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D-A type perylene conjugated polymer lithium ion battery positive electrode material with high rate performance and preparation method thereof

A technology of lithium-ion batteries and conjugated polymers, applied in the direction of active material electrodes, battery electrodes, positive electrodes, etc., can solve the problems of limited commercialization, limited active sites, low rate performance, etc., and achieve fast reaction kinetics, The effect of broad application prospects and excellent rate performance

Active Publication Date: 2021-10-15
LANZHOU UNIVERSITY
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  • Application Information

AI Technical Summary

Problems solved by technology

However, their disadvantages such as high solubility in electrolytes, limited active sites, and low rate capability limit their commercialization.

Method used

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  • D-A type perylene conjugated polymer lithium ion battery positive electrode material with high rate performance and preparation method thereof
  • D-A type perylene conjugated polymer lithium ion battery positive electrode material with high rate performance and preparation method thereof
  • D-A type perylene conjugated polymer lithium ion battery positive electrode material with high rate performance and preparation method thereof

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Embodiment 1

[0033] D-A perylene-based conjugated polymer lithium-ion battery cathode material with high rate performance, using tris(4-aminophenyl)amine as the electron donor (D) unit, and 3,4,9,10-perylenetetracarboxylic Acid dianhydride as electron acceptor (A) unit, see figure 1 , is the infrared spectrum measured experimentally for the raw material and compound 1. Wherein CMP is compound 1, PTCDA is 3,4,9,10-perylenetetracarboxylic dianhydride, and TAPA is tris(4-aminophenyl)amine.

[0034] Its molecular structure is shown in formula 1:

[0035]

[0036] The D-A type perylene-based conjugated polymer lithium-ion battery positive electrode material with high rate performance, when working as a lithium-ion battery positive electrode, such as image 3 As shown, the current density is 0.5, 0.4, 0.3, 0.2, 0.1A / g respectively, and the current density is changed from 0.5Ag -1 gradually reduced to 0.1Ag -1 During the process, the specific capacity of the battery only changed by 4mAh g ...

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Abstract

The invention belongs to the field of organic polymer lithium ion batteries, and discloses a D-A type perylene conjugated polymer lithium ion battery positive electrode material with high rate performance, which takes tris (4-aminophenyl) amine as an electron donor (D) unit and 3, 4, 9, 10-perylene tetracarboxylic dianhydride as an electron acceptor (A) unit. When the material is used as a positive electrode of a lithium ion battery, the material has relatively good electron conduction characteristic and shows excellent rate performance, the current density is reduced by five times, and the specific capacity is only changed by 5%; and the discharge process is formation of free radicals and coordination with lithium ions, so that the material has relatively fast reaction kinetics, and has a wide application prospect in the aspect of high-rate energy storage devices.

Description

technical field [0001] The invention belongs to the field of organic polymer lithium ion batteries, and relates to a D-A type perylene-based conjugated polymer lithium ion battery cathode material with high rate performance and a preparation method thereof. Background technique [0002] At present, the application fields of lithium-ion batteries are becoming more and more diversified. Different usage scenarios have different requirements for battery characteristics, and it is necessary to develop lithium-ion battery electrode materials with different characteristics. Traditional lithium-containing transition metal oxide cathodes cannot meet the requirements of high rate and long cycle use, and the research on electrode materials for lithium-ion batteries has encountered a bottleneck. [0003] Compared with transition metal inorganic materials, organic polymers have received extensive attention as electrode materials for rechargeable batteries, because their components are ma...

Claims

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Application Information

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IPC IPC(8): C08G73/10H01M4/60H01M10/0525
CPCC08G73/1067C08G73/1003H01M4/608H01M10/0525H01M2004/028Y02E60/10
Inventor 潘效波白云飞赵浩
Owner LANZHOU UNIVERSITY
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