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Three-dimensional mesh wall-shaped all-solid-state lithium ion battery negative electrode, preparation method and battery

A lithium-ion battery, three-dimensional mesh technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as lack of promotion value, achieve good cycle performance, high capacity, and solve the effect of volume effect

Active Publication Date: 2020-11-06
湖南恩捷前沿新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Papers have reported the preparation of Sb by vacuum thermal evaporation 2 S 3 Applied to solar cells, but the prepared Sb 2 S 3 Most of them are amorphous and amorphous, without nanometer and three-dimensional morphology, so they have no promotion value

Method used

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  • Three-dimensional mesh wall-shaped all-solid-state lithium ion battery negative electrode, preparation method and battery
  • Three-dimensional mesh wall-shaped all-solid-state lithium ion battery negative electrode, preparation method and battery
  • Three-dimensional mesh wall-shaped all-solid-state lithium ion battery negative electrode, preparation method and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Antimony sulfide powder with a purity of 99% is used as the evaporation source, the conductive current collector of stainless steel foil is used as the deposition substrate, and the evaporation chamber is evacuated to 1×10 -4 Pa, turn on the evaporation power supply, adjust the current from 0 to 1.5A at a speed of 0.1A / s, and turn off the evaporation power supply after evaporating for 10 minutes. Among them, the antimony sulfide powder is heated evenly by slowly adjusting the current, thereby obtaining uniform Sb on the conductive current collector. 2 S 3 film.

[0024] Please refer to figure 1 , it can be confirmed by X-ray diffraction that the material prepared by the above method is pure Sb 2 S 3 crystals.

[0025] Morphology was determined by scanning electron microscopy, see figure 2 and image 3 , it can be found that the film is composed of vertical wall-like Sb 2 S 3 The nanosheets are connected to form a network, and the overall shape is like a honeyc...

Embodiment 2

[0028] Using stibnite as the evaporation source, the conductive current collector of titanium foil as the deposition substrate, and the evaporation chamber was evacuated to 0.8×10 - 3 Pa, turn on the evaporation power supply, adjust the current from 0 to 30A at a speed of 0.2A / s, and turn off the evaporation power supply after evaporating for 20 minutes.

[0029] Determining the morphology by scanning electron microscopy, it can be found that the film is composed of vertical wall-like Sb 2 S 3 The nanosheets are connected to form a network, and the overall shape is like a honeycomb, and each piece of Sb 2 S 3 The thickness of the nano wall is 30nm-70nm, and the length is 0.8um-2um.

[0030] The electrochemical performance test of the thin film negative electrode of the present invention adopts lithium sheet as counter electrode and reference electrode, and electrolytic solution is 1M LiPF 6 +EC / DEC / DMC (1:1:1, v / v / v), using Celgard 2032 separator, assembled into CR2032 bu...

Embodiment 3

[0032] with Sb 2 S 3 The recovered product is the evaporation source, the conductive collector of nickel foam is the deposition substrate, and the evaporation chamber is evacuated to 0.8×10 -3 Pa, turn on the evaporation power supply, adjust the current from 0 to 10A at a speed of 0.08A / s, and turn off the evaporation power supply after evaporating for 50s. It should be noted that Sb 2 S 3 Impurities in the recovered product were not evaporated onto the deposition substrate at a current of 10A.

[0033] Determining the morphology by scanning electron microscopy, it can be found that the film is composed of vertical wall-like Sb 2 S 3 The nanosheets are connected to form a network, and the overall shape is like a honeycomb, and each piece of Sb 2 S 3 The thickness of the nano wall is 15nm-30nm, and the length is 1um-2um.

[0034] The electrochemical performance test of the thin film negative electrode of the present invention adopts lithium sheet as counter electrode an...

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Abstract

The invention discloses a cathode of a cellular three-dimensional net wall-shaped all-solid-state film lithium ion battery, a preparation method, and an all-solid-state film lithium ion battery. The cathode of the all-solid-state film lithium ion battery is formed by connecting vertical wall-shaped Sb2S3 nanosheets into a net; the whole cathode is a cellular film; the thickness of each Sb2S3 nanometer wall is 10nm-100nm, and the length is 0.5-3 um. By adoption of the cathode provided by the technical scheme of the invention, the Sb2S3 with the cellular three-dimensional net wall-shaped structure has excellent performance, high capacity and high capacity retention ratio in the cycle process; the preparation method of the vacuum thermal evaporation method requires simple equipment; and, thetechnology is easy to realize, can perform continuous film coating, and can be applied industrially.

Description

technical field [0001] The invention relates to a honeycomb-like three-dimensional network wall-shaped all-solid-state thin-film lithium-ion battery negative electrode, a preparation method and an all-solid-state thin-film lithium-ion battery, belonging to the technical field of lithium-ion batteries. Background technique [0002] As one of the key development directions of next-generation lithium batteries, all-solid-state lithium batteries have the advantages of safety, high energy and power, and are more and more favored by academia and industry. According to the different properties of the electrolyte, it can be divided into polymer solid-state lithium battery, inorganic solid-state lithium battery and composite solid-state lithium battery. This type of battery will be mainly used in large-scale energy storage, power vehicles, aircraft, aerospace, military industry and other fields. At the same time, thin-film all-solid-state lithium batteries are also one of the researc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/136H01M4/1397H01M4/58H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/136H01M4/1397H01M4/5815H01M10/0525Y02E60/10
Inventor 刘芳洋汪齐王麒羽吴杰蒋良兴贾明赖延清李劼刘业翔
Owner 湖南恩捷前沿新材料科技有限公司
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