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Preparation method of organic microporous polymer electrode material

A microporous polymer and electrode material technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of poor cycle performance, hinder the practical application of small molecule conjugated carbonyl compound electrodes, etc., and achieve good electrochemical activity, Good electrochemical performance, simple equipment effect

Inactive Publication Date: 2017-11-03
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Small-molecule conjugated carbonyl compounds have the advantages of high theoretical capacity, fast reaction kinetics, and structural diversity, and are currently the most promising materials in organic electrode materials. However, small-molecule conjugated carbonyl compounds are easily Soluble in the electrolyte, so its cycle performance is not good, which hinders the practical application of small molecule conjugated carbonyl compound electrodes; in order to solve this problem, polymer conjugated carbonyl compounds are gradually being studied by researchers

Method used

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  • Preparation method of organic microporous polymer electrode material
  • Preparation method of organic microporous polymer electrode material
  • Preparation method of organic microporous polymer electrode material

Examples

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Embodiment 1

[0029] A kind of preparation method of organic microporous polymer electrode material in this example, comprises the following steps:

[0030] (1) Take anhydrous aluminum chloride and sodium chloride as raw materials, carry out batching according to the mass ratio of 4.6:1 and stir at 110-200°C for 10-40min to form a molten salt phase;

[0031] (2) Take quinones (such as anthraquinone, pentabenzoquinone, etc.) and honey stone anhydride as raw materials, and mix them uniformly at a molar ratio of 1.5:1;

[0032] (2) Add the prepared material into the molten salt phase in (1), and react at 220-280°C for 12-48 hours;

[0033] (3) Wash and purify the calcined product with different solutions to prepare the positive electrode active material of the battery, and the reflux time is 12 to 24 hours;

[0034] experiments and tests, such as figure 1 and figure 2 shown. Use SEM to observe the positive electrode product of sodium ion battery, such as image 3 For the SEM image of the...

Embodiment 2

[0036] A kind of preparation method of organic microporous polymer electrode material in this example, differs from above-mentioned embodiment 1 in that, in described step (2), raw material is part acenes (as anthracene, pentacene etc.) and Honey stone anhydride, all the other steps and formula are identical with embodiment 1.

[0037] The structural representation of the positive electrode product of the sodium ion battery in this example is as follows Figure 5 Shown, experiment and test condition, method are identical with embodiment 1, record current density 100mA g -1 The first charge and discharge curve is as follows Figure 6 As shown, after 80 cycles, it can have 78 (anthracene) / 115 (pentacene) mAh g -1 specific capacity.

Embodiment 3

[0039] A kind of preparation method of organic microporous polymer electrode material in this example, differs from above-mentioned embodiment 1 in that, in described step (2), raw material is part azine class (as phenazine etc.) and honey stone anhydride, All the other steps and formula are the same as in Example 1.

[0040] The structural representation of the positive electrode product of the sodium ion battery in this example is as follows Figure 7 Shown, experiment and test condition, method are identical with embodiment 1, record current density 100mA g -1 The first charge and discharge curve is as follows Figure 8 As shown, after 50 cycles, it can have 212mAh g -1 specific capacity.

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Abstract

The invention discloses a preparation method of an organic microporous polymer electrode material, and belongs to the technical field of a sodium ion battery electrode material. A hyperbranched molecular-structure PAQR-type conjugated organic framework porous material is built and prepared by friedel-crafts reaction ontological melting or molten salt or solution polycondenstation, and the pore size is controllable. The preparation method comprises the steps of (1) preparing, heating and stirring anhydrous aluminum chloride and sodium chloride according to a mass ratio to form a molten salt phase; (2) adjusting quinone density of a molecular framework arm chain, a conjugated length of a benzene ring and heteroatom by taking honey stone anhydride as a branch point, and uniformly mixing the prepared materials according to a mole ratio; (3) adding the prepared materials of the step (2) into the molten salt phase, and performing temperature-controlled roasting; and (4) washing the roasting product with a solvent in a backflow way, and performing purification to obtain a positive active material. The preparation method is simple in process, is green and environmental-friendly and can be used for production on a large scale, half-cell test shows that a sodium ion battery positive electrode with relatively large radius has relatively good cycle and rate performance, and the quality specific capacity of the sodium ion battery positive electrode is superior to that of a current commercial lithium ion battery positive electrode.

Description

technical field [0001] The invention belongs to the technical field of electrode materials for sodium ion batteries, and in particular relates to a preparation method of an organic microporous polymer electrode material. Background technique [0002] In the past few years, sodium-ion secondary batteries have gradually become an emerging energy storage research direction, which has a much lower cost than lithium-ion batteries and better safety, but because the ion radius of sodium ions is larger than that of lithium ions, Because most of the known electrode materials are not suitable for sodium-ion batteries, and the inorganic metal oxide sodium salt cathode materials reported in some studies make it difficult to increase their specific capacity due to the problem of crystal structure, so the study of flexible structure can design organic Cathode materials are of great practical significance to solving global energy and environmental problems. [0003] Organic electrode mate...

Claims

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Application Information

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IPC IPC(8): H01M4/60H01M10/054
CPCH01M4/602H01M10/054Y02E60/10
Inventor 黄程叶飞黄维
Owner NANJING UNIV OF TECH
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