For leading companies, advance research and development and technical reserves of forward-looking technologies are directly related to whether they can remain invincible in future competition.

　　As a unicorn in the field of high-nickel cathode materials in China, Rongbai Technology became the first company to accept IPO on the Science and Technology Innovation Board on March 22. In yesterday’s WeChat, the high-tech lithium battery technology and Rongbai Technology in cathodes, especially high-tech The technical strength of nickel cathodes has been analyzed. For details, please click "Application Mainly High-Nickel Three-Yuan Qidian Rongbai Technology's "Technical Ace"".

　　In the field of next-generation cathode materials, Rongbai has also developed new materials such as ultra-high nickel (nickel content higher than 90%) cathode materials, high-voltage nickel-manganese materials, solid-state battery cathode materials, and sodium-ion battery cathode materials.

　　Improving battery energy density is one of the most important goals and directions for the development of lithium batteries. The energy density of ternary lithium-ion batteries can reach up to 300Wh/kg. To achieve the goal of energy density reaching 400Wh/kg in 2025, it is necessary to transform the battery material system and Regarding battery design, the battery system currently most promising to achieve the above technical indicators is all-solid-state battery technology.

　　All-solid-state batteries use solid electrolytes instead of organic liquid electrolytes, which greatly improves the safety of the battery system. At the same time, solid electrolytes are better suited to high specific energy positive and negative electrode materials (such as metallic lithium) and reduce the weight of the system, achieving a simultaneous increase in energy density. The existing ternary cathode materials are not suitable for direct use in all-solid-state batteries and require certain modifications to the ternary cathode materials.

　　In addition to the power field, the energy storage field is also an important scenario for the future large-scale application of chemical power sources. Energy storage batteries require high safety, low cost, and long service life. The existing lithium battery system has limited room for further significant price reductions. New chemical systems need to be found to meet the cost requirements in this field. In the sodium-ion battery system, the cathode material not only does not contain lithium, but also does not contain the more expensive cobalt element, which can significantly reduce the cost of the battery core.

　　In the prospectus released to the public, Rongbai Technology introduced its cathode material technology reserves and latest developments for different markets in the future.

　　Single crystal NCM811

　　Study the ternary co-precipitation controlled crystallization technology of nickel, cobalt and manganese to prepare a small-particle nickel-cobalt-manganese hydroxide precursor with uniform co-precipitation of elements and good dispersion. Research the single crystal NCM811 lithium mixing ratio, doping elements and proportions, atmosphere sintering, crushing, surface treatment and other processes to develop single crystal NCM811 products with high dispersion, high temperature cycle, and high safety performance. The project is currently in the trial production stage.

　　High energy Ni88 type NCM811

　　Through research on the existing NCM811 controlled crystallization technology, a Ni88 nickel cobalt manganese hydroxide precursor with better performance was prepared. Study the lithium mixing ratio, doping elements and proportions, sintering temperature, sintering atmosphere conditions, surface treatment and other processes to prepare a high-nickel (Ni≥88%) layered cathode with higher energy density, stable structure and excellent electrochemical performance. Material. Currently, the project is in the pilot stage.

　　High energy NCA

　　Study the nickel-cobalt (aluminum) co-precipitation controlled crystallization technology to prepare a spherical hydroxide precursor with uniform co-precipitation of elements and closely packed grains. Study the effects of lithium mixing ratio, doping elements and proportions, sintering temperature, sintering atmosphere methods and other processes on the material structure and electrochemical performance to prepare cathode materials with high capacity and stable structure. Research surface treatment technology, including washing, coating and subsequent heat treatment, etc., to reduce the alkali residue of materials, improve cycle and safety performance, research on large and small particle blending technology, the compacted density of pole pieces is ≥3.6g/cc (Ni≥88%), Currently, the project has been put into trial production.

　　Multi-element high energy density NCM

　　Study multi-element co-precipitation controlled crystallization technology to prepare spherical-like hydroxide precursors with uniform co-precipitation of elements and specific growth of crystal grains. Study the lithium mixing ratio, doping elements and proportions, sintering temperature, sintering atmosphere conditions and other processes to prepare cathode materials with high capacity and stable structure. Research surface treatment technology, including washing, coating and subsequent heat treatment, etc., to reduce the alkali residue of materials, improve cycle and safety performance, research on large and small particle blending technology, the compacted density of pole pieces is ≥3.6g/cc (Ni≥90%), At present, the project has been implemented on a small scale.

　　High nickel single crystal Ni90

　　The development of high-nickel single crystal Ni90 products has a 5% higher energy density and a 10% reduction in design costs compared to the first generation single crystal Ni products.

　　Study the ternary co-precipitation controlled crystallization technology of nickel, cobalt and manganese to prepare a small-particle nickel-cobalt-manganese hydroxide precursor with uniform co-precipitation of elements and good dispersion. Research the single crystal Ni90 lithium mixing ratio, doping elements and proportions, atmosphere sintering, crushing, surface treatment and other processes to develop single crystal Ni90 products with high dispersion, high temperature cycle and high safety performance. At present, the project has been implemented on a small scale.

　　Single crystal lithium nickel cobalt manganate ternary cathode material

　　Based on the company's existing high-voltage single crystal material production technology, we will further study the impact of precursor particle size, lithium mixing ratio, doping elements and proportions, sintering temperature, crushing method, coating elements and proportions on the material structure and proportion. Through the influence of electrochemical properties, high-voltage high-nickel single crystal cathode materials with stable structure, good dispersion and excellent cycle life have been prepared. Currently, the project has achieved trial production.

　　High temperature sintering process of lithium nickel cobalt manganate

　　Based on the company's existing lithium nickel cobalt manganate sintering technology, we have studied the lithium mixture and sintering temperature, atmosphere, time, filling amount, etc., and developed a high-temperature sintering technology suitable for large-scale industrialization to meet the energy density of high nickel cathode materials. , structural stability, electrochemical performance and safety performance are increasingly required. At present, the project has achieved trial production.

　　Nickel cobalt lithium manganate cathode material element doping technology

　　Study different methods, elements, and ratio doping processes for lithium nickel cobalt manganate cathode materials, and develop element uniform doping technology suitable for large-scale industrialization to improve the structural stability, power output characteristics, high-temperature cycle life, and safety of high-nickel cathode materials. performance. At present, the project has achieved pilot testing.

　　High temperature sintering process of lithium nickel cobalt manganate

　　Based on the company's existing lithium nickel cobalt manganate sintering technology, we have studied the lithium mixture and sintering temperature, atmosphere, time, filling amount, etc., and developed a high-temperature sintering technology suitable for large-scale industrialization to meet the energy density of high nickel cathode materials. , structural stability, electrochemical performance and safety performance are increasingly required. At present, the project has achieved trial production.

　　Nickel cobalt lithium manganate cathode material element doping technology

　　Study different methods, elements, and ratio doping processes for lithium nickel cobalt manganate cathode materials, and develop element uniform doping technology suitable for large-scale industrialization to improve the structural stability, power output characteristics, high-temperature cycle life, and safety of high-nickel cathode materials. performance. At present, the project has achieved trial production.

　　Development of new precursor technologies

　　Based on the existing precursor research and development technology in China and South Korea, integrate domestic and foreign technical resources, fully master the precursor production technology with precise and controllable composition, uniformity, crystal form, morphology, particle size and distribution, and conduct comprehensive research on the precursor crystal. Grain directional growth, element

　　Conduct in-depth research and development of new technologies such as uniform element doping, gradient deposition, and core-shell structure to meet the growing use requirements of power cathode materials. Currently, the project has achieved pilot testing.

　　Research on nickel-manganese series (involving the development of supporting electrolytes)

　　Develop cathode materials and adapted electrolyte systems with 5V spinel structures; battery systems using these materials have

　　Higher energy density (compared to NCM811) and rate performance, and the cost of cathode materials is low (equivalent to 35% of the cost of NCM materials).

　　Sodium ion battery cathode material

　　Develop a sodium-ion battery system and positive and negative electrode materials with low cost and excellent electrochemical performance; compared with LiFePO4 batteries, this battery system has a cost reduction of about 10-20%, and has better low-temperature performance, high-rate performance and other characteristics.

　　All-solid-state battery cathode materials

　　Through the research and development of solid-state battery technology, we will master the production technology of cathode materials and solid-state electrolytes suitable for all-solid-state battery systems.

　　Detection technology optimization

　　Through the development of new detection technology and the update of original testing technology, the internal microstructure of precursors and cathode materials is analyzed, replacing the conventional method of testing cycle life through battery charge and discharge, and establishing a database to quickly judge and evaluate cycle performance, thereby improving research level and new product development speed

　　Research and develop battery cathode waste recycling technology

　　The prices of cobalt, lithium, nickel, aluminum and copper in waste lithium-ion batteries are relatively high, and some metal resources are scarce. The metals are recycled to ensure a wet recovery rate of ≥98%, thereby reducing raw material costs and reducing environmental harm. the goal of.

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