A kind of preparation method of 3dpc/co/coo lithium battery negative electrode material

A technology of negative electrode material and composite material, applied in the field of preparation of 3DPC/Co/CoO lithium battery negative electrode material, can solve the problems of poor cycle performance, low conductivity, unstable structure, etc. The effect of structural collapse

Active Publication Date: 2020-10-09
HARBIN UNIV OF SCI & TECH
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  • Summary
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  • Description
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a 3DPC / Co / CoO lithium battery negative electrode material in order to solve the problems of low conductivity of transition metal oxide materials, poor cycle performance and unstable structure at high current density

Method used

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  • A kind of preparation method of 3dpc/co/coo lithium battery negative electrode material
  • A kind of preparation method of 3dpc/co/coo lithium battery negative electrode material
  • A kind of preparation method of 3dpc/co/coo lithium battery negative electrode material

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specific Embodiment approach 1

[0047] Embodiment 1: A method for preparing a 3DPC / Co / CoO lithium battery negative electrode material according to this embodiment is carried out according to the following steps:

[0048] 1. Synthesis of 3D porous carbon 3DPC

[0049] In a tube furnace, feed argon gas to carbonize edible rice flakes, the carbonization temperature is 850-950°C, and the heating rate is 8-12°C / min, to obtain three-dimensional porous carbon 3DPC;

[0050] 2. Synthesis of 3DPC / Co-MOFs precursor materials

[0051] Co(NO 3 ) 2 ·6H 2 O was dissolved in methanol solution and stirred for 10 min to obtain Co(NO 3 ) 2 ·6H 2 O methanol solution; Dimethylimidazole was dissolved in methanol solution and stirred for 10min to obtain dimethylimidazole methanol solution; Co(NO 3 ) 2 ·6H 2 O methanol solution and dimethylimidazole methanol solution were mixed and stirred at a constant rate for 10 min to obtain a mixed solution; the mixed solution and three-dimensional porous carbon 3DPC were added to a ...

specific Embodiment approach 2

[0054] Specific embodiment two: the difference between this embodiment and specific embodiment one is: Co(NO 3 ) 2 ·6H 2 Co(NO 3 ) 2 ·6H 2 The molar ratio of O to 2-MeIM in 2-MeIM methanol solution is 1:20-1:43. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0055] Specific embodiment three: the difference between this embodiment and specific embodiment one is: Co(NO 3 ) 2 ·6H 2 Co(NO 3 ) 2 ·6H 2 The molar ratio of O to 2-MeIM in 2-MeIM methanol solution is 1:30 to 1:40. Others are the same as in the first embodiment.

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Abstract

The invention discloses a preparation method of a 3DPC / Co / CoO lithium battery negative electrode material and relates to a lithium battery negative electrode material. The invention aims to solve theproblems of low conductivity, poor cycle performance under high current density and poor structural stability of a carbon-based composite transition metal oxide material. According to the invention, alow-cost rice carbon biological material is used as a carbon-based material, a 3DPC / Co-MOFs material is synthesized by a solvothermal method, and a precursor material is converted into the 3DPC / Co / CoO composite material by a low-temperature calcination method. Co elementary substance is introduced, so that the conductivity of electrons and ions is improved, the conductivity of the electrode is improved, the electrochemical performance of the composite material is improved, the structural stability is enhanced, and the cycle performance is improved. The method is applied to the field of lithium ion battery negative electrode materials.

Description

technical field [0001] The invention relates to the field of lithium battery negative electrode materials, in particular to a preparation method of a 3DPC / Co / CoO lithium battery negative electrode material. Background technique [0002] Compared with traditional graphite carbon anode materials, transition metal oxides have higher theoretical specific capacity and safety. However, the conductivity of transition metal oxide materials is very low, which is not conducive to the construction of electron transport channels, and the charge transport efficiency is low. During battery cycling, nanoparticles are prone to volume expansion, agglomeration and pulverization. The cycle performance at high current density is poor, and the structural stability and conductivity need to be further improved. Contents of the invention [0003] The purpose of the present invention is to provide a preparation method of a 3DPC / Co / CoO lithium battery negative electrode material in order to solve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M4/52H01M10/0525
CPCH01M4/523H01M4/625H01M4/626H01M4/628H01M10/0525H01M2004/027Y02E60/10
Inventor 郑国旭刘倩张博超齐斌张浩明游伶
Owner HARBIN UNIV OF SCI & TECH
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