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A kind of biological microcrystalline graphite-carbon nano-film carbon electrode and its preparation method and battery

A technology of microcrystalline graphite and carbon nanofilm, applied in the energy field, can solve the problems of high price, complicated preparation technology of graphene and carbon nanotubes, and lack of market competitiveness, and achieves low cost, improved capacity and comprehensive performance. , cost-effective effect

Active Publication Date: 2021-03-23
杭州怡莱珂科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Adding graphene or carbon nanotubes to the electrode material can significantly improve the performance of the electrode, but the preparation technology of graphene and carbon nanotubes is complicated and expensive, and their large-scale application in the preparation of electrode materials does not have market competition in terms of cost force

Method used

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  • A kind of biological microcrystalline graphite-carbon nano-film carbon electrode and its preparation method and battery

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preparation example Construction

[0021] A kind of preparation method of above-mentioned biological microcrystalline graphite-carbon nano film carbon electrode comprises the following steps:

[0022] 1) Dissolving quaternary ammonium salt, polyethylene glycol and nickel nitrate in water to form an aqueous solution, wherein the concentration of quaternary ammonium salt and polyethylene glycol is 4-6%, and the concentration of nickel nitrate is 2-3%.

[0023] The recommended quaternary ammonium salt is cetyltrimethylammonium bromide, but other types of quaternary ammonium salts can also be used. The quaternary ammonium salt is a surfactant, and its function is to modify the surface of the carbon source material and increase its affinity with the organic binder.

[0024] It is recommended that the molecular weight of polyethylene glycol used should not exceed 6000. Polyethylene glycol with too large molecular weight has poor water solubility. Polyethylene glycol is a surface modification synergist, which can fur...

Embodiment 1

[0044]1) Weigh 0.3 g of cetyltrimethylammonium bromide, 0.3 g of polyethylene glycol 6000, 0.15 g of nickel nitrate hexahydrate, mix the three raw materials, add water to a total solid-liquid mass of 5 g, and stir until the solid is completely dissolve.

[0045] 2) Add 30g of dry corncob powder into the prepared solution, mix and stir evenly, put it in an oven and keep warm at 150°C until it is completely dried.

[0046] 3) Grind the dried mixture evenly. Add 25g of phenolic resin alcohol solution with a concentration of 65wt.%, and 2.6g of ethanolamine, mix and stir evenly until the material is completely wet.

[0047] 4) Transfer the wet material to a mold and press it into a sheet, and put it into a muffle furnace together with the mold at 180° C. for 2 hours to keep warm and solidify, and then demould after natural cooling.

[0048] 5) The solidified electrode sheet after demoulding was transferred to a tube furnace, heated to 900° C. for 3 hours under the protection of ...

Embodiment 2

[0050] 1) Weigh 0.3 grams of cetyltrimethylammonium bromide, 0.3 grams of polyethylene glycol 6000, 0.15 grams of nickel nitrate hexahydrate, mix the three raw materials, add water to a total solid-liquid mass of 7.5 grams, and stir until the solids are completely dissolve.

[0051] 2) Add 30g of dry lignocellulose into the prepared solution, mix and stir evenly, put it in an oven and keep warm at 110°C until it is completely dried.

[0052] 3) Grind the dried mixture evenly. Add 36g of phenolic resin alcohol solution (55wt.%) and 7.2g of propanolamine, mix and stir evenly until the material is completely wet.

[0053] 4) Transfer the wet material to a mold and press it into a sheet, and put it together with the mold into a muffle furnace at 175°C for 1.5 hours to keep warm and solidify, and then demould after natural cooling.

[0054] 5) The solidified electrode sheet after demoulding was transferred to a tube furnace, heated to 750° C. for 5 hours under nitrogen protection...

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Abstract

The invention discloses a biological microcrystalline graphite-carbon nano-film carbon electrode, a preparation method thereof and a battery. The carbon electrode is mainly composed of microcrystalline graphite with a plant microstructure, and the space between the microcrystalline graphite is filled with a carbon nano-film and micron to submicron micropores communicated with each other. Accordingto the preparation method, natural plant powder is used as a precursor, the biological microcrystalline graphite-carbon nano-film carbon material is obtained through structure preservation and catalytic carbonization technologies, and the preparation cost has competitive advantages. The biological microcrystalline graphite-carbon nano-film carbon electrode has the advantages of large specific surface area and high electrochemical activity and conductivity, is suitable for being used as a cathode of a lithium ion battery, an aluminum ion battery and other various secondary batteries, and is also suitable for being used as an anode of a seawater-aluminum battery. The carbon electrode is beneficial to improving the capacity and comprehensive performance of the battery, has a wide applicationprospect in the field of high-capacity batteries, and also has a certain application potential in the fields of chemical engineering, catalysis and functional materials.

Description

technical field [0001] The invention belongs to the field of energy, and in particular relates to a biological microcrystalline graphite-carbon nano-film carbon electrode, a preparation method thereof and a battery. Background technique [0002] Adding graphene or carbon nanotubes to the electrode material can significantly improve the performance of the electrode, but the preparation technology of graphene and carbon nanotubes is complicated and expensive, and their large-scale application in the preparation of electrode materials does not have market competition in terms of cost force. [0003] On the other hand, many herbaceous and woody plants are mainly composed of carbohydrates, and their cells form a fine hollow structure. These hollow structures composed of plant cells can form a rich structure similar to graphene and carbon after carbonization. Nanofilm carbon materials. The biggest obstacle from plant cells to graphene-like carbon materials is the shrinkage, coll...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/587H01M4/62H01M6/34H01M10/0525H01M10/054H01M4/08H01M4/1393B82Y30/00
CPCB82Y30/00H01M4/08H01M4/1393H01M4/362H01M4/587H01M4/625H01M6/34H01M10/0525H01M10/054Y02E60/10
Inventor 叶瑛夏天张平萍
Owner 杭州怡莱珂科技有限公司