Focus on the next-generation battery star-all solid-state batteries

The solid-state battery is not a new concept. It appeared as early as the 1970s. The solid-state battery was commercialized around 1991. At present, the miniature lithium battery used in the headset is a solid-state battery. At that time, solid-state batteries appeared in the form of thin-film batteries, and the reason why they were not popular at the time was because solid-state thin-film batteries had shortcomings such as small capacity and high cost, but their commercial application also proved that solid-state battery technology was still feasible. With the gradual popularity of new energy vehicles and emerging applications such as the Internet of Things, especially new energy vehicles, which have higher requirements for cruising range, safety, and charging time, batteries have become the key. As traditional liquid lithium batteries continue to approach their application limits, solid-state batteries have gradually entered the public eye. The traditional liquid lithium battery is called a 'rocking chair battery' by the scientific community because of its charging and discharging principle. The two ends of the rocking chair are the positive and negative poles of the battery, and the middle is the liquid electrolyte. Lithium electrons move back and forth across the two ends of the rocking chair, and complete the charge and discharge of the battery during the process of lithium electrons from the positive electrode to the negative electrode. In this process, there are many safety hazards, such as overcharging, the battery is prone to heat, causing the electrolyte to swell, decompose, spontaneously ignite or even explode. The charging and discharging principle of a solid-state battery is the same as that of a liquid battery. The only difference is that its electrolyte is solid, which has many advantages over liquid electrolytes: 1) High energy density. After solid-state batteries use solid electrolytes, they do not need to use lithium-intercalated graphite anodes, but directly use metal lithium as the anode, which can reduce the amount of anode materials and increase the energy density of the entire battery. 2) Small size. The separator and electrolyte in the traditional liquid lithium battery account for nearly 25% of the entire battery mass. With the solid electrolyte, the distance between the positive and negative electrodes can be shortened to a minimum of ten micrometers, so that the thickness and quality of the battery are greatly reduced. NS. 3) Higher security. Because the electrolyte is liquid in traditional batteries, a series of safety hazards described above may occur at high temperatures, while solid-state batteries do not have these problems and have higher safety. In fact, solid-state batteries are not a new concept. They appeared as early as the 1970s. Solid-state batteries were commercialized around 1991. At present, the miniature lithium battery used in headphones is a solid-state battery. At that time, solid-state batteries appeared in the form of thin-film batteries, and the reason why they were not popular at the time was because solid-state thin-film batteries had shortcomings such as small capacity and high cost, but their commercial application also proved that solid-state battery technology was still feasible. At present, many countries and regions in the world have invested in research on solid-state batteries, especially research on all-solid-state batteries. At the 8th Battery New Energy Industry International Summit Forum held in October, many domestic battery companies introduced their research and development status in the field of solid-state batteries, as well as the opportunities and challenges they currently face in this field. Ganfeng Lithium believes that solid-state batteries can well meet the development needs of new energy vehicles in the future. They are currently cooperating with Ningbo Institute of Materials, Chinese Academy of Sciences, and have a long-term and comprehensive technological accumulation in solid-state battery technology, especially in the industrialization of solid-state batteries. In terms of walking in the forefront of the industry. The battery developed by it has passed the comprehensive evaluation of a number of authoritative third parties, and has been applied to car companies. In addition, companies such as Suzhou Qingtao and Beijing Weilan New Energy are also leading the world in the research and development of solid-state batteries. Solid-state battery players Many Japanese companies continue to make efforts in the field of solid-state batteries, including Hitachi Zosen, Fujitsu, TDK, Toyota, Panasonic and other companies that are actively deploying the field of solid-state batteries. Especially Panasonic. According to foreign media reports, Toyota and Panasonic have established a joint venture in 2020, PrimePlanet Energy u0026 Solutions, which will develop and produce prismatic lithium-ion batteries, solid-state batteries and 'next generation' batteries. In addition, it has also developed a solid electrolyte lithium-ion rechargeable battery with a volume energy density of 425h/L in cooperation with the Belgian research institute IMEC. In addition to China and Japan, the United States, South Korea and other countries and regions also have a layout in the field of solid-state batteries. Especially in the new energy automobile industry, solid-state batteries are considered to be the fundamental way to solve the safety problems of power batteries. In particular, in recent years, countries around the world have increasingly stricter environmental supervision over the automotive industry. According to incomplete statistics, more than 12 countries and 25 regions have announced or formulated timetables for banning the sale of fuel vehicles. The replacement of fuel vehicles by new energy vehicles will be the general trend. The all-solid-state battery that can help overcome the problems of cruising range, safety and charging time is the current focus. According to Fuji Economic's forecast, the application of all-solid-state batteries will be gradually expanded from the mid-2020s, and the market size will reach approximately 2.8 trillion yen by 2035, which will increase sharply from the 330 billion yen in 2030. However, the current all-solid-state battery technology also faces many technical challenges, including solid interface issues, high-performance battery material development and engineering issues, as well as large-scale raw materials and industrial manufacturing systems that have not yet formed, and high mass production costs. The most important problem is that there is no standard system for the battery size and safety indicators of solid-state batteries. The full commercialization of solid-state batteries still has a way to go, but it is believed that under the impetus of many new applications and the Ru0026D efforts of companies in various fields, the large-scale popularization of solid-state batteries will soon come.