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Conjugated organic lithium ion battery electrode material and preparation method and application thereof

An electrode material, ion battery technology, applied in battery electrodes, organic chemistry, secondary batteries, etc., can solve problems such as reducing the energy density of organic electrodes, and achieve the effects of novel structure, low requirements for synthesis equipment, and stable performance

Pending Publication Date: 2020-07-24
QUJING NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these strategies can effectively suppress the dissolution of organic compounds in Li-based electrolytes, a large amount of carbon is still required to offset the low electronic conductivity of organic compounds, which reduces the energy density of organic electrodes.

Method used

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  • Conjugated organic lithium ion battery electrode material and preparation method and application thereof
  • Conjugated organic lithium ion battery electrode material and preparation method and application thereof
  • Conjugated organic lithium ion battery electrode material and preparation method and application thereof

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preparation example Construction

[0044] The preparation method of the above-mentioned conjugated organic lithium-ion battery electrode material comprises the following steps:

[0045] 1) Using compound 1 as a raw material, hydrolyze in the presence of concentrated sulfuric acid, the hydrolysis temperature is room temperature, and the hydrolysis time is 72h, to synthesize compound 2;

[0046]

[0047] 2) Compound 2 reacted with TFA, NaNO in the presence of AcOH 2 React at room temperature for 72h, wherein the mass ratio of TFA to compound 2 is 50:1, compound 2 and NaNO 2 The molar ratio is 1:9, then add EtOH solvent, continue with NaHCO 3 react with NaOH at room temperature for 12h, and finally add 6N HCl at 90°C for 1h to obtain H 6 -HAT;

[0048] 3) will get H 6 -HAT was dissolved in an ethanol solution, an excess of lithium hydroxide solution was added, and the reaction was carried out at room temperature for 48 hours to obtain Li 6 -HAT compounds.

Embodiment 1

[0050] Conjugated organic lithium-ion battery electrode materials Li 6 The synthetic route of -HAT is as follows:

[0051]

[0052] Proceed as follows:

[0053] 1) Add 400 g of concentrated sulfuric acid to 10 g of compound 1, stir and react at room temperature for 72 h, filter after the reaction, wash the filtered solid with deionized water for 3 times, then wash with acetone for 3 times, and then vacuum-dry at 100 degrees for 14 h, Obtain compound 2, and the product yield can be realized above 87%;

[0054] 2) Add 4.92g of compound 2 to 150mL of trifluoroacetic acid (TFA) and stir at room temperature, then add 7.0g of sodium nitrite NaNO 2 React at room temperature, the mass ratio of TFA to compound 2 is 50:1, compound 2 and NaNO 2 The molar ratio is 1:9. A brown suspension was obtained after the reaction was complete. Add 150 mL of acetic acid, stir for 12 h, pour into 300 mL of ice water, and filter to obtain a solid product. Dissolve the solid product into 150 mL...

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Abstract

The invention discloses a conjugated organic lithium ion battery electrode material and a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. Firstly, a compound 1 is subjected to acid hydrolysis to synthesize a compound 2, the compound 2 reacts with TFA, NaNO2, NaHCO3 and NaOH and then reacts with HCl to obtain H6-HAT, excessive lithium hydroxide is added for a reaction, and finally the derivative Li6-HAT of 1, 4, 5, 8, 9, 12-hexaazabenzophenanthrene (HAT) is obtained. When the conjugated organic electrode material Li6-HAT is used for a lithium ion battery electrode, the first specific discharge capacity reaches 1126mAh / g under the current density of 0.01 V-3V and 100mA / g; and the discharge capacity is 588.0 mAh / g after 50 cycles. The synthesized conjugated organic electrode material is novel and stable in structure and is a novel lithium ion battery electrode material.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a conjugated organic lithium ion battery electrode material and its preparation method and application. Background technique [0002] Lithium-ion batteries have played an important role in the development of portable electronic devices and are considered to be the most promising energy technology for the next generation of electric vehicles. However, the widespread use of lithium-ion batteries also brings environmental challenges, such as metal pollution and greenhouse effect, which means that the development of environmentally friendly and sustainable electrode materials to replace the traditional graphite anode and inorganic metal oxide cathode is imminent. [0003] Organic materials can make more choices for us because of their environmental friendliness, redox stability, abundance and safety. Organic electrodes have excellent charge storage capabilities due to ...

Claims

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Application Information

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IPC IPC(8): C07D487/14H01M4/60H01M10/0525
CPCC07D487/14H01M4/60H01M10/0525Y02E60/10
Inventor 夏书标刘建军成飞翔
Owner QUJING NORMAL UNIV
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