South Korea successfully developed copper sulfide anode sodium ion battery

　　Expected to reduce overall battery production costs

　　Lithium-ion batteries are the mainstream of today’s energy storage technology and have been widely used in various 3C products and electric vehicles. However, the content of lithium metal only accounts for 0.06% of the earth’s crust. The nature is criticized, so in addition to improving battery performance and reducing costs, there are also teams seeking batteries other than lithium-based.

　　Lithium-ion batteries are the mainstream of today’s energy storage technology and have been widely used in various 3C products and electric vehicles. However, the content of lithium metal only accounts for 0.06% of the earth’s crust. The nature is criticized, so in addition to improving battery performance and reducing costs, there are also teams seeking batteries other than lithium-based.

　　Among them, sodium ion battery (SIB) is a rising star. Because sodium and lithium metal are both alkaline metals and have similar physical and chemical properties, lithium ion battery technology and materials can be used for sodium batteries, but sodium ion batteries have capacity and anode cycle stability. Problem, there is still huge 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 overall battery production costs and increase capacity, and allow sodium-ion batteries to move toward commercialization.

　　JongMinYuk and JeongYongLee of KAIST Institute of Materials Science and Engineering have jointly developed an anode material suitable for sodium ion batteries. In research and testing, the cycle performance of copper sulfide anodes is 1.5 times higher than that of old materials, and the manufacturing cost is expected to be reduced by 40%. .

　　The research team has always been committed to seeking anode materials with high conductivity and high theoretical capacity, and selected copper sulfide nanoplates. The team believes that the compound is easily alloyed with sodium, so it is expected to increase battery capacity and Lengthen cyclicality.

　　Research and analysis also pointed out that after crystallographic adjustment of copper sulfide, room can be left for sodium implantation reaction (ion). The test results show that copper sulfide is The sodium metal ion implantation capacity is about 1.5 times higher, and it can maintain 90% of the initial capacity after 250 charge and discharge cycles.

　　In addition, sodium ion batteries have one of the greatest benefits, that is, the crust content is as high as 2.6%, which ranks sixth in content. The development of sodium ion batteries can help reduce the overall battery cost. Especially for 3C products, the battery cost accounts for 30% of the total. %.