Zirconium doped porous carbon material and preparation method for preparing lithium ion capacitor battery composite positive electrode

A porous carbon material and composite positive electrode technology, which is applied in the preparation/purification of carbon, hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, etc., can solve problems such as capacity fading, reduce direct contact, and improve electrochemical cycle stability Sexuality and multiplier, the effect of reducing side effects

Inactive Publication Date: 2019-08-30
NINGBO CRRC NEW ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lithium manganese oxide is widely used in electric bicycles, electric vehicles and other fields due to its low price, stability, and good electrical conductivity, but it also has the problem of capacity attenuation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] This example is a preparation example of zirconium-doped porous carbon material, specifically:

[0046] Activated carbon (PCT from South Korea, with a particle size range of 1-20 μm and an average particle size of 5.5 μm) was ultrasonically cleaned with water and absolute ethanol in sequence, and 0.2 mol / L Zr(NO 3 ) 4 The solution is made into a suspension, and then 0.4mol / L NaOH solution is added to adjust the pH value to 8.0. After standing for 24 hours, the supernatant is removed, washed with absolute ethanol, and vacuum-dried to obtain nano-Zr(OH) 4 encapsulated porous carbon material;

[0047] Then in an Ar atmosphere, heat to 87°C at a heating rate of 9°C / min, hold for 40 minutes, then heat to 430°C at a heating rate of 16°C / min, and hold for 45 minutes to obtain a zirconium-doped porous carbon material.

Embodiment 2

[0049] This example is a preparation example of zirconium-doped porous carbon material, specifically:

[0050] Activated carbon (PCT from South Korea, with a particle size range of 1-20 μm and an average particle size of 5.5 μm) was ultrasonically cleaned with water and absolute ethanol in sequence, and 0.2 mol / L Zr(NO 3 ) 4 The solution is made into a suspension, and then 0.3mol / L NaOH solution is added to adjust the pH value to 7.5. After standing for 22 hours, the supernatant is removed, washed with absolute ethanol, and vacuum-dried to obtain nano-Zr(OH) 4 encapsulated porous carbon material;

[0051] Then in an Ar atmosphere, heat to 70°C at a heating rate of 8°C / min, hold for 50 minutes, then heat to 420°C at a heating rate of 13°C / min, and hold for 60 minutes to obtain a zirconium-doped porous carbon material.

Embodiment 3

[0053] This example is a preparation example of zirconium-doped porous carbon material, specifically:

[0054] Activated carbon (PCT from South Korea, with a particle size range of 1-10 μm and an average particle size of 3.3 μm) was ultrasonically cleaned with water and absolute ethanol in sequence, and 0.3 mol / L Zr(NO 3 ) 4 The solution is made into a suspension, and then 0.5mol / L NaOH solution is added to adjust the pH value to 8.0. After standing for 24 hours, the supernatant is removed, washed with absolute ethanol, and vacuum-dried to obtain nano-Zr(OH) 4 encapsulated porous carbon material;

[0055] Then in an Ar atmosphere, heat to 100°C at a heating rate of 10°C / min, hold for 20 minutes, then heat to 450°C at a heating rate of 20°C / min, and hold for 30 minutes to obtain a zirconium-doped porous carbon material.

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Abstract

The invention relates to the technical field of lithium ion batteries and supercapacitors, particularly to a zirconium doped porous carbon material and a preparation method for preparing a lithium ioncapacitor battery composite positive electrode, wherein the surface of a porous carbon material is uniformly coated with a layer of nanometer Zr(OH)4 particles through a co-precipitation method, andthen heating and thermal insulation is performed in a protective atmosphere to prepare the zirconium doped porous carbon material. The preparation method for preparing a lithium ion capacitor batterycomposite positive electrode by using the zirconium doped porous carbon material comprises: (1) uniformly mixing a lithium battery positive electrode material, an electric conduction agent and the zirconium doped porous carbon material to obtain a mixed active substance; and (2) coating a current collector with the mixed active substance to obtain the composite positive electrode. According to thepresent invention, with the application of the zirconium doped porous carbon material in the preparation of the lithium ion capacitor battery composite positive electrode, the electrochemical performance and the safety performance of the capacitor battery can be improved.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries and supercapacitors, in particular to a zirconium-doped porous carbon material and a method for preparing a lithium-ion composite positive electrode for supercapacitors using the zirconium-doped porous carbon material. Background technique [0002] Lithium-ion battery is a green secondary battery with high energy density, high average output voltage, low self-discharge and no toxic substances. After nearly two decades of development, the energy density of lithium-ion batteries has reached 100Wh / kg to 150Wh / kg, and the maximum working voltage can reach 4V. Supercapacitor is an energy storage device based on the principle of electric double layer energy storage and the principle of redox quasi-capacitance with high reversibility. It has the advantages of high power density, short charge and discharge time, long cycle life, and wide operating temperature range. Disadvantages such as re...

Claims

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Application Information

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IPC IPC(8): C01B32/354C01B32/05C01B32/168C01B32/194C01G25/02C09C1/56H01G11/32H01G11/26H01G11/50H01G11/86D06M11/46D06M101/40
CPCC01G25/02C09C1/56C01B32/05C01B32/168C01B32/194C01B32/354D06M11/46D06M2101/40H01G11/26H01G11/32H01G11/50H01G11/86Y02E60/13
Inventor 袁峻乔志军齐洪峰
Owner NINGBO CRRC NEW ENERGY TECH CO LTD
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