Lithium battery: my country's research and development prospects are optimistic

Facing the development of lithium batteries in my country, experts are optimistic. In real life, lithium batteries are developing rapidly, and we seem to be surrounded by lithium. Lithium batteries have become the standard for mobile phones, computers, and electric vehicles; if Tesla’s energy wall heralds the future, then lithium batteries will also become the core of modern family life. However, the term lithium battery actually covers a variety of technologies, and they are very different. Chen Lijian, a researcher at the Gusu Institute of Nanotechnology, Chinese Academy of Sciences, said that what we generally know about lithium batteries is actually lithium batteries. It relies on lithium ions embedded in the positive and negative electrodes, and converts electrical and chemical energy at the output, and then ends the charge and discharge process. Lithium batteries: my country's research and development prospects According to the data of positive and negative electrodes, there are many kinds of lithium batteries. Chen Limei said that lithium cobalt oxide and ternary data are used for the positive electrode of mobile phone batteries, and graphite data is used for the negative electrode. When charging, the positive electrode lithium ions move to the graphite negative electrode through the electrolyte and are embedded in the graphite interlayer. During the discharge process, the lithium ions between the graphite layers come out, and then return to the positive electrode through the electrolyte. The greater the storage capacity of the positive and negative data, the greater the potential difference between lithium ions and lithium ions, and the higher the energy density of the battery. Regarding Tesla batteries, lithium nickel cobalt aluminate (NCA) is used for the positive electrode. Chen Lizhi said. In addition, lithium battery anodes are lithium cobalt acid, ternary data, lithium manganese acid, lithium iron phosphate and so on. Domestic battery giant BYD uses lithium iron phosphate as the positive electrode of its electric vehicles. Chen said that since the current negative electrode data is nearly twice the capacity of the positive electrode data, the development of a positive electrode data with a higher specific capacity is the bottleneck factor for lithium batteries to increase the energy density. Although the energy density, high-temperature and low-temperature performance of lithium batteries, and many other functional indicators, are far higher than traditional lead-acid batteries, nickel-metal hydride batteries and other secondary batteries, the progress of their energy density and cycle life functions, However, it is still difficult to meet the requirements of the rapidly rising consumer electronics, electric vehicles, grid energy storage and other emerging industries. In order to further improve the performance of batteries, in addition to lithium batteries, there are also some research institutions and start-up companies around the world that are studying new types of lithium batteries. Taking the lithium-sulfur battery researched by Chen Lizhi as an example, with sulfur as the positive electrode and metallic lithium as the negative electrode (a lithium battery in the strict sense), the energy density of its components is expected to be more than twice that of existing lithium batteries. In addition, the research hotspots of lithium batteries also include the use of lithium-air batteries and solid electrolyte lithium batteries. If these new batteries can be put into practical use, the energy density of the batteries can be greatly improved, promoting the development of consumer electronics, new energy vehicles, energy storage and other categories. The benefits are many, but the risks are also great. Chen said: There are often demo versions of new batteries, but even with the results published in important journals, many landmines were encountered during the engineering process. There are many difficulties in successfully using them. The media often exaggerate the functions of the new batteries and are too optimistic. new technology. Industry progress measures are important for the development of lithium batteries on the basis of a mature system. According to different use requirements, the body structure design stage of doping, surface coating, and electrode materials is targeted, such as electrolyte formulation, process control, Step by step, some aspects of functional performance, reduce side-uses, ensure product safety, reliability, and the industry are such a gradual improvement. Chen Lizhi said. At present, my country's technological level lags behind South Korea and Japan, and ahead of Europe and the United States. In the past, we mainly occupied the middle and low-end shopping malls. However, with the increase of investment by our companies, we are moving towards high-end shopping malls. However, Chinese companies still lag behind Japan and South Korea in terms of processing management, process control, and processing automation, and must make further efforts. 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 article: Four ways to charge lithium batteries correctly