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Preparation method of hollow ZnFe2O4 nanometer anode material of lithium ion battery

A lithium-ion battery and anode material technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of material pulverization, cycle performance degradation, changes, etc., to buffer volume expansion and shrinkage, improve contact ability, and high ratio The effect of capacity

Inactive Publication Date: 2015-03-04
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the invention is to solve the existing ZnFe 2 o 4 The phase change of the material structure of the negative electrode material of the lithium-ion battery during the long-term cycle causes a sharp change in the volume of the material, which makes the material pulverized and the cycle performance is greatly reduced. 2 o 4 Preparation method of nano negative electrode material

Method used

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  • Preparation method of hollow ZnFe2O4 nanometer anode material of lithium ion battery
  • Preparation method of hollow ZnFe2O4 nanometer anode material of lithium ion battery
  • Preparation method of hollow ZnFe2O4 nanometer anode material of lithium ion battery

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specific Embodiment approach 1

[0020] Specific implementation mode one: this implementation mode is a lithium-ion battery hollow ZnFe 2 o 4 The preparation method of nano negative electrode material is specifically carried out according to the following steps:

[0021] 1. Preparation of sugar granules: dissolve sugar in water, stir and mix evenly with a magnetic force to obtain a homogeneous mixed sugar solution with a concentration of 0.5mol / L-2.0mol / L, and then spray dry at a temperature of 180°C to obtain sugar granules ;

[0022] 2. Preparation of carbon microspheres: Put the sugar particles in a tube furnace, heat up from room temperature to 500°C at a heating rate of 1°C / min to 3°C / min under nitrogen protection, and then raise the temperature at a heating rate of 0°C under nitrogen protection. 5°C / min~10°C / min from the temperature of 500°C to 700°C~1200°C, and take it out after cooling to room temperature with the furnace to obtain carbon microspheres;

[0023] 3. Preparation of carbon microsphere ...

specific Embodiment approach 2

[0030] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the sugar described in Step 1 is glucose or sucrose. Others are the same as the first embodiment.

specific Embodiment approach 3

[0031] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the zinc source compound described in step 4 is zinc chloride, zinc acetate or zinc sulfate. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of a hollow ZnFe2O4 nanometer anode material of a lithium ion battery, and relates to a preparation method of an anode material of a lithium ion battery. The invention aims to solve the problems that an existing ZnFe2O4 nanometer anode material of a lithium ion battery is powdered and the cycle performance is greatly reduced because the volume of the anode material is rapidly changed due to phase change of a material structure in a long-term cycle process. The preparation method comprises the following steps: 1, preparing sugar particles; 2, preparing carbon microspheres; 3, preparing a carbon microsphere turbid liquid; 4, preparing a zinc-ferric mixed solution; 5, preparing a zinc-ferric-ethylene glycol-urea mixed solution; 6, preparing a blend; 7, preparing nanometer spinel ZnFe2O4 powder; and 8, sintering to obtain the hollow ZnFe2O4 nanometer anode material of the lithium ion battery. The hollow ZnFe2O4 nanometer anode material of the lithium ion battery, prepared by adopting the preparation method, is used as an electrode material of the lithium ion battery.

Description

technical field [0001] The invention relates to a preparation method of a negative electrode material of a lithium ion battery. Background technique [0002] The contradiction between the increasing depletion of non-renewable energy such as oil and coal and the increasing energy demand of human beings, as well as the huge damage to the environment caused by the polluting gases produced by fossil fuels, have led to global warming, raging diseases and frequent natural disasters, prompting people to seek clean Environmentally friendly alternative energy. As an efficient clean energy, lithium-ion batteries have the characteristics of high energy density, no memory effect and strong cycle stability, and have become an indispensable part of a large number of electronic products. More importantly, lithium-ion batteries are extremely It may replace petroleum as a power source for power vehicles. [0003] The design and preparation of negative electrode materials is the key to obta...

Claims

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Application Information

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IPC IPC(8): H01M4/1391
CPCH01M4/1391H01M4/525Y02E60/10
Inventor 廖丽霞方涛陈立钢王明刘光跃
Owner NORTHEAST FORESTRY UNIVERSITY