Lithium batteries are the most advanced battery technology today, with high energy density, long life, low self-discharge, environmental protection and other advantages. They are widely used in smart phones, laptops and other electronic products, as well as new energy vehicles and wind energy, solar energy and other large-scale energy storage devices. With the global carbon reduction goals, electrification transformation and policy regulations, the lithium battery market demand is showing explosive growth. It is expected that by 2025, the global lithium battery market size will reach 1.1 trillion US dollars.
The performance and quality of lithium batteries depend not only on the activity and stability of lithium ions, but also on the selection and ratio of battery materials. Among them, magnesium carbonate is an important battery material, which is mainly used to make the precursor of positive electrode material, and can also be used to improve the structure and conductivity of negative electrode material. Magnesium carbonate plays an indispensable role in lithium batteries, but how to choose high-quality magnesium carbonate? Here are some tips:
- Check whether the main content of magnesium carbonate is stable. The main content of magnesium carbonate refers to the content of magnesium ions, which is generally controlled between 40-42%. Too high or too low magnesium ion content will affect the ratio and performance of positive electrode material. Therefore, when choosing magnesium carbonate, choose those manufacturers with high production technology and technology level. They can accurately control the magnesium ion content of magnesium carbonate and ensure the quality of product drying and impurity removal.
- Check whether the magnetic impurities of magnesium carbonate are controlled in a low range. Magnetic impurities refer to metal elements or compounds such as iron, cobalt, nickel, etc., which will affect the migration speed and efficiency of lithium ions between positive and negative electrodes, reduce the capacity and life of batteries. Therefore, when choosing magnesium carbonate, choose those products with magnetic impurities less than 500 ppm (one in a million), and verify them by professional testing instruments.
- Check whether the particle size of magnesium carbonate is moderate. The particle size of magnesium carbonate will affect the morphology and crystallinity of positive electrode material, and then affect the charge-discharge performance and cycle stability of batteries. Therefore, when choosing magnesium carbonate, choose those products with small particle size span and similar particle size with other materials. Generally speaking, the particle size D50 (i.e., 50% cumulative distribution particle size) of magnesium carbonate is about 2 microns, D90 (i.e., 90% cumulative distribution particle size) is about 20 microns.
In short, in the context of rapid expansion of lithium battery market, magnesium carbonate as an important battery material, its quality directly affects the performance and quality of lithium batteries. Therefore, when choosing magnesium carbonate, we must choose those products with stable main content, low magnetic impurities and moderate particle size to ensure the efficient operation and long-term use of lithium batteries.
Post time: Jul-19-2023