Anthraquinone lithium battery positive pole and preparation method thereof

A battery positive electrode and anthraquinone lithium technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of increased production costs and complicated operation steps, and achieve the effects of improved production efficiency, simple preparation steps, and low production costs

Inactive Publication Date: 2013-06-05
北京青晓宏拓医药科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of synthesizing polymers has complicated operation steps, which greatly increases the production cost

Method used

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  • Anthraquinone lithium battery positive pole and preparation method thereof
  • Anthraquinone lithium battery positive pole and preparation method thereof
  • Anthraquinone lithium battery positive pole and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Experimental group 1: Weigh 5g of acetylene black powder and 10g of zinc oxide powder, put them into a small grinder, and grind for 1 hour at the speed of the crushing head at 10000r / min. Pass the ground acetylene black powder and zinc oxide powder through a 1000-mesh sieve.

[0024] Weigh 5g of 6-amino-1,3-dihydroxyanthraquinone, 1.67g of sieved acetylene black powder, zinc oxide powder, and 10g of DMF and stir at room temperature for 1h with a paint mixer at a speed of 600r / min. After mixing the above mixture with polyvinylidene fluoride at a mass ratio of 10:1, apply it on an aluminum foil with a doctor blade, and dry it to obtain a positive electrode sheet. In the glove box with lithium as the negative electrode, with 1mol / L LiPF 6 / Ethyl carbonate + diethyl carbonate as the electrolyte, Cellgard2000 polypropylene film as the diaphragm, assembled into a battery, and tested the charge and discharge performance.

[0025] Experimental group 2: Weigh 5g of 6-amino-1,...

Embodiment 2

[0030] Example 2: Put acetylene black powder and zinc oxide powder into a small grinder, and grind for 2 hours at the speed of the crushing head at 10000 r / min. Pass the ground acetylene black powder and zinc oxide powder through a 1000-mesh sieve. Weigh 5 g of anthraquinone derivatives (specifically as shown in Table 2), 1.67 g of sieved acetylene black, and 10 g of DMF, and stir at room temperature for 1 h with a paint mixer at a speed of 600 r / min. The mixture was mixed with polyvinylidene fluoride at a mass ratio of 10:1, coated on aluminum foil with a doctor blade, and dried to obtain a positive electrode sheet. In the glove box with lithium as the negative electrode, with 1mol / L LiPF 6 / Ethyl carbonate + diethyl carbonate as the electrolyte, Cellgard2000 polypropylene film as the diaphragm, assembled into a battery, and tested the charge and discharge performance. The specific results are shown in Table 2 below:

[0031] Table 2: Specific capacity and capacity retenti...

Embodiment 3

[0034] Example 3: Put acetylene black powder and zinc oxide powder into a small grinder, and grind for 0.5 h at the speed of the crushing head at 10000 r / mmin. Pass the ground powder through a 1000 mesh sieve. Take four parts of 5g of 6-amino-1,3-dihydroxyanthraquinone respectively, each part is mixed with acetylene black, zinc oxide and DMF after sieving respectively in a certain proportion (concrete results are shown in Table 3), Stir with a paint mixer, stir at room temperature for 1 h, and rotate at 600 r / min to obtain a mixture. Weigh a certain amount of the mixture, mix it with polyvinylidene fluoride in a certain proportion at a mass ratio of 10:1, apply it on an aluminum foil with a spatula, and dry it to obtain a positive electrode sheet. Afterwards, battery assembly and charge and discharge performance tests were carried out, and the steps were the same as those in Example 1.

[0035] Table 3 Specific capacity and capacity retention of different ratios of 6-amino-1...

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Abstract

The invention discloses an anthraquinone lithium battery positive pole and a preparation method thereof. The concrete preparation method comprises the following steps: (1) acetylene black powder is added to a grinding miller and ground for 0.5 hour to 2 hours, and the ground acetylene black powder is sieved by a 1000-mesh sieve; (2) anthraquinone derivatives, the sieved acetylene black powder, N, N-dimethyl formamide (DMF) are mixed, and blended by a mould wash mixer at a room temperature for one hour at the rotation speed of 600 r / min, so that treated carbon dust is obtained; (3) the treated carbon dust is mixed with polyvinylidene fluoride, so that positive pole slurry is obtained; and (4) the slurry is coated on an aluminum foil with a scraper and stoved dry, so that a positive pole sheet is obtained. The anthraquinone lithium battery positive pole is simple in preparation procedure and free from the phase of synthesis of polymers. A lithium battery prepared by means of the positive pole has the advantage of being large in specific capacity.

Description

technical field [0001] The invention relates to a positive electrode of a lithium battery, in particular to an anthraquinone lithium battery positive electrode and a preparation method thereof. Background technique [0002] The battery cathode is an important component of a lithium-ion battery. The commonly used commercial battery positive electrode materials are mainly inorganic compounds formed by lithium and other metals, such as lithium cobaltate, lithium manganate, lithium iron phosphate, and nickel-cobalt lithium manganate ternary composite materials. However, manganese and nickel are all heavy metals, which not only cause harm to human health, but also often bring serious pollution to the environment during the mining and smelting process. Batteries made of these heavy metals also cause irreversible damage to the environment. On the other hand, the specific capacity of these materials is not high, which severely limits the capacity of the battery. [0003] Organosu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1399H01M4/60H01M4/62
CPCY02E60/122Y02E60/10
Inventor 邓丽娟况丽娟
Owner 北京青晓宏拓医药科技发展有限公司
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