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Maleimide additive for lithium battery and corresponding lithium battery anode formula

A technology of maleimide and bismaleimide, which is applied in the field of modified maleimide additives for lithium batteries and the corresponding positive electrode formulations of lithium batteries, which can solve the problems of poor cycle performance, low battery life, and safety Insufficient and other problems, to achieve the effect of improving cycle life, improving service life, and inhibiting structural instability

Active Publication Date: 2013-04-17
NENGDONG NEW MATERIAL NANTONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current lithium-ion batteries do not fully meet the existing needs, especially the positive electrode materials in the prior art have poor thermal stability due to their atomic structure and other reasons, resulting in poor cycle performance at room temperature or high temperature, low battery life, and insufficient safety. And other issues

Method used

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  • Maleimide additive for lithium battery and corresponding lithium battery anode formula
  • Maleimide additive for lithium battery and corresponding lithium battery anode formula
  • Maleimide additive for lithium battery and corresponding lithium battery anode formula

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The preparation of the maleimide additive of embodiment 1 cyanamide modification

[0054] With 0.1mol melamine and 0.02mol cyanamide as initiator, 340 mL NMP as solvent, 0.2mol N,N'-4,4'-diphenylmethane-bismaleimide is modified, and the above substances are in React at 130° C. for 3 hours to obtain a modified maleimide containing cyanamide using NMP as a solvent, which is used as an additive for a lithium battery electrode material composition formulation.

[0055] 1820g LiCoO 2 , 120 g of KS6, 60 g of PVDF and 850 g of NMP were mixed uniformly to obtain positive electrode slurry. Then add 11.4g of the above additives and mix evenly, then add zirconium beads and mix for 2.5h, pour out the mixture, filter the zirconium beads, and obtain positive electrode slurry.

[0056] Prepare the positive plate according to the standard lithium-ion battery positive plate preparation method, match the standard negative plate, install the standard battery core with a size of 5mm (hei...

Embodiment 2

[0057] The preparation of the maleimide additive of embodiment 2 cyanamide modification

[0058] With 0.1mol melamine and 0.02mol cyanamide as initiator, 340mL NMP as solvent, 0.2mol reactant N,N'-4,4'-diphenyl ether-bismaleimide is modified, and the above substances are in React at 130° C. for 3 hours to obtain a modified maleimide containing cyanamide using NMP as a solvent, which is used as an additive for a lithium battery electrode material composition formulation.

[0059]1820g LiCoO 2 , 120 g of KS6, 60 g of PVDF and 850 g of NMP were mixed uniformly to obtain positive electrode slurry. Then add 11.4g of the above additives and mix evenly, then add zirconium beads and mix for 2.5h, pour out the mixture, filter the zirconium beads, and obtain positive electrode slurry.

[0060] Prepare the positive plate according to the standard lithium-ion battery positive plate preparation method, match the standard negative plate, install the standard battery core with a size of 5m...

Embodiment 3

[0061] The preparation of the maleimide additive of embodiment 3 cyanamide modification

[0062] With 0.1mol melamine and 0.02mol cyanamide as initiator, 270mL NMP as solvent, 0.2mol reactant N,N'-4,4'-phenyl-bismaleimide was modified, and the above substances were heated at 130°C The reaction was carried out for 3 hours to obtain a modified maleimide containing cyanamide using NMP as a solvent, which was used as an additive for the lithium battery electrode material composition formulation.

[0063] 1820g LiMnO 2 , 120 g of CGCF, 60 g of PVDF and 850 g of NMP were mixed uniformly to obtain positive electrode slurry. Then add 11.0 g of the above additives and mix evenly, then add mixed zirconium beads and mix for 2.5 hours, pour out the mixture, filter the zirconium beads, and obtain positive electrode slurry.

[0064] Prepare the positive plate according to the standard lithium-ion battery positive plate preparation method, match the standard negative plate, install the sta...

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Abstract

The invention discloses a maleimide additive for a lithium battery and a corresponding lithium battery anode formula. The additive is bismaleimide modified by cyanamide and melamine. For the battery prepared by the additive, a needling test proves that the stability of an obtained battery anode active material is increased, and the cycle life of the battery is prolonged. With the adoption of the additive, a protective film is formed on the surface of the anode active material, the anode active material can be prevented from being cracked during internal short circuit, and the battery is safer; in addition, as the good safe protective film is formed on the surface of the anode active material, the service life of the lithium battery is prolonged.

Description

technical field [0001] The invention relates to the field of battery materials, in particular to a modified maleimide additive for a lithium battery and a corresponding lithium battery cathode formula. Background technique [0002] Lithium-ion secondary battery is a concept proposed by Armand in the 1980s. He proposed that the positive and negative electrode materials of the battery use lithium ion materials that can be stored and exchanged, and energy exchange is performed by using the ions to move back and forth during charging and discharging. [0003] In 1991, LiCoO was produced by Japan's SONY company. 2 Lithium-ion batteries are commercial lithium-ion batteries with carbon black as the positive electrode material and carbon black as the negative electrode material. Since then, lithium-ion batteries have rapidly replaced nickel-cadmium and nickel-metal hydride batteries in many fields. Lithium-ion batteries have very broad application prospects in electric vehicles and...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/13
CPCY02E60/10
Inventor 朱政
Owner NENGDONG NEW MATERIAL NANTONG CO LTD
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