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Novel cathode material and preparation method thereof, and application of cathode material

A positive electrode material and a new technology, applied in the preparation of quinone oxide, battery electrodes, electrical components, etc., can solve the problems of scarce organic positive electrode materials and lithium-rich organic positive electrode materials, and achieve the effect of reducing production costs and improving energy density

Inactive Publication Date: 2019-08-09
欧格尼材料科技江苏有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, it is reported that synthesized, high specific capacity (>400mAh·g -1 ) Organic cathode materials are extremely rare, and to assemble an all-organic lithium-ion battery, the cathode needs lithium-rich organic materials, and reports on lithium-rich organic cathode materials are even rarer

Method used

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  • Novel cathode material and preparation method thereof, and application of cathode material
  • Novel cathode material and preparation method thereof, and application of cathode material
  • Novel cathode material and preparation method thereof, and application of cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This example provides a precursor 2,2',5,5'-tetramethoxybiphenyl, which is specifically prepared by the following method:

[0034] 2-bromo-1,4-dimethoxybenzene (9.4ml, 62.6mmol), 2,5-dimethoxyphenylboronic acid (13.5g, 74.2mmol), K 2 CO 3 (12.0g, 87.0mmol) and tetrakistriphenylphosphine palladium (Pd(PPh3) 4, 5mg, 0.004mmol) were added to N 2 In the reaction bottle of gas protection; Continue to add 120ml anaerobic 1,4-dioxane (1,4-dioxide) and 30ml anaerobic water; N 2 Gas-protected reflux reaction for 48h; After returning to room temperature, add 200ml ethyl acetate for extraction, Na 2 SO 4 dry. The product was separated by column using petroleum ether:ethyl acetate=5:1 (v:v). The white solid product 2,2',5,5'-tetramethoxybiphenyl was obtained in 90% yield (15.5 g, 56.6 mmol).

Embodiment 2

[0036] This example provides a kind of 2,2'-(1,4-benzoquinone), which is specifically prepared by the following method:

[0037] 548mg (2mmol) of 2,2',5,5'-tetramethoxybiphenyl was dissolved in 20ml of acetonitrile under a nitrogen atmosphere, and 4.812g (8.8mmol) of cerium ammonium nitrate (diammonium cerium (IV) nitrate) was dissolved in After 20ml of water was slowly added to the above-mentioned acetonitrile solution at 0°C, the oxidation reaction was carried out for 6 hours; finally, 50ml of ethyl acetate was added for extraction; the product was separated through a column using dichloromethane ether: ethyl acetate = 20:1 (v:v) to obtain Yellow solid product 2,2'-(1,4-benzoquinone), (referred to as BBQ), yield 89% (381mg, 1.78mmol).

Embodiment 3

[0039] This embodiment provides an organic lithium ion positive electrode sheet, and the preparation method of the electrode sheet is as follows:

[0040] Preparation of BBQ-based electrode sheets: First, mix BBQ, conductive carbon additives, and binder evenly; then evenly coat the mixture on aluminum foil and press it into a circular aluminum electrode sheet. Its composition is BBQ: conductive carbon material: the mass proportioning scope of binder is 40~70wt%, 50~20wt%, 10wt% successively, and the proportioning that the present embodiment adopts is 60wt%BBQ, 30wt% conductive carbon material and 10wt% % binder.

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Abstract

The present invention discloses a novel cathode material 2, 2'-(1, 4-benzoquinone), a preparation method of a cathode material and application of the cathode material in a lithium ion battery. The 2,2'-(1, 4-benzoquinone) is obtained by taking 2, 2', 5, 5'-4-Methoxybiphenyl as a raw material and performing oxidizing reaction. The present invention provides a small organic molecule dimer cathode material with a high specific capacity of (501mAh.g-1) which is applied in the lithium ion battery. Therefore, it is helpful to improve the energy density of the lithium ion battery and the productioncost of the lithium ion battery is further reduced.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a novel cathode material, a preparation method and an application thereof. Background technique [0002] Lithium-ion battery is a secondary battery (rechargeable battery) that mainly relies on the movement of lithium ions between the positive and negative electrodes to work. During the charging and discharging process, Li + Intercalation and deintercalation back and forth between two electrodes: when charged, Li + It is deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. [0003] At present, commercial lithium-ion batteries are limited by the actual specific capacity of the cathode material (100-200mAh g -1 ), making it difficult to further increase the energy density of the entire battery. Battery energy density = working volta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/60H01M10/0525C07C50/02C07C46/06
CPCC07C50/02H01M4/60H01M10/0525Y02E60/10
Inventor 樊聪唐武赵伟
Owner 欧格尼材料科技江苏有限公司