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High-rate composite negative electrode material of sodium ion battery and preparation method thereof

A technology of sodium ion battery and negative electrode material, applied in battery electrodes, negative electrodes, secondary batteries and other directions, can solve the problems of cumbersome preparation process, difficult to scale up, serious pollution, etc., and achieves simple operation process, low equipment requirements, The effect of high sodium storage capacity

Active Publication Date: 2021-05-11
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems of cumbersome preparation process, high cost, serious pollution and difficulty in scale-up existing in the preparation method of the existing metal compound active nanoparticle / carbon nanotube composite material, and proposes a simple gas phase reaction approach to Realize the preparation of a metal selenide / carbon nanotube composite material with special morphology

Method used

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  • High-rate composite negative electrode material of sodium ion battery and preparation method thereof
  • High-rate composite negative electrode material of sodium ion battery and preparation method thereof
  • High-rate composite negative electrode material of sodium ion battery and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] A preparation method of a high-rate composite negative electrode material for a sodium ion battery, comprising the following steps:

[0028] In the first step, ferrocene and selenium powder with a particle size of 300 microns are used as raw materials, weighed and mixed uniformly according to a mass ratio of 2.5:1, and placed in a closed reaction kettle protected by argon for heating. The heating mechanism is as follows: the temperature is raised to 350°C at a rate of 2°C / min, and the temperature is kept for 1 hour to fully mix the ferrocene and selenium in the form of vapor. Then continue to heat up to 550°C at a rate of 5°C / min, keep the temperature for 4 hours and then cool down to room temperature naturally.

[0029] The second step is to take out the reaction product in the reaction kettle, place it in a tube furnace, and raise the temperature to 700°C at a rate of 5°C / min under an argon atmosphere. The final product obtained after constant temperature for 3 hours ...

Embodiment 2

[0038] A preparation method of a high-rate composite negative electrode material for a sodium ion battery, comprising the following steps:

[0039] In the first step, ferrocene and selenium powder with a particle size of 250 microns are used as raw materials, weighed and mixed uniformly according to a mass ratio of 5:1, and then placed in a closed reaction kettle protected by nitrogen for heating. The heating mechanism is as follows: the temperature is raised to 320°C at a rate of 1°C / min, and the temperature is kept for 2 hours to fully mix the ferrocene and selenium in the form of vapor. Then continue to heat up to 550°C at a rate of 3°C / min, keep the temperature for 1 hour, and cool down to room temperature naturally.

[0040] The second step is to take out the reaction product in the reaction kettle, place it in a tube furnace, and raise the temperature to 500°C at a rate of 2°C / min under a nitrogen atmosphere, and the final product obtained after constant temperature for ...

Embodiment 3

[0042] In the first step, ferrocene and selenium powder with a particle size of 50 microns are used as raw materials, weighed and mixed uniformly according to a mass ratio of 1:1, and placed in a closed reaction kettle protected by helium for heating. The heating mechanism is as follows: the temperature is raised to 400°C at a rate of 3°C / min, and the temperature is kept for 0.5h to fully mix the ferrocene and selenium in the form of vapor. Then continue to heat up to 450°C at a rate of 6°C / min, keep the temperature for 3 hours and then cool down to room temperature naturally.

[0043] The second step is to take out the reaction product in the reaction kettle, place it in a tube furnace, and raise the temperature to 850°C at a rate of 10°C / min under an argon atmosphere, and the final product obtained after constant temperature for 1 hour is the high-magnification composite Negative material. The sodium ion battery was assembled using the method described in Example 1. The te...

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Abstract

The invention belongs to the technical field of sodium-ion batteries, and particularly relates to a high-rate composite negative electrode material of a sodium-ion battery and a preparation method thereof. The method mainly comprises the following steps: uniformly mixing ferrocene and selenium powder serving as raw materials according to a proper ratio, and heating in a closed reaction kettle protected by inert atmosphere; after a heating mechanism is precisely controlled, performing natural cooling to reach the room temperature; placing the kettle bottom product in a tubular furnace, and carrying out proper heat treatment in an inert atmosphere to obtain the high-rate composite negative electrode material. The method is simple in process route, does not generate waste gas and waste water in the preparation process, and is easy for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of sodium-ion batteries, and in particular relates to a high-rate composite negative electrode material for sodium-ion batteries and a preparation method thereof. Background technique [0002] With the massive consumption of fossil energy and the increasing environmental problems brought about by it, the efficient use of clean energy and the development of renewable energy have attracted widespread attention and attention from all over the world. However, renewable energy such as solar energy, wind energy, and tidal energy are intermittent, and the generated electric energy cannot be stably connected to the grid. Therefore, the development of small power stations based on large-scale energy storage devices has become the key to the effective use of these renewable energy sources. As a high-performance electrochemical energy storage device, lithium-ion batteries have been widely used in consumer electronics s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/054C01B32/16C01B19/04B82Y30/00B82Y40/00
CPCH01M4/366H01M4/581H01M4/625H01M10/054C01B32/16C01B19/007B82Y40/00B82Y30/00H01M2004/027C01P2004/24C01P2004/80C01P2004/32C01P2006/40Y02E60/10
Inventor 赵云张永涛马灿良
Owner SHANXI UNIV
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