Material for lithium-sulfur battery current collector and preparation method thereof

A technology for lithium-sulfur batteries and current collectors is applied in the field of materials and preparations of current collectors for lithium-sulfur batteries, which can solve the problems that restrict the high-rate discharge performance and cycle performance of lithium-sulfur batteries, and improve the high-rate discharge performance and cycle performance. , Good mechanical strength, high capacity effect

Pending Publication Date: 2020-02-04
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a current collector material for lithium-sulfur battery and its preparation method in order to solve the problem that the existing current collector materials restrict the high-rate discharge performance and cycle performance of lithium-sulfur batteries in practical applications. One-dimensional nanoarray structure of Ni 0.25 co 0.75 (OH) 2 Nano-hierarchical materials can provide a large enough specific surface, enough ion diffusion channels and electron transport channels

Method used

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  • Material for lithium-sulfur battery current collector and preparation method thereof
  • Material for lithium-sulfur battery current collector and preparation method thereof
  • Material for lithium-sulfur battery current collector and preparation method thereof

Examples

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Embodiment 1

[0025] The material used for the lithium-sulfur battery current collector is Ni with a one-dimensional nano-array structure 0.25 co 0.75 (OH) 2 nanoscale materials.

[0026] The preparation method of the current collector material for lithium-sulfur batteries comprises the following steps:

[0027] (1) Preparation of basic cobalt-nickel carbonate nanowire array: first cut the foam into a block with a size of 3 × 2cm, place it in 40ml of concentrated hydrochloric acid with a mass fraction of 37%, and ultrasonically wash it for 10 minutes, and wash the NiO layer; Then use deionized water to rinse the surface acid, place it in deionized water and clean it for 10 minutes, and finally use ethanol solution ultrasonic cleaning for 10 minutes to remove the surface organic matter, and obtain the finished foamed nickel block; 2mmol mass fraction of 10% Co ( NO) 3 6H 2 O, 8mmol mass fraction of 20% NH 4 F and 10mmol mass fraction are 70% CO(NH 2 ) 2 Dissolve in 36mL deionized wat...

Embodiment 2

[0031] The material used for the lithium-sulfur battery current collector is Ni with a one-dimensional nano-array structure 0.25 co 0.75 (OH) 2 nanoscale materials.

[0032] The preparation method of the current collector material for lithium-sulfur batteries comprises the following steps:

[0033] (1) Preparation of basic cobalt-nickel carbonate nanowire array: first, the foam is cut into a block with a size of 3 × 3 cm, placed in 50 ml of concentrated hydrochloric acid with a mass fraction of 37%, and ultrasonically washed for 15 minutes, and the NiO layer is washed clean; Then use deionized water to rinse the surface acid, place it in deionized water and clean it for 15 minutes, and finally use ethanol solution ultrasonic cleaning for 15 minutes to remove surface organic matter, and obtain the foamed nickel block that has been processed; 2mmol mass fraction is 5% Co ( NO) 3 6H 2 O, 8mmol mass fraction of 15% NH 4 F and 10mmol mass fraction are 60% CO(NH 2 ) 2 Dissol...

Embodiment 3

[0037] The material used for the lithium-sulfur battery current collector is Ni with a one-dimensional nano-array structure 0.25 co 0.75 (OH) 2 nanoscale materials.

[0038] The preparation method of the current collector material for lithium-sulfur batteries comprises the following steps:

[0039] (1) Preparation of basic cobalt-nickel carbonate nanowire array: first cut the foam into a block with a size of 3 × 2cm, place it in 40ml of concentrated hydrochloric acid with a mass fraction of 37%, and ultrasonically wash it for 20 minutes, and wash the NiO layer; Then use deionized water to clean the surface acid, place it in deionized water and clean it for 20 minutes, and finally use ethanol solution ultrasonic cleaning for 20 minutes to remove surface organic matter, and obtain the finished nickel foam block; 2mmol mass fraction of 15% Co ( NO) 3 6H 2 O, 8mmol mass fraction of 25% NH 4 F and 10mmol mass fraction are 80% CO(NH 2 ) 2 Dissolve in 36mL deionized water to ...

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Abstract

The invention belongs to the technical field of lithium-sulfur batteries, and particularly relates to a material for a lithium-sulfur battery current collector and a preparation method thereof. The material is a Ni0.25Co0.75(OH)2 nano multistage material. The material is the Ni0.25Co0.75(OH)2 nano multistage material with a one-dimensional nano array structure, and can provide a large enough specific surface, enough ion diffusion channels and enough electron transmission channels.

Description

technical field [0001] The invention belongs to the technical field of lithium-sulfur batteries, and in particular relates to a material for a current collector of a lithium-sulfur battery and a preparation method thereof. Background technique [0002] Since its invention in 1992, lithium-ion batteries have been widely used in the field of energy storage due to their advantages such as high energy density, small self-discharge, and no memory effect. However, with the advancement of science and technology, especially the rapid development of electric vehicles and portable electronic devices, energy storage devices are urgently required to have the characteristics of small size, large capacity, light weight, and flexible bending. However, currently used lithium-ion secondary battery cathode materials are mainly lithium iron phosphate and nickel-cobalt-manganese ternary materials, and their theoretical specific capacities do not exceed 200mAh / g, making it difficult to increase ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66C01G53/00B82Y30/00
CPCH01M4/66B82Y30/00C01G53/00C01P2004/16C01P2004/03Y02E60/10
Inventor 张新张晓敏
Owner INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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