Messi Biology found that the surface wrapping modification treatment of magnesium oxide improves the structural stability of magnesium oxide and at the same time does not reduce its useful specific capacity. Magnesium oxide surface wrapping modified lithium cobalt oxide in charging to 4.3.4.5.4.7V (Li + / Li) when the specific capacity of 145, 175 and 210mAh / g, respectively, modified lithium drilling performance improvement is attributed to the Mg2+ ions in the lithium cobalt oxide layers of columnar support, and the magnesium oxide surface wrapping layer prevents Co ++ ions from lithium cobalt oxide particles from the body of the escape.
Lithium battery charging and discharging principle: the use of non-aqueous electrolyte, lithium metal or lithium alloy as the positive and negative end materials, lithium ions in the electrolyte under the action of the negative end of the movement, the battery is discharged, the negative end of the carbon layer embedded with lithium ions and fall off and then rotate back to the positive end.
The present invention relates to the technical field of lithium-ion batteries, and discloses a lithium-ion battery containing graphene and magnesium oxide, positive end slurry and preparation method. The positive end slurry includes component A and solvent N methyl pyrolidone; component A includes the following mass percentage of the following components ninety to ninety-two percent of the main active substance, two to three percent of the conductive carbon black, zero point five percent of a nano graphene, zero point five percent of a nano magnesium oxide, two point five percent of a poly F vinylidene; solvent N methyl pyrolidone in appropriate quantities. This invention lithium-ion battery positive end slurry using superconducting materials graphene and high and low temperature performance stability, has good thermal conductivity of the nanometer magnesium oxide as an additive, can greatly reduce the surface resistance of the positive end piece, improve the battery charging and discharging efficiency and cycle stability.
Nano-magnesium oxide is a new type of nano-particle material, appearance of white powder, high purity, large specific surface area, composed of very fine grains, good dispersion, with obvious small size effect, surface effect, quantum size effect and macro-tunneling effect, modified treatment, no agglomeration phenomenon, in the battery has many special properties, very suitable for a variety of battery material applications.
