Hebei Messi Biology Co., Ltd. has found that the surface coating modification of magnesium oxide improves the structural stability of magnesium oxide without reducing its useful specific capacity. The specific capacities of the modified lithium cobaltate coated on the surface of magnesium oxide are 145, 175 and 210mAh/g when charged to 4.3.4.5.4.7V (Li+/Li), and the performance improvement of the modified lithium cobaltate is attributed to Mg2+ ions The columnar support between the lithium cobalt oxide layers and the surface coating layer of magnesium oxide prevent Co++ ions from escaping from the lithium cobalt oxide particle body.
The invention relates to the technical field of lithium ion batteries, and discloses a lithium ion battery containing graphene and magnesium oxide, positive electrode slurry and a preparation method. The positive electrode slurry includes component A and solvent N methylpyrrolidone; component A includes the following components in mass percentage: 90-92% of the main active material, 2-3% of conductive carbon black, and 0.5-1% of nano-graphite Alkene, 0.5-1% nano-magnesium oxide, 2.5-5% polyvinylidene fluoride; appropriate amount of solvent N-methylpyrrolidone. The positive electrode slurry of the lithium ion battery of the present invention uses superconducting material graphene and nano-magnesium oxide with stable high and low temperature performance and good thermal conductivity as additives, which can greatly reduce the surface resistance of the positive electrode sheet, improve battery charge and discharge efficiency and cycle stability sex.
Hebei Messi Biology Co., Ltd. nano-magnesium oxide is a new type of nano-particle material. It has a white powder appearance, high purity, and a large specific surface area. It is composed of extremely fine grains and has good dispersion. Quantum size effect and macroscopic tunnel effect, after modification, there is no agglomeration phenomenon, and it has many special properties in batteries, which is very suitable for the application of various battery materials.
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