A kind of quinone compound negative electrode material for aqueous lithium ion battery and aqueous lithium ion battery

A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, secondary batteries, electrochemical generators, etc., can solve problems such as difficulty in bulk electron transport, poor rate performance and cycle stability of organic materials, and achieve discharge specific capacity High, polymer designability, capacity-enhancing effect

Active Publication Date: 2017-10-27
中国人民解放军军事科学院防化研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic compounds are usually insulators, and it is difficult to transport electrons in the bulk phase; and they are easy to dissolve under the action of strong polar solvent water, resulting in poor rate performance and cycle stability of organic materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]Using 1,5-diaminoanthraquinone as a monomer, oxidative polymerization to obtain poly-1,5-diaminoanthraquinone. Mix this anthraquinone polymer with acetylene black and polytetrafluoroethylene (PTFE) binder in water and ethanol at a mass ratio of 80:15:5 to make a slurry (because the subsequent water and ethanol need to be evaporated to dryness, so , adding an appropriate amount), rolling and forming, pressing onto the titanium mesh current collector with a pressure of 30Mpa, and drying at 393K in the air for 6 hours to make an electrode sheet. with 5M LiNO 3 +0.1M LiOH aqueous solution is the electrolyte, the electrode sheet is first placed in the electrolyte solution for 6 hours of vacuum immersion, and then the electrode sheet is used as the negative electrode, the porous polypropylene membrane is used as the separator, and the LiFePO 4 As the positive electrode, the electrolyte is injected into the water-based lithium-ion secondary battery. battery at 40mA g -1 Char...

Embodiment 2

[0026] With 1,5 dichloroanthraquinone as a monomer, with Na 2 S at 140 0 Reactive vulcanization polymerization under C to prepare anthraquinone-based vulcanized polymers. Mix this polymer with acetylene black and PTFE binder in water and ethanol according to the mass ratio of 55:40:5 to make a slurry, roll it into shape, and press it onto the foamed nickel collector with a pressure of 30Mpa. Dry at 393K for 6 hours to make an electrode sheet. Take 1MLi 2 SO 4 +0.2M LiOH aqueous solution is the electrolyte, the electrode sheet is first placed in the electrolyte solution for 6 hours of vacuum immersion, and then the electrode sheet is used as the negative electrode, the porous polypropylene film is used as the separator, and the LiCo 1 / 3 Ni 1 / 3 mn 1 / 3 o 2 The ternary material is the positive electrode, and the electrolyte is injected into the water-based lithium-ion battery. battery at 50mA g -1 Charge and discharge at constant current, the discharge voltage range is 0....

Embodiment 3

[0028] The 1,4,5,8-tetrahydroxy-9,10-anthraquinone monomer is dissolved in the organic solvent acetonitrile, and oxidatively polymerized to obtain a dimer product. Mix this polymer with graphite powder and PTFE binder in water and ethanol according to the mass ratio of 50:45:5 to make a slurry, roll it into shape, and press it onto the foamed nickel collector with a pressure of 30Mpa. Dry at 393K for 6 hours to make electrode sheets. Take 1M Li 2 SO 4 +0.2M LiOH aqueous solution is the electrolyte, the electrode sheet is first placed in the electrolyte solution for 6 hours of vacuum immersion, and then the electrode sheet is used as the negative electrode, the porous polypropylene film is used as the separator, and the LiCo 1 / 3 Ni 1 / 3 mn 1 / 3 o 2 The ternary material is the positive electrode, and the electrolyte is injected into the water-based lithium-ion battery. battery at 50mA g -1 Charge and discharge at constant current, the discharge voltage range is 0.5-1.5V. T...

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Abstract

The invention relates to a quinone compound negative electrode material for a water-based lithium ion battery. The quinone compound negative electrode material is a quinone polymer or a quinone that is directly connected by a C-C bond or connected by an N atom or an S atom. A quinone complex formed by in-situ compounding of a compound monomer with a high-conductivity carbon material during the polymerization process, and the high-conductivity carbon material is one selected from graphite oxide, carbon black, carbon nanotubes, and expanded graphite or more. This type of material has the advantages of high molecular designability, high discharge specific capacity (up to 200mAhg‑1), suitable electrode potential (2~2.8V vs. Li / Li+), good rate performance and cycle performance. The aqueous lithium-ion battery made of this material has the advantages of long cycle life, high efficiency, safety, low cost, and environmental friendliness.

Description

technical field [0001] The invention relates to a quinone compound negative electrode material for a water system lithium ion battery and the water system lithium ion battery. Background technique [0002] Aqueous lithium-ion batteries use aqueous electrolyte instead of organic electrolyte, which eliminates the inherent safety hazards of organic lithium-ion batteries, and the cost is expected to be greatly reduced. Moreover, the ionic conductivity of the aqueous solution is almost 2 orders of magnitude higher than that of the organic electrolyte, which contributes to the improvement of the specific power of the battery. Therefore, aqueous lithium-ion batteries are expected to become a new generation of energy storage devices with development and application potential. [0003] The performance of aqueous lithium-ion batteries mainly depends on the electrode materials. At present, most of the positive and negative electrode materials of aqueous lithium-ion batteries are base...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/60H01M10/38
CPCH01M4/606H01M10/38Y02E60/10Y02P70/50
Inventor 文越华程杰蔡莉丽申亚举徐艳赵鹏程曹高萍杨裕生
Owner 中国人民解放军军事科学院防化研究院
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