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Novel negative electrode material of sodium ion battery as well as preparation and application thereof

A technology of sodium ion battery and negative electrode material, applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems of low Coulomb efficiency in the first cycle, low material specific capacity, large volume expansion, etc.

Active Publication Date: 2020-07-17
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantages are also obvious, the specific capacity of the material is low and the first-cycle Coulombic efficiency is very low
The advantages of alloying reaction mechanism materials are high specific capacity and low output voltage, and the disadvantage is severe volume expansion (>300%) during cycling
The conversion mechanism materials are mainly some oxides, sulfides, and phosphides. The advantage is high specific capacity, and the disadvantages are: poor conductivity and large volume expansion

Method used

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  • Novel negative electrode material of sodium ion battery as well as preparation and application thereof
  • Novel negative electrode material of sodium ion battery as well as preparation and application thereof
  • Novel negative electrode material of sodium ion battery as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 4.5g FeC 2 o 4 2H 2 O and 2.0 g H 3 BO 3 Add appropriate amount of deionization and alcohol to the mortar while grinding to make the grinding fully. The grinding time should be more than 2 hours. After grinding, it should be less than 300 meshes. The material is placed in a corundum crucible, air is passed into the tube furnace at a flow rate of 150ml / min, and the material is placed in the tube furnace at a rate of 5 °C / min to 700 °C for sintering for 10 hours, and then cooled naturally for 100 After washing three times with deionized water at ℃, excess boron oxide was removed, and then the obtained product was dried in an oven at 80 ℃ for 24 hours to obtain FeBO 3 Material.

Embodiment 2

[0035] 2.25g FeC 2 o 4 2H 2 O and 1.87 g NH 4 HB 4 o 7 ·3H 2 O is added into the mortar and ground thoroughly, and the grinding steps and drying process are the same as in Example 1. Air is passed into the tube furnace at a flow rate of 200ml / min and the material is placed in the tube furnace to rise to Sintered at 650°C for 12h, then cooled naturally, washed three times with deionized water at 90°C, and dried in an oven at 90°C for 24h to obtain FeBO 3 Material.

Embodiment 3

[0037] 9.66g C 4 h 6 o 4 Fe and 2.3g B 2 o 3 Add in the mortar and grind fully, the grinding steps and drying process are the same as in Example 1, and the air is passed into the tube furnace at a flow rate of 120ml / min and the material is placed in the tube furnace to rise to 700°C at a heating rate of 4°C / min. ℃ sintering for 9 hours, then naturally cooled, washed three times with deionized water at 100 ℃, and dried in an oven at 100 ℃ for 24 hours to obtain FeBO 3 Material.

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Abstract

The invention discloses a novel negative electrode material of a sodium ion battery as well as preparation and application of the novel negative electrode material. A preparation process comprises steps: uniformly mixing an iron source and a boron source, and sintering to obtain the negative electrode material for the sodium ion battery, wherein the iron source comprises one or more of ferrous oxalate, ferrous acetate, ferrous citrate, ferric nitrate and ferric sulfate, and the boron source comprises one or more of boric acid, ammonium borate and diboron trioxide. The negative electrode material FeBO3 has the advantages of low raw material price, simple required equipment, less energy consumption for generating the FeBO3 material, short required time, high material purity and the like, isexcellent in electrochemical performance, and meets the requirements of high specific capacity, low cost and environmental protection of the negative electrode material of the sodium ion battery.

Description

technical field [0001] The invention belongs to the technical field of chemical power sources, and in particular relates to a novel negative electrode material of a sodium ion battery and its preparation and application. Background technique [0002] Fossil energy is currently the most widely used energy source for human beings. However, with the increasing depletion of fossil energy, the environmental pollution and greenhouse effect caused by burning fossil energy are becoming more and more serious, which seriously restricts the future development of the world and human progress. Therefore, countries all over the world vigorously develop clean and renewable energy such as wind energy, solar energy, water energy, tidal energy, etc., but due to their own intermittent characteristics, the generated electric energy cannot be directly transmitted to the grid, otherwise it will have an impact on the grid. Therefore, large-scale and efficient energy storage technologies are requir...

Claims

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Application Information

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IPC IPC(8): C01B35/12H01M4/58H01M10/054
CPCC01B35/127H01M4/5825H01M10/054H01M2004/027H01M2004/021Y02E60/10
Inventor 王保峰吴宝柱吴茜凯汪浩立庄强强
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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