Several new lithium batteries worthy of attention

Some new lithium batteries are worth paying attention to. Lithium battery packs include primary lithium batteries and secondary lithium batteries. As the name suggests, secondary lithium batteries are recyclable, and secondary lithium batteries are disposable. Primary lithium battery technology is relatively mature, but it is only suitable for certain specific applications. Secondary lithium battery packs include lithium batteries, vanadium lithium batteries, lithium sulfur batteries, lithium air batteries, etc. The academic category of lithium batteries only refers to lithium batteries once, and what we commonly call lithium batteries actually refers to lithium batteries. At present, the most popular lithium battery is characterized by the use of lithium oxide anode materials, such as lithium cobalt oxide, lithium manganate, lithium nickel cobalt manganate (commonly known as ternary material), lithium iron phosphate (scientific name is lithium iron phosphate) . The common feature of vanadium lithium batteries, lithium batteries, and lithium batteries is the use of lithium metal as the negative electrode, but they are different. The anode material of the vanadium lithium battery cathode material is vanadium oxide, and the lithium battery cathode material is a mixture of elemental sulfur and a certain amount of conductivity. Material, and the oxygen in the air of the lithium-air battery as a positive reactant. Among the last three types of secondary lithium batteries, vanadium lithium batteries have been industrialized, lithium-sulfur batteries are about to be industrialized, and lithium-air batteries are still in the research and development stage, and are far from industrialization. At present, there are a lot of discussions about the development of lithium-sulfur batteries in our country, mainly due to the influence of the governments of the United States, Japan and Germany. In the United States, the development of lithium-sulfur battery technology has been at the forefront of the world. In 2010, the U.S. Department of Energy invested US$5 million in lithium-sulfur battery research and continued to increase investment. It plans to develop lithium-sulfur battery products with an energy density of up to 500Wh/kg in 2013. In order to maintain its leading position in the field of lithium batteries, the Japanese government is also an important research direction of lithium-sulfur battery lithium-ion battery technology for domestic automotive power, and plans to develop lithium-sulfur battery products with an energy density of up to 500wh/kg in 2020. Germany believes that it has no hope of catching up with these three East Asian countries in the field of lithium batteries, so it strives to develop lithium-sulfur batteries nationwide and hopes to launch a commercial 500wh/kg product around 2020, when the German scientific research community has established a higher The target of energy density lithium-sulfur battery is 1000wh/kg. Although lithium-sulfur batteries are an important direction for the development of the next generation of secondary lithium batteries and deserve close attention, the Chinese government and companies should still pay attention to the development of secondary lithium battery industrialization technologies in the next few years. Because in the secondary lithium battery market, lithium batteries will definitely occupy an absolute monopoly for a long time in the future. The specific reasons are as follows: First of all, there is still much room for improvement in the technology of mature lithium batteries. The important reason why lithium-sulfur batteries are favored is their high theoretical energy density: the capacity of elemental sulfur can reach 1675mAh/g, and the mass-to-energy ratio can reach 2600Wh/kg. But facts have proved that lithium-sulfur batteries are difficult to develop because the German and Japanese governments have set a goal of 500 watt-hours per kilogram by 2020. And the technology is very mature lithium battery technology, there is still great technological progress. Once people think that the 250-year lithium battery energy density theory wh/kg, but the success of lithium-rich manganese-based materials (Japan) also known as solid solution type battery anode materials and solid electrolyte materials and the development of other new material technologies, people have discovered that, The energy density of lithium batteries can also reach 500wh/kg or 700wh/kg, which is far from the theoretical limit of thinking. In addition, current technological progress shows that, compared with lithium-sulfur battery products of the same energy density, 500Wh/kg lithium battery products may be commercialized earlier. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the advantages of graphene in the application of lithium battery electrode materials?