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Organic high molecular compound containing thioether bond and uses thereof

A technology of organic polymers and compounds, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of specific capacity decline, high theoretical specific capacity, and battery inoperability, etc., achieve high energy density, simple synthesis and preparation methods, Easy to save effects

Inactive Publication Date: 2008-07-16
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Elemental sulfur is cheap, easy to obtain, less environmental pollution, high theoretical specific capacity, its disadvantage is the formation of S in the redox process 2- , migrate into the electrolyte and form an insulator with lithium ions, making the battery unable to work; adding a conductive agent to improve conductivity results in a decrease in specific capacity

Method used

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  • Organic high molecular compound containing thioether bond and uses thereof
  • Organic high molecular compound containing thioether bond and uses thereof
  • Organic high molecular compound containing thioether bond and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: on the there-necked bottle of 100ml, connect air guide tube, reflux condenser and bubbler, and flow nitrogen therein, cut into the sodium block 2.0g (87mmol) that removes surface oxide layer, use constant pressure dropping funnel to Add dropwise (dropping in about ten minutes) 30ml absolute ethanol, stir at room temperature, add 3.0ml (35mmol) ethanedithiol to the completion of the reaction, continue to stir for one hour, then add 5.3g (16mmol) tetrabromomethane and 10ml of the mixture of absolute ethanol was stirred overnight at room temperature. The above reaction solution was filtered to obtain a solid precipitate, which was washed with distilled water (50ml×3), and dried in an oven at 50°C to obtain 1.98g (63.1%) of a white solid, which was the polytetrakis(methylenethio)methane product. IR: 2913, 1411, 1259, 1184, 1108, 1051, 733, 677cm -1 (C-S) Infrared characterization of the product does not contain C-Br (600-500cm -1 ) key and S-H (2590-2550cm ...

Embodiment 2

[0028] Embodiment 2: on the there-necked bottle of 100ml, connect air guide tube, reflux condenser and bubbler, and flow nitrogen therein, cut into the sodium block 2.0g (87mmol) that removes surface oxide layer, use constant pressure dropping funnel to Add 30ml of absolute ethanol dropwise (dropping in about ten minutes), stir at room temperature, add 3.0ml (35mmol) ethanedithiol after the reaction is completed, continue to stir for one hour, then add 6.0g (32mmol) dibromoethane to it. A mixture of alkanes and 10ml of absolute ethanol was stirred overnight at room temperature. The above reaction solution was filtered to obtain a solid precipitate, which was washed with distilled water (50ml×3) and 50ml ethanol, and the solid precipitate was oven-dried at 50°C to obtain 0.93g (24.2%) of the poly-1-thiopropane-based product as a white solid. IR: 2905, 1629, 1419, 1380, 1261, 1126, 826, 1108, 732, 681 (C-S) The infrared characterization of the product does not contain C-Br (600-...

Embodiment 3

[0031] Embodiment 3: on the there-necked flask of 100ml, connect air guide tube, reflux condenser and bubbler, and flow nitrogen therein, cut into the sodium block 1.75 (76mmol) that removes surface oxide layer, use constant pressure dropping funnel to wherein Add dropwise (dropping in about ten minutes) 30ml of absolute ethanol, stir at room temperature, and add 3.0ml (35mmol) ethanedithiol after the reaction is completed, continue stirring for one hour, then add 5.60g (28.8mmol) methylene bromide and 10ml of the mixture of absolute ethanol was stirred overnight at room temperature. Filter the above reaction solution to obtain a solid precipitate, wash with distilled water (50ml×3), ethanol 50ml, and dry the solid precipitate in a 50°C oven to obtain 1.75g ​​(57.3%) poly-2,4-dithiopentyl product as a white solid . IR: 2924, 1426, 1260, 1185, 1143, 1104, 719, 673 (C-S) IR characterization of the product does not contain C-Br (600-500cm -1 ) key and S-H (2590-2550cm -1 ) bon...

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Abstract

The invention relates to an organic high molecular compound containing a thioether bond. The constitutional formula of the compound is as a right formula, and in the formula, m, n, p, q are not less than 0, x is not less than 1, m plus n is not less than 1, p plus q is not less than 1, and R1, R2, R3 and R4 are respectively alkyl, unsaturated alkanes, thiocarbonyl or aromatic carbocycle base. The organic high molecular compound containing thioether bond used as the positive active materials of a lithium secondary battery has high energy density and good cycle performance. A positive pole is prepared by mixing the compound with acetylene black and polyfluortetraethylene. The lithium secondary battery which is assembled by using a mphihaploidy fluoro alkyl imine sulfoacid lithium and / or multi-fluoro alkyl sulfoacid lithium or the mixture thereof as an electrolyte, dioxane, dioxolane and dimethoxyethane as a solvent, and a metallic lithium sheet as a negative pole has the discharging capacity of 100Ah / kg to 900Ah / kg and good cycling stability.

Description

technical field [0001] The present invention relates to an organic polymer compound containing a thioether bond and its application. The invention belongs to the field of organic polymer chemistry and also belongs to the technical field of lithium battery cathode active materials. Background technique [0002] Today, small and portable electronic products such as mobile phones, mp4 players, notebook computers, etc. provide a lot of convenience for people's life, study and entertainment. Batteries, which are energy sources for these electronics, play an important role. The battery with small volume, small mass and large specific capacity can reduce the volume and weight of electronic products, making it easy to carry. Among the known negative electrode materials, metal lithium has the largest theoretical specific capacity (3861mAhg -1 ), and the most negative standard electrode potential (-3.7V), so lithium batteries or lithium-ion batteries are widely used in portable ele...

Claims

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Application Information

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IPC IPC(8): C08G75/02H01M4/60C08G75/04
CPCY02E60/10
Inventor 詹才茂詹立志张静宇宋志平唐静詹辉周运鸿
Owner WUHAN UNIV