Manufacture process for lithium ion battery negative pulp adopting lithium titanate material

Abstract

The invention relates to manufacture process for lithium ion battery negative pulp adopting a lithium titanate material, which enables the lithium ion battery negative pulp to be high in safety, good in multiplying performance and long in service life. The steps comprise dosing materials by weight: lithium titanate: 100, carbon black SUPER-P: 2-4.5, polyvinylidene fluoride: 7-11 and N-methyl pyrrolidone: 100-120; under the conditions of drying and avoiding oxidization, sequentially adding polyvinylidene fluoride, carbon black SUPER-P, lithium titanate and remaining N-methyl pyrrolidone into N-methyl pyrrolidone solution, evenly mixing the solution, slowly mixing 1-1.5 hours in vacuum mode after obtaining the pulp viscosity ranging from 6000 to 8000cps; and standing the pulp to remove bubbles in the pulp after slow stirring is finished, and then obtaining the lithium titanate negative pulp through a 100-150 mesh screen. By utilizing the manufacture process with an ideal scattering effect, the purposes of simplifying pulp manufacture process and improving the pulp scattering effect are achieved.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a manufacturing process of lithium ion battery negative electrode slurry made of lithium titanate. Background technique [0002] The earth's energy is limited, but human consumption is unlimited. Energy shortage will threaten the survival and development of human beings. Therefore, the development of new energy sources to replace traditional oil is imminent. In order to solve the energy shortage problem, countries all over the world have invested a lot of manpower and material resources in the research and development of new energy sources. Research on new energy technology involves many technical fields such as solar energy, wind energy, and nuclear energy. Lithium-ion power batteries are one of the most important projects and one of the research hotspots. Lithium-ion power batteries and materials can be widely used in transportation, power and other ...

AI Technical Summary

Problems solved by technology

[0003] In the relatively mature lithium-ion power batteries at present, the vast majority of negative electrodes are prepared with carbon negative electrode materials as active materials; however, due to the large energy loss and poor high-rate charge and discharge performance of carbon negative electrode materials, etc.

Carbon anode materials are easy to form passivation film (SEI) in organic electrolytes, causing initial irreversible loss of specific capacity; and the potential of carbon electrodes is very close to that of metal lithium. When the battery is overcharged, metal lithium is easy to precipitate on the surface of carbon electrodes. , forming dendrites and causing a short circuit, which brings potential safety hazards; there is also a large volume change of the carbon negative electrode material during the lithium ion intercalation and extraction process, resulting in poor cycle stability and other shortcomings

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