Analysis of the production process and method of positive electrode materials for button cell battery cr1620

Production process and method of positive electrode materials for button cell battery cr1620. The main constituent materials of lithium-ion batteries include electrolyte, isolation materials, positive and negative electrode materials, etc. The introduction of relevant policies on button cell battery cr1620 has promoted the establishment of upstream and downstream enterprises in the industry like mushrooms after rain. As the future development direction of batteries, button cell battery cr1620 have a promising market for positive electrode materials. Current status of the positive electrode material market for button cell battery cr1620 As the core of power button cell battery cr1620, positive electrode materials account for about 30~40% of the manufacturing cost of new energy vehicles. At present, the three types of large-scale market applications include lithium iron phosphate, lithium manganese oxide, and ternary materials nickel cobalt manganese oxide and nickel cobalt aluminum oxide.

Among them, lithium iron phosphate and lithium manganese oxide materials have little room for technical breakthroughs in basic research, and their energy density and main technical indicators are close to the application limit. From the perspective of technological progress, ternary materials have gradually become the mainstream of positive electrode materials for power button cell battery cr1620 due to their advantages such as high energy density, long cycle life, and high reliability.

Driven by the rapid development of button cell battery cr1620 and their downstream industries, the growth of lithium battery positive electrode materials is relatively rapid. In 2016, the global sales of lithium-ion battery positive electrode materials reached 317,400 tons, a year-on-year increase of 42.1%, and the average annual compound growth rate from 2011 to 2016 was 32.17%. From the application structure, the lithium battery positive electrode material market can be subdivided into the small lithium battery positive electrode material market and the power lithium battery positive electrode material market. Small lithium battery positive electrode materials mainly include lithium cobalt oxide, ternary materials and lithium manganese oxide, while power lithium battery positive electrode materials are mainly lithium manganese oxide, lithium iron phosphate and ternary materials. Lithium battery positive electrode material production process The performance of lithium battery positive electrode materials directly affects the performance of lithium-ion batteries, and its cost also directly determines the cost of batteries. The industrial production process of positive electrode materials is relatively large, the synthesis route is relatively complex, and the control of temperature, environment and impurity content is also relatively strict. There are many industrial production processes for positive electrode materials, and the synthesis route is relatively complex. The control of temperature, environment, and impurity content is also relatively strict. The main positive electrode materials are lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate, and ternary materials. Calcination technology uses microwave drying technology to dry lithium battery positive electrode materials, which solves the problem that conventional lithium battery positive electrode material drying technology takes a long time, slows capital turnover, and has uneven drying and insufficient drying depth.

Specific features are:

1. The microwave drying equipment for lithium battery positive electrode materials is used, which is fast and rapid. Deep drying can be completed in a few minutes, and the final water content can reach more than one thousandth;

2. Drying is uniform and the product drying quality is good;

3. Lithium battery positive electrode materials are energy-efficient, safe and environmentally friendly;

4. It has no thermal inertia, and the instantaneous heating is easy to control. Microwave sintered lithium battery positive electrode materials have the characteristics of fast heating speed, high energy utilization, high heating efficiency, safety, hygiene and pollution-free, and can improve the uniformity and yield of products, and improve the microstructure and performance of sintered materials.

General preparation methods of positive electrode materials for button cell battery cr1620 1. Solid phase method Generally, lithium salts such as lithium carbonate and cobalt compounds or nickel compounds are ground and mixed, and then sintered. The advantages of this method are simple process flow and easy availability of raw materials. It is a method that was widely researched, developed and produced in the early stage of lithium battery development, and the foreign technology is relatively mature; the disadvantages are that the capacity of the prepared positive electrode material is limited, the uniformity of raw material mixing is poor, the performance stability of the prepared material is poor, and the quality consistency between batches is poor. 2. Complex method The complex method uses organic complexes to first prepare a complex precursor containing lithium ions and cobalt or vanadium ions, and then sintering and preparing. The advantages of this method are molecular scale mixing, good material uniformity and performance stability, and higher positive electrode material capacity than the solid phase method. Foreign countries have tested it as an industrial method for button cell battery cr1620, but the technology is not mature and there are few reports in China.

3. Sol-gel method Use the method of preparing ultrafine particles developed in the 1970s to prepare positive electrode materials. This method has the advantages of the complex method, and the capacity of the prepared electrode material is greatly improved. It is a method that is rapidly developing at home and abroad. The disadvantage is that the cost is high and the technology is still in the development stage.

4. Ion exchange method LiMnO2 prepared by ion exchange method has obtained a reversible discharge capacity of 270mA·h/g. This method has become a new research hotspot. It has the characteristics of stable electrode performance and high capacity. However, the process involves energy-consuming and time-consuming steps such as solution recrystallization and evaporation, and it is still a long way from practical application. In the field of lithium battery positive electrode materials, any small technological innovation may set off a new round of market expansion. Chinese companies should strengthen the research and development of key technologies for positive electrode materials, achieve international leading position, enhance core competitiveness, and gain advantages in international competition.

The structure of lithium battery is divided into five parts, namely positive electrode, negative electrode, diaphragm, electrolyte and shell.

(1) The positive electrode of lithium battery contains active substances, conductive agents, solvents, adhesives, matrix and other substances.

(2) The negative electrode of lithium battery contains active substances, adhesives, solvents, matrix and other substances.

(3) Lithium battery diaphragm

(4) Lithium battery electrolyte

(5) Lithium battery shell includes steel shell, aluminum shell, cover plate, tab, insulating tape and other hardware.

The above are the production processes and methods of lithium battery positive electrode materials. The price of lithium battery positive electrode materials is still rising sharply. The main reason is that the price of cobalt is still rising. It has risen to 700,000 yuan/ton. This price is no longer affordable for ordinary companies. Therefore, price increase is a predicted trend.

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