries is that the crust content is as high as 2.6 %, and the content is ranked sixth. The development of sodium ion batteries helps to reduce the overall battery cost, especially for 3C products. The battery cost accounts for 30 % of the total.

Yuk pointed out that in recent years, South Korea has experienced air quality problems and people have shown great interest in renewable energy-related products. Therefore, the study can be used to allow South Korea to take the lead in energy products. The study has now been published in NatureCommunications.

The page contains the contents of the machine translation.