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release time:2024-08-08 Hits: Popular:AG11 battery
The nickel content of cr2032 button battery has increased again! New requirements for electrolytes
According to industry reports cited by Korean media ETNews, LG Chem plans to supply its ultra-high nickel NCMA batteries to TSLA in the next year. The nickel content in the latter's positive electrode material has increased to 90%, while the cobalt content has been reduced to less than 5%. A single charge can provide at least 600 kilometers of driving range, which is higher than the 500 kilometers currently common on the market. It can be seen that the trend of high nickel in cr2032 button battery is obvious, but as the nickel content increases, the alkalinity of the material will become stronger, and the thermal stability of the material will also decrease. This will increase the requirements for battery technology and environment, and the matching requirements for electrolytes used in cr2032 button battery will also be improved.
This year's new energy electric vehicle market has been booming, driving the prosperity of the entire new energy electric vehicle industry chain. At the same time, improving the endurance of new energy, reducing costs and reducing the use of cobalt have become the direction of technology research and development for various automakers. Adding new energy density ratios, increasing voltage, increasing the use of nickel and reducing the use of cobalt and other technical means are the direction to solve the above problems.
According to Korean media ETNews, citing industry reports, LG Chem plans to supply its ultra-high nickel NCMA batteries to TSLA in the coming year. The nickel content in the latter's positive electrode material has increased to 90%, while the cobalt content has been reduced to less than 5%. A single charge can provide at least 600 kilometers of driving range, which is higher than the 500 kilometers currently available on the market.
At present, the trend of high nickel content in lithium battery ternary materials is becoming more and more obvious. Mainstream battery manufacturers such as CATL, LG Chem, SKI, etc. have deployed high nickel ternary NCM811 production lines in the past two years.
However, the substantial increase in nickel content has also changed the characteristics of battery materials, and accordingly, new requirements have been placed on battery processes, materials, and the environment.
What changes will occur in battery materials when nickel content increases?
As the nickel content continues to increase, the alkalinity of the material will become stronger, and at the same time, the thermal stability of the material will decrease, which will lead to poor structural stability of the battery material. In addition, when the lithium battery is charged, the high nickel content has stronger oxidizing properties. The changes brought about by high nickel have new requirements for the materials used in cr2032 button battery, requiring higher matching.
The trend of high voltage also has new requirements for battery materials
In order to solve the problem of low mileage of new energy electric vehicles, improving the energy density ratio of batteries while keeping the volume unchanged is an important technical means at present, and increasing the voltage is one of the ways to increase the energy density.
The voltage of a single lithium battery has gradually transitioned from the original 4.2V to 4.35V, 4.4V, 4.5V and even 5V, and the voltage platform of electric vehicles has increased from 400V to 800V. In this way, the high performance of electric vehicles is pursued, and the charging time is shortened. Under the conditions of the same performance and the same power, the volume of the battery is relatively smaller, and the space and weight of the overall wiring of the car are reduced. At the same time, the working power of electric vehicles can be increased.
High voltage brings many benefits, but it has higher requirements for battery materials. Conventional electrolyte systems are difficult to match high-voltage positive electrodes. In voltage environments above 4.5V, conventional electrolytes are prone to decomposition.
Which material has higher matching?
LiFSI (lithium bis(fluorosulfonyl)imide) is the most compatible material at present. Compared with LiPF6 (lithium hexafluorophosphate), LiFSI has better thermal stability, electrochemical stability and higher conductivity. LiFSI can improve the conductivity, high and low temperature performance, hydrolysis resistance, etc. of the electrolyte, and can inhibit gas expansion, which can significantly improve the performance of the battery and is more compatible with high-nickel and high-voltage batteries.
LiFSI was initially used to replace LiPF6 with its better high temperature and high conductivity properties, but due to its high cost and certain corrosion to aluminum foil, it has not been replaced on a large scale in the past. However, in recent years, LiFSI has been used in some high-end electrolyte products in the form of lithium salt additives to improve the low temperature performance and thermal stability of the battery.
The requirements of new energy electric vehicles for batteries are obviously high-voltage and high-nickel, and high requirements are placed on the matching of battery materials. LiFSI has excellent chemical properties. Driven by demand, the amount of LiFSI added is expected to continue to rise.
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