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Fluorine-doped carbon-coated manganese oxide synthetic method and application thereof

A synthesis method and manganese oxide technology, which is applied in the field of lithium ion capacitors, can solve the problems that the electrochemical performance cannot be better satisfied, and achieve the effects of good control, simple operation, and simple preparation process

Inactive Publication Date: 2017-11-17
武汉纽赛儿科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, lithium-ion capacitors generally use materials such as graphite as the negative electrode, and their electrochemical performance cannot better meet the above requirements.

Method used

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  • Fluorine-doped carbon-coated manganese oxide synthetic method and application thereof
  • Fluorine-doped carbon-coated manganese oxide synthetic method and application thereof

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preparation example Construction

[0021] The synthesis method of fluorine-doped carbon-coated manganese oxide is characterized in that: the method uses Nafion solution and manganese acetate solution as main raw materials, and comprises the following steps:

[0022] 1) Slowly add manganese acetate solution dropwise to the Nafion solution and stir, adjust the pH to 6.5~7.5 with NaOH isopropanol solution, and let the resulting mixture stand for a full reaction;

[0023] 2), drying the reaction solution to obtain a solid product, and roasting the obtained solid product at high temperature;

[0024] 3), naturally cool the solid product after high-temperature roasting to room temperature to obtain fluorine-doped carbon-coated manganese oxide;

[0025] The mass percentage of manganese oxide in the final fluorine-doped carbon-coated manganese oxide is 30-50%.

[0026] In the step 1), the stirring time is preferably controlled at more than 1 hour; during the standing reaction of the obtained mixed solution, the pH val...

Embodiment 1

[0030] 1) Take an appropriate amount of Nafion solution, slowly add manganese acetate solution dropwise into the Nafion solution and stir, stir for 1 hour, adjust the pH value to 6.5 with NaOH isopropanol solution, and let the resulting mixture stand for 8 hours to fully react;

[0031] 2) Dry the reaction liquid to obtain a solid product, and roast the obtained solid product at a high temperature, the drying temperature is controlled at 50°C, the drying time is controlled at 8h, and the high-temperature roasting is heated to 800°C at a heating rate of 5°C / min, and roasted for 2.5h;

[0032] 3) Insulate the solid product calcined at high temperature for 1 hour, and then naturally cool to room temperature to obtain fluorine-doped carbon-coated manganese oxide;

[0033] The consumption of Nafion and manganese acetate must ensure that the mass percentage of manganese oxide in the final product is at 30%.

[0034] According to visual inspection, the fluorine-doped carbon-coated ma...

Embodiment 2

[0036] 1) Take an appropriate amount of Nafion solution, slowly add manganese acetate solution dropwise into the Nafion solution and stir, stir for 1.5 hours, adjust the pH value to 6.8 with NaOH isopropanol solution, and let the resulting mixture stand for 9 hours to fully react;

[0037] 2) Dry the reaction solution to obtain a solid product, and roast the obtained solid product at a high temperature. The drying temperature is controlled at 60°C, and the drying time is controlled at 10h. The high-temperature roasting adopts a heating rate of 5°C / min to raise the temperature to 850°C, and roast for 3h;

[0038] 3) Insulate the solid product after high-temperature roasting for 1.5 hours, and then naturally cool to room temperature to obtain fluorine-doped carbon-coated manganese oxide;

[0039] The consumption of Nafion and manganese acetate must ensure that the mass percentage of manganese oxide in the final product is at 35%.

[0040] According to visual inspection, the fluo...

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Abstract

The invention discloses a fluorine-doped carbon-coated manganese oxide synthetic method, and the method takes Nafion solution and manganese acetate solution as the main raw materials, and employs a mode of first mixing reaction and second high-temperature carbonization for preparation. The mass percentage of manganese oxide in the final fluorine-doped carbon-coated manganese oxide is 30-50%. The fluorine-doped carbon-coated manganese oxide is taken as an electrode material of a lithium-ion capacitor. When the fluorine-doped carbon-coated manganese oxide is taken as the electrode material, the volume effect of the electrode material can be controlled in a better way, and the conductive performances, charging and discharging performances and circulating performances of the capacitor are remarkably improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion capacitors, in particular to a synthesis method and application of fluorine-doped carbon-coated manganese oxide. Background technique [0002] Lithium ion capacitor (LIC) can be said to be a hybrid capacitor of lithium ion rechargeable battery (LIB) and electric double layer capacitor (EDLC). The positive electrode is generally made of activated carbon, and the negative electrode is generally made of graphite and other materials. It is more stable than lithium-ion rechargeable batteries, and exceeds the electrical performance of electric double layer capacitors, with less thermal breakdown and aging, and less self-discharge. The characteristic of lithium ion capacitors is that they have the same charging speed as electric double layer capacitors EDLC, but their energy density is higher than that of EDLC. The cycle characteristics of charging and discharging are better, and the capacity is onl...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/46H01G11/32H01G11/50H01G11/86
CPCY02E60/13H01G11/30H01G11/32H01G11/46H01G11/50H01G11/86
Inventor 闻涛聂振耘
Owner 武汉纽赛儿科技股份有限公司
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