Outlook on all solid state lithium secondary battery

Source: 2020 - 03 - 14:26 hits: 30 solid-state lithium secondary battery capacity divided and the corresponding application fields and the preparation process for this piece of production is less, technology is not mature, so I learned the article describe the production process in the same industry. All the solid lithium secondary battery can be divided into film and large capacity. All types of solid lithium batteries battery packaging technology are the same, the main difference lies in the electrodes and the electrolyte membrane preparation. All solid state thin film lithium secondary battery is a battery in the various elements in the order according to the anode, electrolyte and cathode substrate preparation into film, finally encapsulated into the cell. In the process of preparation, should choose corresponding process to separate the battery membrane layer. In general, lithium metal anode, is the most common used vacuum hot gas deposition ( VD) Technical preparation. Anode, electrolyte and anode, including oxide can choose all kinds of sputtering technology, such as rf sputtering ( RFS) Rf magnetron sputtering (, RFMS) And so on, also have a 3 d printing technology research, ready to film. Large capacity solid state lithium secondary battery, due to the wide use of surface, big market, demand, and can quickly scale preparation, low cost in liquid lithium ion batteries are widely used in the high-speed kneading coatings or spraying technology study. On the basis of polymer solid electrolyte, the preparation of large capacity solid-state lithium secondary battery, close to the existing lithium ion battery winding technology. However, considering the flexible inorganic solid electrolyte membrane, Clinton in the preparation of all solid state lithium secondary battery when the process of selecting the texture more, as for the preparation of detailed separation electrolyte and anode diaphragm overlay, or choose a double layer or multilayer coating preparation of electrolytic anode composite layer, more suitable for mass production skills road remains to be further discussed. Although solid-state lithium secondary battery production equipment and traditional lithium-ion battery production equipment are quite different, but not from the objective and the revolutionary perspective, perhaps 80% of the equipment can continue to lithium-ion battery production equipment, production environment has a higher demand, demand a higher level of boring (between All 40 ℃ lower than the dew point) , the super capacitor, lithium-ion capacitor, aluminum, nickel, cobalt, lithium, lithium titanate is sensitive to air energy storage equipment or materials of enterprises, production environment compatible, but the corresponding environmental capital made obvious progress. In the process of preparation, because of the flexibility of the solid electrolyte membrane, solid battery assembly than winding process tend to be layered, but segmentation process is not clear. In terms of manufacturing equipment, solid-state batteries and traditional lithium-ion batteries, although there are a lot of difference, but there is no fundamental difference, is only on the coating, packing and so on craft need to customize equipment, the production environment need to be more demanding of boring. Looking all solid state lithium secondary batteries at present, the development of the new energy vehicles has clearly risen to the height of national strategy, including power battery is the core of the new energy vehicles the most critical components, its key. According to the China energy conservation and new energy car technology roadmap, pure electric vehicle power battery energy density of 2020 guidelines for 300 wh/kg, 2025 of 400 wh/kg, 2030 of 500 wh/kg. Public information, and then select three yuan positive electrode materials and graphite anode material of power lithium ion battery electrolyte energy density of limited to 250 wh/kg, the introduction of silicon-based composite materials rather than pure graphite as the cathode material, the energy density of the power lithium ion battery electrolyte battery can reach 300 wh/kg, ceiling is 350 wh/kg ( Now in the use of panasonic battery, 21700 tesla model is choosing NCA ternary material, negative selection silicon-based composite material, the energy density has more than 300 wh/kg) , the domestic companies have launched 300 wh/kg sample cell.