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Preparation method of FeOOH@rGO lithium ion battery negative electrode material with hollow tubular structure

A lithium-ion battery, tubular structure technology, applied in battery electrodes, negative electrodes, structural parts, etc., can solve problems such as poor insulation and volume expansion

Active Publication Date: 2020-10-23
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of volume expansion and poor insulation of existing FeOOH negative electrode materials, and to provide a method for preparing a hollow tubular structure FeOOH@rGO lithium ion battery negative electrode material

Method used

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  • Preparation method of FeOOH@rGO lithium ion battery negative electrode material with hollow tubular structure
  • Preparation method of FeOOH@rGO lithium ion battery negative electrode material with hollow tubular structure
  • Preparation method of FeOOH@rGO lithium ion battery negative electrode material with hollow tubular structure

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specific Embodiment approach 1

[0025] Specific Embodiment 1: In this embodiment, a method for preparing a hollow tubular structure FeOOH@rGO lithium-ion battery negative electrode material is implemented according to the following steps:

[0026] 1. The nickel foam is ultrasonically treated with acetone, hydrochloric acid, absolute ethanol and deionized water in sequence, and dried in a vacuum oven to obtain dried nickel foam;

[0027] 2. Graphene oxide is dissolved in deionized water, and ultrasonic treatment is carried out after stirring to obtain an aqueous solution of graphene oxide;

[0028] 3. Immerse the dried nickel foam obtained in step 1 in the graphene oxide aqueous solution obtained in step 2, take it out and dry it, repeat the dipping and drying process three times, and obtain the dried nickel foam-graphene oxide;

[0029] 4. Place the foamed nickel-graphene oxide obtained in step 3 in a tube furnace and calcined under an inert atmosphere to obtain product A;

[0030] 5. Immerse the product A ...

specific Embodiment approach 2

[0036] Embodiment 2: This embodiment differs from Embodiment 1 in that the concentration of hydrochloric acid in Step 1 is 1 mol / L˜5 mol / L. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0037] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the ultrasonic treatment time in Step 1 is 5 minutes to 30 minutes. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a preparation method of a FeOOH@rGO lithium ion battery negative electrode material with a hollow tubular structure, and belongs to the field of preparation of lithium ion battery negative electrode materials. The problems of volume expansion and poor insulativity of an existing FeOOH negative electrode material are solved. The method comprises the steps: 1, pretreating foamed nickel; 2, preparing a graphene oxide aqueous solution; 3, preparing foamed nickel-graphene oxide; 4, calcining the foamed nickel-graphene oxide; and 5, dipping the calcined product in an iron salt solution, washing with water, filtering and drying. According to the lithium ion battery negative electrode material prepared by the method, a hollow structure provides sufficient space for volume expansion, and micron-sized holes increase diffusion of an electrolyte to the electrode material; the three-dimensional cross-linked carbon skeleton provides a conductive network, so that the reactionrate is increased; good circulation stability is realized; the lithium ion transmission path is shortened, and the rate capability is improved. The material is suitable for being used as a lithium ionbattery negative electrode material.

Description

technical field [0001] The invention belongs to the field of preparation of negative electrode materials for lithium ion batteries, and in particular relates to a method for preparing a negative electrode material of a hollow tubular structure FeOOH@rGO lithium ion battery. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, long cycle life and small self-discharge, and have been widely used in portable electronic devices, such as mobile phones, notebook computers, ipods and electric vehicles. Since Japan's Sony Corporation first developed lithium-ion batteries in 1990, it has aroused great interest in academia and industry. [0003] The electrode material is the key factor restricting its performance. At present, the commercialized anode materials use graphite materials, which have a wide range of sources and low prices, but they also have certain defects, such as low specific capacity (372mAh / g) and poor rate performance, which ...

Claims

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Application Information

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IPC IPC(8): C01G49/02C01B32/184H01M4/52H01M4/62H01M10/0525
CPCC01G49/02C01B32/184H01M4/523H01M4/625H01M10/0525H01M2004/021H01M2004/027C01P2002/72C01P2004/03Y02E60/10
Inventor 黄小萧刘冬冬钟博夏龙卫增岩
Owner HARBIN INST OF TECH