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Secondary lithium cell using aminobenzene-benzoquinone composite polymer as cathode materal and prepn. thereof

A composite polymer and secondary lithium battery technology, which is applied in secondary batteries, battery electrodes, circuits, etc., can solve problems such as difficult to reach the molecular level and inconspicuous advantages, achieve low cost, improve internal conductivity, and improve the synthesis process non-polluting effect

Inactive Publication Date: 2005-01-12
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because it is difficult for the two to achieve uniform mixing at the molecular level, the advantages in terms of battery performance are not obvious compared with the above electrode materials.

Method used

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  • Secondary lithium cell using aminobenzene-benzoquinone composite polymer as cathode materal and prepn. thereof
  • Secondary lithium cell using aminobenzene-benzoquinone composite polymer as cathode materal and prepn. thereof
  • Secondary lithium cell using aminobenzene-benzoquinone composite polymer as cathode materal and prepn. thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Synthesis of poly-1-aminoanthraquinone cathode material

[0030] Weigh 1.435g of 70% HClO 4 Aqueous solution, 2.280g (NH 4 ) 2 S 2 o 8 , 1.133g concentration of 30% H 2 o 2 Saturated aqueous solution and 2.230g of 1-aminoanthraquinone, mixed the above materials in acetonitrile, reacted for 24h under the protection of argon and magnetic stirring, controlled the reaction temperature at 0°C, and washed the obtained product with acetonitrile and deionized water in sequence after the reaction The brown-black precipitate was air-dried at 60°C for 2 hours and vacuum-dried at 80°C for 12 hours to obtain the poly-1-aminoanthraquinone cathode material.

[0031] 2. Cathode Fabrication

[0032] Weigh poly-1-aminoanthraquinone, acetylene black and polytetrafluoroethylene (60% aqueous emulsion) according to 70:20:10 mass percentage, mix the above-mentioned substances in ethanol dispersant, and put them on the tablet machine after ultrasonic and stirring Press the aluminum ...

Embodiment 2

[0036] 1. Synthesis of poly-1,5-di-aminoanthraquinone cathode material

[0037] In this example, 1.190 g of 1,5-diaminoanthraquinone was selected as the composite polymer monomer, and the synthesis process of the polymer and the dosage of other components were the same as in Example 1.

[0038] 2. Cathode fabrication and battery testing

[0039] The cathode manufacturing process and battery test conditions are the same as in Example 1. Experiments have proved that the first discharge capacity of poly 1,5-diaminoanthraquinone cathode material reaches 210.3mAh g -1 , after 30 charge-discharge cycles, it can still maintain more than 75% of the initial discharge capacity.

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Abstract

Weight percent of components of cathode material is as following: anilin-benzoquinone composite polymer 65-75%, adhesive 5-15% and conduction agent 15-25%; Steps for preparing anilin-benzoquinone composite polymer are as following: according to mol ratio, dissolving benzoquinone, H+, H2O2, (NH4)2S2O8 into acetonitrile; reaction is carried out under protection of inert gases; deposited matter in brownish black color is obtained after washing reactant by using acetonitrile and deionized water; drying deposited matter obtains composite polymer needed. Advantages are: there is composite structure of electronic conduction framework + electrochemical oxidation-reduction functional group in same molecule. Thus the invention ensures both of energy density and cycle performance. Features are simple composite procedure, no pollution, and good cycle performance.

Description

technical field [0001] The invention relates to a secondary lithium battery using aniline-benzoquinone composite polymer as a cathode material and a preparation method thereof, belonging to secondary lithium battery technology. Background technique [0002] Stepping into the 21st century, mobile electronic devices are becoming more and more important to people's daily work and life, thus increasing the demand for secondary batteries worldwide. Special requirements, secondary lithium batteries with strong advantages in energy density are widely valued. [0003] In the research field of secondary lithium batteries, polymer electrode materials have a very important position. Since the 1990s, people have gradually tried electronically conductive polymers, sulfur, organic sulfides and polysulfides as cathode materials for secondary lithium batteries. . S A Chen in U.S. Patent 5,849,045 and 5,863,454 obtained by doping lithium salt in the polyaniline...

Claims

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Application Information

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IPC IPC(8): H01M4/60H01M4/62H01M10/0525
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 唐致远徐国祥余碧涛杨冬平
Owner TIANJIN UNIV
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