Preparation method of nickel ion doped cobalt sulfide/conductive substrate composite material

A technology of conductive substrates and composite materials, applied in nanotechnology, circuits, electrical components, etc. for materials and surface science, can solve the problems of low rate performance, poor cycle stability, etc., achieve high rate performance, promote deposition, good Effects of Cyclic Stability

Active Publication Date: 2016-02-03
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problems of poor cycle stability and low rate performance of existing negative electrode materials for lithium-ion batteries, and provides a method for preparing a nickel ion-doped cobalt sulfide / conductive substrate composite material

Method used

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  • Preparation method of nickel ion doped cobalt sulfide/conductive substrate composite material
  • Preparation method of nickel ion doped cobalt sulfide/conductive substrate composite material
  • Preparation method of nickel ion doped cobalt sulfide/conductive substrate composite material

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specific Embodiment approach 1

[0016] Specific embodiment one: the preparation method of a kind of nickel ion-doped cobalt sulfide / conductive substrate composite material of this embodiment, specifically is carried out according to the following steps:

[0017] 1. Add the substrate into the acid solution or alkali solution, control the temperature at 25-80°C, and treat for 2-8 hours;

[0018] 2. Add cobalt salt and nickel salt to the solvent, mix evenly, then add sulfur source, stir for 0.5-3 hours to obtain a mixed solution; wherein, the mass ratio of cobalt salt to nickel salt is (15-2): 1, and the solvent The mass ratio with cobalt salt is (200~50):1, and the mass ratio between cobalt salt and sulfur source is (5~0.3):1;

[0019] 3. Add the substrate treated in step 1 to the mixed solution obtained in step 2, and then solvothermally treat it to obtain a precursor;

[0020] 4. The precursor obtained in step 3 is heat-treated in a heat-treatment atmosphere to obtain a nickel ion-doped cobalt sulfide / condu...

specific Embodiment approach 2

[0021] Embodiment 2: This embodiment differs from Embodiment 1 in that: in step 1, the substrate is carbon fiber paper, carbon fiber cloth, carbon nanotube cloth, titanium sheet or nickel foam. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0022] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: acid solution is the mixing of one or more in hydrochloric acid solution, sulfuric acid solution and nitric acid solution in step one, and the mass concentration of acid solution is 5-25%. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method of a nickel ion doped cobalt sulfide/conductive substrate composite material. The preparation method of the nickel ion doped cobalt sulfide/conductive substrate composite material relates to the technical field of lithium ion batteries, and aims to solve the technical problem that the negative material of an existing lithium ion battery is poor in cycling stability and low in rate capability. The method comprises the following steps of (1) treating a substrate; (2) preparing a solution; (3) preparing a precursor; (4) heat treating. The electrode material prepared by the invention can be used as the negative material to be directly assembled to form the lithium ion battery. The electrode material is directly used as an electrode without adding any conductive agent and binding agent. The electrode preparation process is simplified, the preparation cost is reduced, and the capacity, the power density performance and the cycling stability of the battery are improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries. Background technique [0002] With the rapid development of the economy, the world's energy consumption has increased sharply. The serious energy crisis has prompted all countries to devote themselves to the research, development and utilization of new energy, such as wind energy, solar energy and biomass energy. The storage problem urgently needs to be solved. It prompted people to start research on lithium secondary batteries. Lithium-ion batteries are widely used in the field of energy storage for these new energy sources due to their excellent characteristics such as high energy density, good cycle performance, long service life and green sustainability. Nowadays, lithium-ion batteries will also have wider application and development prospects in the field of mobile electronic terminal equipment such as mobile phones, digital cameras, notebook computers and electric vehicles. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/5815H01M10/0525Y02E60/10
Inventor 付宏刚赵丽王蕾佟苗苗冯贺刁忠伟
Owner HEILONGJIANG UNIV
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