CN-120118328-B - Imide-based conductive conjugated coordination polymer, and preparation method and application thereof

Abstract

The invention discloses an imide-based conductive conjugated coordination polymer and a preparation method and application thereof, and belongs to the technical field of battery materials. The preparation method of the conductive conjugated coordination polymer comprises the following steps of adding N, N' -dihydroxynaphthalene diimide into a solvent, adding metal salt, mixing and heating to obtain the conductive conjugated coordination polymer. In addition, the invention also provides a conductive conjugated coordination polymer, which is prepared by the preparation method. In addition, the invention also provides the conductive conjugated coordination polymer prepared by the preparation method or the application of the conductive conjugated coordination polymer as a lithium ion battery anode material or a sodium ion battery anode material. The polymer has higher specific capacity as a lithium ion battery anode material or a sodium ion battery anode material.

Inventors

• CHEN YUAN
• ZHANG XINYA
• CHU JIANYI

Assignees

• 内蒙古大学

Dates

Publication Date

20260508

Application Date

20250416

Claims (5)

1. 1. The application of the conductive conjugated coordination polymer based on the imide as a lithium ion battery positive electrode material or a sodium ion battery positive electrode material is characterized in that the conductive conjugated coordination polymer based on the imide is prepared by the following steps: Adding N, N '-dihydroxynaphthalene diimide into a solvent, adding metal salt, mixing and heating to obtain the conductive conjugated coordination polymer based on the imide, wherein the molar ratio of the N, N' -dihydroxynaphthalene diimide to the metal salt is 1 (1-1.5), the heating reaction temperature is 100 ℃ and the time is 48 hours, the solvent is DMF, and the metal salt is one or more of soluble nickel salt, soluble copper salt and soluble cobalt salt.
2. 2. The use according to claim 1, wherein the soluble nickel salt comprises nickel nitrate, the soluble copper salt comprises copper nitrate, and the soluble cobalt salt comprises cobalt chloride.
3. 3. The use according to claim 1, wherein the N, N' -dihydroxynaphthalene diimide is prepared by: Adding 1,4,5, 8-naphthalene tetracarboxylic anhydride and hydroxylamine hydrochloride into a solvent, mixing and heating to obtain the N, N' -dihydroxynaphthalene diimide.
4. 4. The method according to claim 3, wherein the molar ratio of 1,4,5, 8-naphthalene tetracarboxylic anhydride to hydroxylamine hydrochloride is 1 (2-2.5), and/or the temperature of the mixed heating is 65-70 ℃ and the time is 5-7h.
5. 5. The use according to claim 1, wherein the imide-based conductive conjugated coordination polymer, super P and polyvinylidene fluoride are ground and mixed, then NMP solution is added dropwise for further grinding, the obtained slurry is coated on an aluminum foil, and vacuum drying is performed to obtain a positive electrode of a lithium ion battery or a positive electrode of a sodium ion battery.

Description

Imide-based conductive conjugated coordination polymer, and preparation method and application thereof Technical Field The invention relates to the technical field of battery materials, in particular to an imide-based conductive conjugated coordination polymer, a preparation method and application thereof. Background The lithium ion battery and the sodium ion battery are used as two important electrochemical energy storage devices, have the advantages of high energy density, long cycle life, environmental protection and the like, and are widely applied. However, the conventional positive electrode material has the problems of scarce resources, high cost, limited specific capacity and the like, and further development and application of the conventional positive electrode material are limited. The organic electrode material has the advantages of high theoretical capacity, reproducibility, environmental friendliness and the like, and is one of the materials for the important research of lithium/sodium ion batteries. In the organic electrode material, the conductive conjugated coordination polymer material not only inherits the advantages of the high specific surface area and the porous structure of the traditional coordination polymer, but also has excellent electron transmission performance and rich redox active sites, and can effectively improve the specific capacity, the rate capability and the cycle stability of the electrode material. In lithium/sodium ion batteries, the conductive conjugated coordination polymer material can provide high specific capacity and excellent cycling stability as a positive electrode material. The porous structure is favorable for the infiltration and ion transmission of electrolyte, while the conjugated ligand can realize efficient electron transmission and reduce the internal resistance of the electrode. Therefore, the high-efficiency and stable conductive conjugated coordination polymer material is developed, and the application of the high-efficiency and stable conductive conjugated coordination polymer material in the anode material of the lithium-sodium battery is explored, so that the high-efficiency and stable conductive conjugated coordination polymer material has important scientific significance and practical value. At present, a plurality of conductive conjugated coordination polymer materials are used as positive electrode materials for research on lithium/sodium ion batteries, so that the high specific capacity and excellent cycling stability of the electrode materials are realized. There remains a need for novel electrically conductive conjugated coordination polymers with high specific capacities and excellent cycling stability. Disclosure of Invention The invention aims to overcome the technical defects, and provides an imide-based conductive conjugated coordination polymer, a preparation method and application thereof, and the technical problems of how to realize high specific capacity and excellent cycling stability of a battery material in the prior art are solved. In order to achieve the technical aim, the technical scheme of the invention provides a preparation method of an imide-based conductive conjugated coordination polymer, which comprises the following steps: Adding N, N' -dihydroxynaphthalene diimide into a solvent, adding metal salt, mixing and heating to obtain the conductive conjugated coordination polymer based on the imide. In any embodiment, the solvent is DMF. In any embodiment, the metal salt is one or more of a soluble nickel salt, a soluble manganese salt, a soluble calcium salt, a soluble copper salt, and a soluble cobalt salt. In any embodiment, the soluble nickel salt comprises nickel nitrate, and/or the soluble manganese salt comprises manganese chloride, and/or the soluble calcium salt comprises calcium nitrate, and/or the soluble copper salt comprises copper nitrate, and/or the soluble cobalt salt comprises cobalt chloride. In any embodiment, the molar ratio of the N, N' -dihydroxynaphthalene diimide to the metal salt is 1 (1-1.5), and/or the heating reaction temperature is 100-120 ℃ and the heating reaction time is 48-72 h. In any embodiment, the N, N' -dihydroxynaphthalene diimide is prepared by the steps of: Adding 1,4,5, 8-naphthalene tetracarboxylic anhydride and hydroxylamine hydrochloride into a solvent, mixing and heating to obtain the N, N' -dihydroxynaphthalene diimide. In any embodiment, the molar ratio of the 1,4,5, 8-naphthalene tetracarboxylic anhydride to the hydroxylamine hydrochloride is 1 (2-2.5), and/or the temperature of the mixed heating is 65-70 ℃ and the time is 5-7h. In addition, the invention also provides an imide-based conductive conjugated coordination polymer, which is prepared by the preparation method. In addition, the invention also provides the conductive conjugated coordination polymer based on the imide prepared by the preparation method or the application of the conductive conjugated coordination