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Composite material for positive electrode material of lithium-ion battery and preparation method of composite material

A technology of lithium ion battery and positive electrode material, applied in battery electrodes, positive electrodes, secondary batteries, etc., can solve the problems of decreased charge and discharge performance, decreased electric capacity, etc.

Inactive Publication Date: 2018-09-18
WUHU ZHEXIN NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned prior art, the purpose of the present invention is to overcome the conventional lithium-ion battery in the prior art, after repeated use, its electric capacity will be significantly reduced, resulting in a significant decline in its charge and discharge performance, etc., thereby Provide a composite material for lithium-ion battery cathode material and its preparation method that can still have good charge-discharge performance and cycle performance after repeated use, and prolong its service life

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  • Composite material for positive electrode material of lithium-ion battery and preparation method of composite material
  • Composite material for positive electrode material of lithium-ion battery and preparation method of composite material

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preparation example Construction

[0014] The present invention provides a kind of preparation method for the composite material of positive electrode material of lithium ion battery, wherein, described preparation method comprises:

[0015] 1) In the presence of argon, mix carbon nanoparticles, graphene, acetylene black and sublimed sulfur, and react at a temperature of 150-180°C to obtain a prototype;

[0016] 2) mixing the rudiments prepared in step 1) with nanometer zinc oxide to prepare a composite material for lithium-ion battery cathode materials.

[0017] In the present invention, carbon nanoparticles, graphene, acetylene black, and sublimed sulfur are mixed and reacted at a temperature of 150-180°C, so that sulfur is more uniformly dispersed in carbon nanoparticles, graphene, and acetylene black, effectively suppressing intermediate The dissolution of the product polysulfide in the electrolyte enables it to effectively maintain a stable structure after multiple charges and discharges, and thus has bett...

Embodiment 1

[0027] 1) Under the condition of argon gas protection, mix 10 parts by weight of carbon nanoparticles, 10 parts by weight of graphene, 5 parts by weight of acetylene black and 10 parts by weight of sublimed sulfur at a heating rate of 3 °C / min After raising the temperature to 150°C, the reaction was carried out at a constant temperature and sealed for 6 hours to obtain the embryo;

[0028] 2) 100 parts by weight of the rudiment prepared in step 1) and 5 parts by weight of nano-zinc oxide were mixed to prepare composite material A1 for lithium-ion battery cathode materials.

Embodiment 2

[0030] 1) Under the condition of argon gas protection, mix 10 parts by weight of carbon nanoparticles, 20 parts by weight of graphene, 15 parts by weight of acetylene black and 20 parts by weight of sublimed sulfur at a heating rate of 10 °C / min After raising the temperature to 180°C, the reaction was carried out at a constant temperature and sealed for 12 hours to obtain the embryo;

[0031] 2) 100 parts by weight of the rudiments prepared in step 1) are mixed with 10 parts by weight of nano-zinc oxide to prepare composite material A2 for lithium-ion battery cathode materials.

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Abstract

The invention discloses a composite material for a positive electrode material of a lithium-ion battery and a preparation method of the composite material. The preparation method comprises the steps of (1) mixing carbon nanoparticles, graphene, acetylene black and sublimed sulfur in the presence of argon gas and then reacting at 150-180 DEG C to prepare a prototype body; and (2) mixing the prototype body prepared in the step (1) with nano zinc oxide to prepare the composite material for the positive electrode material of the lithium-ion battery. According to the composite material, the carbonnanoparticles, the graphene, the acetylene black and the sublimed sulfur are mixed and then react at 150-180 DEG C, and sulfur is relatively evenly dispersed into the nanoparticles, the graphene and the acetylene black, so that dissolution of an intermediate product polysulfide in an electrolyte is effectively inhibited, and the composite material is capable of effectively keeping a stable structure after being charged and discharged for multiple times, therefore, the composite material has better cycle performance.

Description

technical field [0001] The invention relates to the field of positive electrode materials of lithium ion batteries, in particular to a composite material used for positive electrode materials of lithium ion batteries and a preparation method thereof. Background technique [0002] With the continuous advancement of science and technology and the continuous improvement of people's living standards, the demand for energy is also increasing, and lithium-ion batteries, as an energy storage device with excellent performance, are widely used in portable devices, computers and telecommunications has a wide range of applications. [0003] However, after repeated use of conventional lithium-ion batteries, their capacity will be significantly reduced, resulting in a significant decline in their charge and discharge performance. [0004] Therefore, it is an urgent problem to be solved in the present invention to provide a composite material for lithium-ion battery positive electrode ma...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/0525
CPCH01M4/364H01M4/38H01M4/628H01M10/0525H01M2004/028Y02E60/10
Inventor 高博王伟周衡郭文波
Owner WUHU ZHEXIN NEW ENERGY