Long-endurance button lithium battery and manufacturing method thereof

Abstract

The invention discloses a long-endurance button lithium battery and a manufacturing method thereof, the button lithium battery comprises seven parts: a positive pole piece, a negative pole piece, an electrolyte, a stainless steel shell, a lithium piece, a diaphragm and insulating rubber, and the functional material in the positive pole piece is an organic material generated through reaction of perylene-3,4,9,10-tetracarboxylic dianhydride, and tris (2-aminoethyl) amine in N-methyl pyrrolidone medium; and the functional material in the negative pole piece is a composite material generated by reacting ferric acetylacetonate Fe (acac) 3, polyacrylonitrile (PAN) and polymethyl methacrylate (PMMA) in N, N-dimethylformamide medium. The invention has the advantages of long service life, small cycle attenuation, good stability and easy molding.

Description

technical field [0001] The invention relates to the technical field of lithium battery materials, in particular to a long battery life button lithium battery and a manufacturing method thereof. Background technique [0002] The world's expanding demand for energy is one of the major challenges of the 21st century. With the rapid development of energy storage power supply and electric vehicles, higher requirements are placed on the performance of lithium-ion batteries, so the development of lithium-ion batteries with high energy density has become one of the focuses of research. At present, the widely used inorganic cathode materials are lithium transition metal oxides, such as LiCoO2, LiNiO2, LiMn2O4, LiFePO4, etc., which have the following disadvantages: ①Theoretical specific capacity is below 300mAh / g, and the actual available specific capacity does not exceed 200mAh / g. g, the room for improvement is very limited; ②All use non-renewable mineral deposits as raw materials, ...

AI Technical Summary

Problems solved by technology

At present, the widely used inorganic cathode materials are lithium transition metal oxides, such as LiCoO2, LiNiO2, LiMn2O4, LiFePO4, etc., which have the following disadvantages: ①Theoretical specific capacity is below 300mAh / g, and the actual available specific capacity does not exceed 200mAh / g. g, the room for improvement is very limited; ②All use non-renewable mineral deposits as raw materials, and mining them at the same time consumes a lot of energy, which does not meet the requirements of sustainable development; ③Traditional inorganic cathode materials still have hidden dangers in terms of safety. When the battery is overcharged, it is easy to produce high-valent metal oxides, accompanied by the release of oxygen, resulting in a violent exothermic reaction with the electrolyte

[0003] Due to its limited specific capacity (372mAh / g), traditional anode materials based on graphite can no longer meet the growing demand for high energy density batteries, so the development of new anode materials with higher performance has become an urgent task.