Preparation methods of nitrogen-chlorine co-doped polymer intermediate and nitrogen-chlorine co-doped polymer, nitrogen-chlorine co-doped polymer, and application of nitrogen-chlorine co-doped polymer

Abstract

The invention discloses a preparation method of a nitrogen-chlorine co-doped polymer intermediate. The preparation method comprises the following steps: (1) mixing halogenated cyclopentadiene and an alkene nitrile compound, and carrying out a polymerization reaction under the action of a catalyst to obtain a reactant, wherein the catalyst is halogenated metal; and (2) centrifuging, washing and drying the reactant obtained in the step (1) to obtain the nitrogen-chlorine co-doped polymer intermediate. The invention also provides a preparation method of a nitrogen-chlorine co-doped polymer. The preparation method of the nitrogen-chlorine co-doped polymer comprises the following steps: in a protective atmosphere, adding the nitrogen-chlorine co-doped polymer intermediate into a tubular furnace, and carrying out carbonization treatment to obtain the nitrogen-chlorine co-doped polymer. The invention also provides the nitrogen-chlorine co-doped polymer prepared by the preparation method and application thereof. The nitrogen-chlorine co-doped polymer is used as a conductive agent, the addition amount of the polymer in use is small, and the least addition amount can reach about 0.005% of the addition amount of an active substance.

Description

technical field [0001] The invention belongs to the field of battery materials, and in particular relates to a high molecular polymer intermediate for conducting electricity, a preparation method of the high molecular polymer, the high molecular polymer and applications thereof. Background technique [0002] With the depletion of fossil energy such as oil and coal, the energy crisis and energy pollution are approaching, and obtaining new energy has become very urgent. Lithium-ion batteries have the advantages of high voltage, high energy density, high safety, and low self-discharge rate, and are a promising new energy product. [0003] During the charge-discharge cycle of a lithium battery, when current passes through the positive and negative electrodes, a net reaction will occur, indicating that the electrodes have lost their original equilibrium state, and the electrode potential will deviate from the equilibrium potential, resulting in polarization. Lithium battery pola...

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Problems solved by technology

Therefore, the conductive agent for lithium-ion batteries needs to have extremely excellent conductive properties, but the conductive properties of the existing conductive agents (such as Temigo SP, etc.) used on the market are difficult to meet the needs of low additions, and the addition of conductive agents is often relatively high. Many, affect the energy density of lithium-ion batteries

Nitrogen-chloride co-doped polymer is a high-performance modified carbide. In the prior art, there is no report of adding nitrogen-chlorine co-doped polymer as a conductive agent. A nitrogen-chlorine co-doped polymer with more excellent performance is prepared. Doping the polymer and using it as a conductive agent can greatly reduce the amount of conductive agent added

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