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Method for preparing three-dimensional composite electrode materials by growing layered metal sulfides with hierarchical structure on three-dimensional graphene framework

A technology of graphene skeleton and graphene electrode, which is applied in the direction of nanotechnology for materials and surface science, battery electrodes, structural parts, etc., can solve the problem of small specific capacity of battery negative electrode materials, achieve improved cycle stability, and improve Performance, the effect of reducing volume expansion

Active Publication Date: 2018-08-14
内蒙古元瓷新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the specific capacity of the existing battery negative electrode material is small, and to provide a method for preparing a three-dimensional composite electrode material by growing layered metal sulfides with a hierarchical structure on a three-dimensional graphene skeleton

Method used

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  • Method for preparing three-dimensional composite electrode materials by growing layered metal sulfides with hierarchical structure on three-dimensional graphene framework
  • Method for preparing three-dimensional composite electrode materials by growing layered metal sulfides with hierarchical structure on three-dimensional graphene framework
  • Method for preparing three-dimensional composite electrode materials by growing layered metal sulfides with hierarchical structure on three-dimensional graphene framework

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specific Embodiment approach 1

[0037] Embodiment 1: This embodiment is a method for preparing a three-dimensional composite electrode material by growing a layered metal sulfide with a hierarchical structure on a three-dimensional graphene skeleton, and it is completed in the following steps:

[0038] 1. Preparation of flexible three-dimensional graphene electrode materials:

[0039] ①. Immerse the nickel foam in the hydrochloric acid solution with a mass fraction of 5% to 10% for 10min to 20min to obtain the nickel foam soaked in the hydrochloric acid solution; first use deionized water to clean the nickel foam soaked in the hydrochloric acid solution for 1 to 3 times , and then use absolute ethanol to wash 1 to 3 times to obtain the cleaned foamed nickel; place the cleaned foamed nickel in the CVD furnace tube, and then simultaneously pass CH into the CVD furnace tube 4 、H 2 and Ar, and then the CVD furnace tube was raised from room temperature to 1000-1100°C at a rate of 10°C / min-20°C / min, and then kept...

specific Embodiment approach 2

[0060] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: the size of the nickel foam described in step ① is 10cm×5cm×0.1cm. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0061] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is: the CH input described in step 1. 4 The gas flow rate is 50 sccm. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a method for preparing a three-dimensional composite electrode material by using a layered metal sulfide with a hierarchical structure grown on a three-dimensional graphene skeleton, relates to a preparation method of an electrode material, and aims at solving the problem of small specific capacity of an existing battery negative electrode material. The method comprises the steps of (1) preparing a flexible three-dimensional graphene electrode material; (2) preparing a flake sulfide array grown on the three-dimensional graphene skeleton; and (3) adding absolute ethyl alcohol to a mixed solution of stannic chloride and thioacetamide, containing the flake sulfide array grown on the three-dimensional graphene skeleton in the step (2), carrying out drying to obtain a flexible graphene electrode with the three-dimensional hierarchical structure and carrying out cleaning and drying. The prepared three-dimensional composite electrode material has excellent sodium storage property, the sodium storage capacity at low magnification is greater than 900mA h / g, the initial coulomb efficiency is greater than 90%; the three-dimensional composite electrode material can be stably kept over 200 cycles; and the method is suitable for preparation of the three-dimensional composite electrode material.

Description

technical field [0001] The invention relates to a preparation method of an electrode material. Background technique [0002] The storage and conversion of energy has become an important issue restricting the sustainable development of the world economy. Among the current various technologies, lithium-ion batteries have conquered the portable electronics market due to their advantages such as high working voltage, high capacity, small self-discharge and long cycle life, and have become the primary power source for electric vehicles and large-scale energy storage systems. choose. However, as industries such as digital and transportation rely more heavily on lithium-ion batteries, limited lithium resources will inevitably face shortages. The research and development of sodium-ion batteries can alleviate the limited development of batteries caused by the shortage of lithium resources to a certain extent. Compared with lithium-ion batteries, sodium-ion batteries have four outs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/054B82Y30/00
CPCB82Y30/00H01M4/366H01M4/5815H01M4/625H01M10/054Y02E60/10
Inventor 刘晓旭晁栋梁申泽骧朱昌荣
Owner 内蒙古元瓷新材料科技有限公司