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A carbon-coated titanium-manganese-manganese-phosphate composite material and its preparation method and application in sodium-ion batteries

A composite material and carbon coating technology, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of environmental safety side effects, environmental and human hazards, and low crustal abundance, so as to improve crystal integrity and improve packaging Coverage uniformity, high power density effect

Active Publication Date: 2020-05-05
湖南钠邦新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sodium vanadium phosphate positive electrode material has a working voltage of 3.4V, but due to the harmful effect of pentavalent vanadium on the environment and human body, large-scale application has non-negligible side effects on environmental safety, and the price of vanadium source is lower than that of manganese and titanium sources. Expensive, low crustal abundance, few raw material sources

Method used

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  • A carbon-coated titanium-manganese-manganese-phosphate composite material and its preparation method and application in sodium-ion batteries
  • A carbon-coated titanium-manganese-manganese-phosphate composite material and its preparation method and application in sodium-ion batteries
  • A carbon-coated titanium-manganese-manganese-phosphate composite material and its preparation method and application in sodium-ion batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment includes the following steps:

[0041] Step (1): This embodiment design generates 0.03mol target product Na 3 MnTi(PO 4 ) 3 / C composite material, 0.045mol sodium oxalate, 0.09mol ammonium dihydrogen phosphate, 0.03mol titanium dioxide, 0.03mol manganese dioxide, 1.45g glucose, add 1400g zirconia ball milling beads, and add a certain amount of acetone as the grinding medium;

[0042] Step (2): Ball milling at 800r / min for 12 hours, placed in an oven at 80°C for drying, crushed and ground, and passed through a 200-mesh sieve to obtain Na 3 MnTi(PO 4 ) 3 / C composite material precursor;

[0043] Step (3): The precursor obtained in step (2) is sintered at 350°C for 6 hours in a high-purity argon atmosphere, and then heated to 650°C for 12 hours at a heating rate of 5°C / min. Na can be obtained after natural cooling 3 MnTi(PO 4 ) 3 / C composite material;

[0044] The sodium ion battery composite positive electrode material prepared in this example is...

Embodiment 2

[0049] This embodiment includes the following steps:

[0050] Step (1): This embodiment design generates 0.03mol target product Na 3 MnTi(PO 4 ) 3 / C composite material, 0.047mol sodium oxalate, 0.09mol ammonium dihydrogen phosphate, 0.03mol titanium dioxide, 0.03mol manganese dioxide, 1.45g glucose, 1400g zirconia ball milling beads were added, and a certain amount of acetone was added as the grinding medium;

[0051] Step (2): ball mill at 1000r / min for 24 hours, place in an oven at 80°C to dry, crush and grind and pass through a 100-400 mesh sieve to obtain Na 4 MnTi(PO 4 ) 3 / C composite material precursor;

[0052] Step (3): The precursor obtained in step (2) is sintered at 350°C for 6 hours in a high-purity argon atmosphere, and then heated to 750°C for 12 hours. The heating rate is 5°C / min, and Na can be obtained after natural cooling. 3 MnTi(PO 4 ) 3 / C composite material;

[0053] The battery assembly and test method of the material obtained in this embodimen...

Embodiment 3

[0055] This embodiment includes the following steps:

[0056] Step (1): This embodiment design generates 0.03mol target product Na 3 MnTi(PO 4 ) 3 / C composite material, add 0.043mol sodium oxalate, 0.09mol ammonium dihydrogen phosphate, 0.03mol titanium dioxide, 0.03mol manganese dioxide, 1.45g starch, add 1400g zirconia ball milling beads, and add a certain amount of acetone as the grinding medium;

[0057] Step (2): Ball milling at a speed of 1600r / min for 48 hours, placed in an oven at 80°C for drying, crushed and ground, and passed through a 100-400 mesh sieve to obtain Na 4 MnTi(PO 4 ) 3 / C composite material precursor;

[0058] Step (3): The precursor obtained in step (2) is sintered at 400°C for 8 hours in a high-purity argon atmosphere, and then sintered at 700°C for 18 hours. The heating rate is 5°C / min, and Na can be obtained after natural cooling. 3 MnTi(PO 4 ) 3 / C composite material;

[0059] The battery assembly and test method of the material obtained ...

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Abstract

The invention discloses a Na3MnTi(PO4)3 / C composite material, a preparation method and an application thereof in a sodium-ion battery. The composite material is composed of carbon coated Na3MnTi(PO4)3 particles. The preparation method comprises the following steps: utilizing an organic matter as a reducing agent and a carbon source, taking low-cost manganese source and titanium source as raw materials and adopting a solid phase method for synthesizing a carbon coated Na3MnTi(PO4)3 composite anode material with an excellent performance. The preparation method is simple and practicable, the condition is mild and the yield is high. When the prepared composite material is used as an anode material of the sodium-ion battery, the anode material shows high energy density, high working voltage, excellent circulatory stability and excellent rate capability.

Description

technical field [0001] The present invention relates to a kind of sodium ion cathode material, particularly to a kind of carbon-coated Na 3 MnTi(PO 4 ) 3 Formed composites and solid phase synthesis of Na 3 MnTi(PO 4 ) 3 / C method, and Na 3 MnTi(PO 4 ) 3 The application of / C as a sodium ion cathode material belongs to the field of sodium ion batteries. Background technique [0002] As lithium-ion batteries have achieved rapid development in the field of 3C products and electric vehicles, and have shown good development prospects, due to the lack of metal lithium resources in the earth's crust, lithium-ion batteries are difficult to meet in the field of large-scale energy storage. For large-scale applications, its manufacturing cost will also show a rising trend with the shortage of lithium resources. Compared with lithium, sodium is abundant in the earth's crust and has a wider source, and sodium and lithium are in the same main group in the periodic table, so they ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/054
CPCH01M4/366H01M4/5825H01M4/62H01M4/625H01M10/054Y02E60/10
Inventor 张治安赖延清陈晓彬尚国志李煌旭肖志伟
Owner 湖南钠邦新能源有限公司
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