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Direction control method of surface oxygen functional groups on coal-based hard carbon for sodium-storing cathodes

A surface oxygen and functional group technology, applied in the field of directional regulation of oxygen functional groups on the surface of coal-based hard carbon, can solve the problems of low oxygen functional group loading efficiency and waste liquid pollution, and achieve high capacity, improve porosity, and efficient loading.

Active Publication Date: 2019-05-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low oxygen functional group loading efficiency when the carbon material is loaded with oxygen-containing groups by gas phase oxidation and easy to cause waste liquid pollution by liquid phase oxidation, and proposes a coal-based hard carbon for sodium storage negative electrode Directional control method of surface oxygen functional groups

Method used

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  • Direction control method of surface oxygen functional groups on coal-based hard carbon for sodium-storing cathodes
  • Direction control method of surface oxygen functional groups on coal-based hard carbon for sodium-storing cathodes
  • Direction control method of surface oxygen functional groups on coal-based hard carbon for sodium-storing cathodes

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specific Embodiment approach 1

[0036] Specific implementation mode 1: This implementation mode is used for the coal-based hard carbon surface oxygen functional group directional control method for sodium storage negative electrode according to the following steps:

[0037] 1. Raw material refinement

[0038] Crushing, grinding and sieving coal raw materials in sequence to obtain fine coal powder;

[0039] 2. High temperature carbonization

[0040] Put the pulverized coal in an atmosphere furnace, carry out carbonization treatment in an inert atmosphere, and then naturally cool down to room temperature to obtain high-temperature carbonized coke;

[0041] 3. Ball milling treatment

[0042] placing the high-temperature carbonized coke in step 2 in a ball milling tank for ball milling to obtain a ball milling product; during the ball milling, the atmosphere in the ball milling tank is air atmosphere, nitrogen atmosphere or carbon dioxide atmosphere;

[0043] Four, cleaning and drying

[0044] The ball-mille...

specific Embodiment approach 2

[0049] Embodiment 2: This embodiment is different from Embodiment 1 in that: the particle size of the pulverized coal in step 1 is 20-100 mesh. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0050] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the coal raw material in step 1 is a mixture of one or more of lignite, bituminous coal, sub-bituminous coal or anthracite in any proportion. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a direction control method of surface oxygen functional groups on coal-based hard carbon, in particular to a direction control method of surface oxygen functional groups for coal-based hard carbon for sodium-storing cathodes, and is intended to solve the problems that when a carbon material carries oxygen groups, gas oxidation causes low carrying efficiency of oxygen functional groups and liquid oxidation easily causes waste liquid pollution. The directional control method herein comprise s crushing a coal material, grinding, screening to obtain fine coal powder, carbonizing the fine coal powder at a high temperature, carrying out ball milling in the atmosphere of air, nitrogen or carbon dioxide, washing, and drying. The types and contents of oxygen functional groups to modify the coal-based hard carbon material can be controlled through changing the ball milling atmosphere, so that efficient carrying of oxygen groups is achieved, with no waste liquid pollutioncaused. The direction control method is suitable for directional control of surface oxygen functional groups on coal-based hard carbon.

Description

technical field [0001] The invention relates to a method for directional control of oxygen functional groups on the surface of coal-based hard carbon. Background technique [0002] With the development of society, the shortage of energy resources and the environmental problems brought about by fossil energy have attracted people's attention, and the research and development of new energy storage materials is imminent. Zinc-manganese dry batteries, alkaline zinc-manganese dry batteries, zinc-mercury batteries, zinc-silver button batteries and other primary batteries produce less pollution than traditional fossil energy materials, effectively solving the problem of fossil energy scarcity. However, there are problems that the internal resistance of the primary battery is large, it cannot be used repeatedly and the post-processing is complicated. Due to its high energy density, lithium-ion batteries have become the preferred renewable energy storage materials and have been rapi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05H01M4/587H01M10/054
CPCY02E60/10
Inventor 孙飞王丽杰王桦高继慧皮信信曲智斌
Owner HARBIN INST OF TECH
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