Preparation method and application of biomass-derived ultra-high specific surface area activated carbon

A technology of ultra-high specific surface area and activated carbon, applied in chemical instruments and methods, carbon compounds, non-aqueous electrolyte batteries, etc., can solve the problems of waste of resources, environmental pollution, etc., and achieve the goals of improving performance, enriching materials, and preventing the accumulation of sulfur Effect

Inactive Publication Date: 2017-09-08
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If these wastes are discarded randomly during processing, it will not only waste resources, but also cause environmental pollution.

Method used

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  • Preparation method and application of biomass-derived ultra-high specific surface area activated carbon
  • Preparation method and application of biomass-derived ultra-high specific surface area activated carbon
  • Preparation method and application of biomass-derived ultra-high specific surface area activated carbon

Examples

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Effect test

example 1

[0039] 1. Carbonization:

[0040] Weigh the dried palm shell raw material and place it in a quartz crucible, then put it into a tube furnace for heating, and in a nitrogen-enclosed environment, raise the temperature in the tube furnace to 500±20 °C at a heating rate of 5 °C / min Carbonization treatment 2h.

[0041] After the completion, let it stand and cool to normal temperature, then take it out to obtain black palm shell carbonized material, which is crushed and sieved to obtain carbonized palm shell powder with a particle size of ≤10 μm, and set aside.

[0042] 2. Dipping:

[0043] Weigh the carbonized palm shell powder and mix it with KOH at a mass ratio of 3:1, add an appropriate amount of distilled water, stir evenly, and place it in an oven at 100±10°C to dry to obtain palm shell powder containing an activator.

[0044] 3. Activation:

[0045] Put the palm shell powder containing the activator in a nickel crucible, and then put it into a tube furnace. Under nitrogen ...

example 2

[0050] 1. Carbonization:

[0051] Weigh the dried palm shell raw material and place it in a quartz crucible, then put it into a tube furnace for heating, and in a nitrogen-enclosed environment, raise the temperature in the tube furnace to 500±20 °C at a heating rate of 5 °C / min Carbonization treatment 3h.

[0052] After the completion, let it stand and cool to normal temperature, then take it out to obtain black palm shell carbonized material, which is crushed and sieved to obtain carbonized palm shell powder with a particle size of ≤10 μm, and set aside.

[0053] 2. Dipping:

[0054] Weigh the carbonized palm shell powder and mix it with KOH at a mass ratio of 5:1, add an appropriate amount of distilled water, stir evenly, and dry in an oven at 100±10°C to obtain palm shell powder containing an activator.

[0055] 3. Activation:

[0056] Put the palm shell powder containing the activator in a nickel crucible, and then put it into a tube furnace. Under a nitrogen atmosphere...

example 3

[0061] Biomass-derived ultra-high specific surface area activated carbons were prepared in a similar manner to the above example, and were marked as: activated carbon 7#, activated carbon 8#, and activated carbon 9#.

[0062] 2. Application:

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Abstract

The invention discloses a preparation method and application of biomass-derived ultra-high specific surface area activated carbon and belongs to the technical field of preparation of a carbon material and a lithium-sulfur battery. The preparation method utilizes biomass waste palm shells as carbon sources, comprises simple processes such as carbonization, activation, rinsing and drying and can produce the biomass-derived ultra-high specific surface area activated carbon. Concretely, the preparation method comprises mixing activated carbon and sulfur for a sulfur attachment reaction to obtain a palm shell activated carbon-sulfur composite material, mixing the palm shell activated carbon-sulfur composite material, conductive carbon black and polyvinylidene fluoride, dissolving the mixture in nitrogen-methylpyrrolidone to obtain mixed slurry, coating aluminum foil with the mixed slurry and carrying out drying to obtain a positive electrode material of a lithium-sulfur battery. The activated carbon has a high specific surface area, concentrated pore size distribution, high adsorption performances and high electrochemical performances.

Description

technical field [0001] The invention belongs to the technical field of carbon material preparation and also relates to the technical field of lithium-sulfur batteries. Background technique [0002] Relying on traditional, non-renewable, and limited energy consumption or production of fossil fuel combustion is not only a necessary condition for the rapid development of the world economy, but also leads to increasingly serious environmental pollution, global warming, and the aggravation of energy crises. Therefore, environmental pollution and Energy supply has become the two most important issues. From the viewpoint of social sustainability and environmental friendliness, the use of porous carbon materials as electrode materials in lithium-sulfur batteries has attracted increasing attention. [0003] Lithium-sulfur batteries have attracted attention in fields such as electric vehicle applications due to their very high electrical energy density. However, the poor electronic / ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324H01M4/36H01M4/38H01M4/62H01M10/052
CPCC01P2002/72C01P2002/85C01P2004/03C01P2004/04C01P2006/12C01P2006/14C01P2006/40H01M4/362H01M4/38H01M4/623H01M4/625H01M10/052Y02E60/10
Inventor 庞欢徐梦娇薛怀国
Owner YANGZHOU UNIV
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