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A kind of high thermal conductivity lithium-ion battery cathode sheet and preparation method thereof

A technology for lithium-ion batteries and positive poles of batteries, applied in battery electrodes, non-aqueous electrolyte battery electrodes, secondary batteries, etc., can solve problems such as poor thermal conductivity, and achieve the effect of improving thermal conductivity and high thermal conductivity

Active Publication Date: 2018-07-13
BEIJING DINGNENG KAIYUAN BATTERY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the defects of poor thermal conductivity of lithium-ion batteries in the prior art, the present invention provides a positive electrode sheet of lithium-ion batteries with non-metallic ions added

Method used

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  • A kind of high thermal conductivity lithium-ion battery cathode sheet and preparation method thereof

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Embodiment 1

[0039] This embodiment relates to a positive electrode sheet of a lithium-ion battery, which is prepared from raw materials including the following parts by weight: 1g of silane coupling agent γ-aminopropyltriethoxysilane, 99g of aluminum nitride powder, and active material of lithium ion battery Lithium iron phosphate 9900g, PVDF and NMP mixed glue solution 4000g, in which the mass percentage of PVDF is 15%.

[0040] This embodiment also provides a method for preparing the positive electrode sheet of the lithium ion battery, which includes the following steps:

[0041] 1) After mixing 1g of γ-aminopropyltriethoxysilane and 99g of aluminum nitride powder, put them in a container with 150ml absolute ethanol, stir at 80°C for 2h, and after standing still, filter out the wet composite aluminum nitride powder. Dry the material at 80℃ for 1 hour to obtain composite aluminum nitride powder;

[0042] 2) Mix the composite aluminum nitride powder with 9900 g of active material for lithium io...

Embodiment 2

[0047] This embodiment relates to a positive electrode sheet of a lithium ion battery, which is prepared from raw materials including the following parts by weight: 10g of silane coupling agent γ-aminopropyltriethoxysilane, 90g of aluminum nitride powder, and active material of lithium ion battery Lithium iron phosphate 9900g, PVDF and NMP mixed glue 4200g, in which the mass percentage of PVDF is 10%.

[0048] This embodiment also provides a method for preparing the positive electrode sheet of the lithium ion battery, which includes the following steps:

[0049] 1) After mixing 10g of γ-aminopropyltriethoxysilane and 90g of aluminum nitride powder, put it into a container with 150ml of absolute ethanol, stir at 80°C for 2h, and after standing still, filter out the wet composite aluminum nitride powder. Dry the material at 80°C for 1 hour to obtain composite aluminum nitride powder;

[0050] 2) Mix the composite aluminum nitride powder with 9900 g of active material for lithium ion b...

Embodiment 3

[0055] This embodiment relates to a positive electrode sheet of a lithium ion battery, which is prepared from raw materials including the following parts by weight: titanate ester coupling agent dioctyl pyrophosphate acyloxy group 10g, aluminum nitride powder 90g, lithium ion battery active material Lithium iron phosphate 9900g, PVDF and NMP glue solution 3800g, in which the mass percentage of PVDF is 15%.

[0056] This embodiment also provides a method for preparing the positive electrode sheet of the lithium ion battery, which includes the following steps:

[0057] 1) After mixing 10g of dioctyl pyrophosphate acyloxy group and 90g of aluminum nitride powder, put it into a container with 150ml of absolute ethanol, stir at 80°C for 1.5h, after standing, filter out the wet compound aluminum nitride powder Dry the material at 80°C for 1 hour to obtain composite aluminum nitride powder;

[0058] 2) Mixing the composite diamond powder with 9900 g of active material for lithium ion batte...

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Abstract

The invention relates to a lithium ion battery positive plate. The lithium ion battery positive plate is prepared from the following raw materials in parts by weight: 9,900 parts of battery positive electrode active material, 80-99 parts of inorganic nonmetal powder, 1-20 parts of surface coupling agent and 3,000-5,000 parts of gel solution. The invention also provides a preparation method for the lithium ion battery positive plate; the preparation method comprises the following steps of 1), mixing the inorganic nonmetal powder with the surface coupling agent, and performing coupling under an absolute ethyl alcohol condition to obtain composite inorganic nonmetal powder; 2), mixing the composite inorganic nonmetal powder with the battery positive electrode active material to obtain a mixed material; and 3) mixing the mixed material with the glue solution, then pulping, and performing steps of coating and cutting into slices to obtain the lithium ion battery positive plate. The battery positive plate provided by the invention utilizes the high-thermal-conductivity inorganic nonmetal powder as the additive, so that the thermal conductivity of the lithium ion positive electrode material is improved.

Description

Technical field [0001] The invention relates to the field of lithium ion battery preparation, in particular to a high thermal conductivity lithium ion battery positive electrode sheet and a preparation method thereof. Background technique [0002] At present, lithium-ion batteries are gradually entering the transportation field with their excellent performance and are widely used in electric bicycles, electric buses and other transportation vehicles. With the development and progress of power batteries, higher and higher discharge rates are required for lithium-ion batteries. Because lithium-ion batteries generate a lot of heat during high-rate discharge, this not only affects the discharge performance of the battery, but also because the temperature is too high, the separator between the positive and negative pole pieces is in danger of being melted, and the battery short circuit occurs. , Causing an accident. [0003] The current method to solve this problem is mainly to improv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/13H01M4/136H01M4/62H01M4/139H01M10/613H01M10/653H01M10/654H01M10/0525
CPCH01M4/13H01M4/136H01M4/139H01M4/62H01M10/0525H01M10/613H01M10/653H01M10/654Y02E60/10
Inventor 郑淑芬贾跃祥杨慧敏张建军李永胜
Owner BEIJING DINGNENG KAIYUAN BATTERY TECH
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