Polycarbonyl polyimide organic electrode material, preparation method and application thereof

A carbonyl polyimide and organic electrode technology, which is applied in battery electrodes, circuits, electrical components, etc., can solve the problems of poor rate performance, low conductivity, high solubility, etc., and achieve improved cycle stability, easy availability of raw materials, The effect of cheap raw materials

Pending Publication Date: 2022-03-01
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current organic electrode materials, especially small molecules, have high solubility in organic electrolytes, which leads to serious capacity fading problems. At the same time, organic electrode materials generally have low conductivity, which leads to poor rate performance and other problems.

Method used

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  • Polycarbonyl polyimide organic electrode material, preparation method and application thereof
  • Polycarbonyl polyimide organic electrode material, preparation method and application thereof
  • Polycarbonyl polyimide organic electrode material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Step 1: Under inert (argon) conditions, 3mmol NTCDA and 3mmol maleamide diamide were successively added to 30mL m-cresol under mechanical stirring (400 rev / s), followed by 2mL isoquinoline, and the temperature was raised to Reflux reaction 20h obtains polycarbonyl polyimide (PMN) crude product mixed solution;

[0037] Step 2: discharge the polycarbonyl polyimide (PMN) crude product mixed solution obtained in step 1 into methanol, then suction filter the obtained mixed solution, and wash the filter residue with acetone and N-methylpyrrolidone (NMP) respectively After three times, the obtained solid was vacuum-dried to obtain polycarbonyl polyimide (PMN), the structural formula is as follows, and the yield was 68%.

[0038]

[0039] Through the electron microscope test ( figure 1 ) found that the microscopic morphology of PMN is a flake-like solid with a length of 1 to 3 microns, and the infrared test ( figure 2 ) shows that there are two carbonyl peaks in different...

Embodiment 2

[0043] Under inert (argon) conditions, 3mmol NTCDA and 3mmol azodicarbonamide were successively added to 30mL m-cresol under mechanical stirring (400 rev / s), followed by 2mL isoquinoline, heated to reflux for 20h to obtain Polycarbonyl polyimide (PAN) crude product mixed solution;

[0044] Step 2: Discharge the polycarbonyl polyimide (PAN) crude product mixed solution obtained in step 1 in methanol, then suction filter the obtained mixed solution, and wash the filter residue with acetone and N-methylpyrrolidone (NMP) respectively After three times, the obtained solid was vacuum-dried to obtain polycarbonyl polyimide (PAN), with a yield of 74%, and the structural formula was as follows.

[0045]

[0046] Through the electron microscope test ( Figure 4 ) found that the microscopic morphology of PAN is a flake-like solid with a length of 1-5 microns, and the infrared test ( Figure 5 ) shows that there are two carbonyl peaks in different chemical environments and the generati...

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Abstract

The invention discloses a polycarbonyl polyimide organic electrode material as well as a preparation method and application thereof, and belongs to the technical field of lithium ion battery electrode materials. The preparation method comprises the following steps: under an inert condition and mechanical stirring, sequentially adding anhydride and a carbonyl-containing diamine monomer into an organic solvent, then adding isoquinoline, and heating until a reflux reaction is performed for a period of time to obtain a polyimide crude product mixed solution; and discharging the polyimide crude product mixed solution into methanol, ethanol or acetone, carrying out suction filtration to obtain filter residues, washing the filter residues with acetone and N-methyl pyrrolidone, and carrying out vacuum drying on the obtained solid to obtain the polycarbonyl polyimide electrode material. According to the invention, condensation polymerization of 1, 4, 5, 8-naphthalene tetracarboxylic anhydride and electroactive carbonyl-containing diamine is utilized to construct an electroactive polymer with an extended pi conjugated system, and high capacity and excellent cycle stability of an electrode material are realized by increasing the density of active sites in polyimide, so that large-scale production is facilitated, and the preparation method is suitable for industrial production. Therefore, the method has a very high application prospect.

Description

technical field [0001] The invention belongs to the field of organic lithium-ion battery electrode materials, and in particular relates to a polycarbonyl polyimide organic electrode material, a preparation method and an application thereof. Background technique [0002] Lithium-ion batteries have been widely used in the field of mobile electronic devices as the main energy storage device, and have shown great potential and prospects in large-scale energy storage applications, such as electric vehicles and large-scale grid integration. However, since commercial lithium-ion batteries are mainly composed of metal oxides containing inorganic transition elements, these transition metal oxides rely heavily on transition metals with limited resources, are expensive, energy-intensive in processing, and may cause serious environmental problems. With the current urgent pursuit of green energy, it has become a hot and difficult point in the field of energy storage to find new battery m...

Claims

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Application Information

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IPC IPC(8): C08G73/12C08G73/10H01M4/60
CPCC08G73/12C08G73/1096C08G73/1067C08G73/1082C08G73/1007H01M4/606Y02E60/10
Inventor 关绍巍王俊姚洪岩
Owner JILIN UNIV
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