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Passivation modification processing method for ordered mesoporous carbon surface, hydrophilic ordered mesoporous carbon and application of ordered mesoporous carbon

A treatment method, mesoporous carbon technology, applied in the field of electrochemistry, can solve problems such as difficult control of the process, unhealthy operators, volatile concentration, etc., achieve safe and easy control of the process, improve hydrophilicity and conductivity, Effect of increasing battery capacity

Pending Publication Date: 2019-11-05
ZHAOQING LEOCH BATTERY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problem that this method exists is: concentrated nitric acid volatilizes very easily under high temperature condition and causes concentration change, makes technological process difficult to control, and after concentrated nitric acid volatilizes, can cause environmental pollution, environmental protection is relatively poor, also is unfavorable to the health of operator

Method used

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  • Passivation modification processing method for ordered mesoporous carbon surface, hydrophilic ordered mesoporous carbon and application of ordered mesoporous carbon
  • Passivation modification processing method for ordered mesoporous carbon surface, hydrophilic ordered mesoporous carbon and application of ordered mesoporous carbon
  • Passivation modification processing method for ordered mesoporous carbon surface, hydrophilic ordered mesoporous carbon and application of ordered mesoporous carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Add 50g of OMC to 2000ml of 10% H 2 O 2 In the solution with stirring, the reaction was carried out for 2 h, and the reaction temperature was 60 °C. After the reaction, the reactant was cooled to room temperature, the supernatant solution was removed, the obtained suspension was centrifuged 3 times, washed with deionized water repeatedly and suction filtered until neutral, and dried in a drying box at 60°C to constant weight; A hydrophilic ordered mesoporous carbon was obtained.

[0049] The OMC characterization methods are as follows: (1) Bollier transform infrared spectroscopy (FT-IR, Nicolet6700) to characterize the functional groups of the sample; (2) Laser Raman spectrometer (Raman, Dilor LABRAM-1B microscopic) to characterize the structure of the sample (3) X-ray diffractometer (XRD, Philips XPert pro MPD) to characterize the crystal phase composition of the sample; (4) Scanning electron microscope (SEM, JSM-7500F) to characterize the surface morphology of the s...

Embodiment 2

[0079] Weigh 50 g of the hydrophilic OMC prepared in Example 1, add it to 100 kg of deionized water, and stir at room temperature 25° C. for 30 min to obtain a uniform OMC dispersion.

[0080] The OMC dispersion liquid was added to the paste machine and mixed with 1000kg of lead powder to obtain a mixture. In order to realize the uniform mixing of OMC and lead powder, and to ensure the stability of the negative OMC / sponge Pb composite material lead paste, and the bonding ability of the electrode plate and the lead paste, the adhesive was added during the mixing process of the OMC dispersion and the lead powder. Substance short fibers, which are added in an amount of 0.015% of the overall mass of the mixture.

[0081] In the mixture of mixed OMC and lead powder, add 100kg of sulfuric acid with a density of 1.325g / ml and stir for 20min, the temperature of reaction is controlled at 65°C, and the obtained OMC / sponge Pb composite lead paste has an apparent density of 4.28g. / cm 3...

Embodiment 3

[0103] Negative plate prepared by machine coating: the apparent density prepared in Example 2 is 4.28 g / cm 3 The OMC / sponge Pb composite material lead paste is used to prepare an OMC-based composite negative electrode, or the OMC-based composite negative electrode is an OMC / sponge-Pb composite electrode. Among them, the OMC / sponge Pb composite material lead paste is all coated on the negative grid, and the size of the negative grid is: 68mm×44mm×1.7mm, which is made of lead-calcium-tin alloy with a calcium content of 0.09% and a tin content of 0.3%. . Of course, the tab portion of the negative grid does not need to be coated. The negative electrode grid coated with sponge Pb composite lead paste is continuously cured for 24 hours at 60°C and humidity of 85-95%; The plate is the OMC-based composite negative electrode. After the composite electrode is externalized, there is no precipitation of carbon material on the surface, and there is no expansion and deformation of the gr...

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Abstract

The invention relates to a passivation modification processing method for an ordered mesoporous carbon surface, a hydrophilic ordered mesoporous carbon and application of the ordered mesoporous carbon. The passivation modification processing method for the surface comprises the following steps that hydrogen peroxide is mixed with the ordered mesoporous carbon, a passivation modification reaction is carried out at a preset temperature of 55 DEG C to 70 DEG C, and the hydrophilic ordered mesoporous carbon is prepared. According to the passivation modification processing method for the ordered mesoporous carbon surface, the passivation modification of the ordered mesoporous carbon is carried out by using the hydrogen peroxide with the strong oxidation property; the reaction can be completed at a relatively mild preset temperature of 55 DEG C to 70 DEG C, the concentration of oxygen-containing groups on the surface of the ordered mesoporous carbon can be greatly improved, the presence of the oxygen-containing groups can improve a contact angle between electrolyte and an electrode material, and so that the originally hydrophobic and inert OMC becomes hydrophilic and has certain chemicalactivity.

Description

technical field [0001] The present application relates to the technical field of electrochemistry, and in particular, to a passivation modification treatment method for the surface of ordered mesoporous carbon, hydrophilic ordered mesoporous carbon and applications thereof. Background technique [0002] Ordered mesoporous carbon (OMC), which was first reported by researchers from Mobil Oil Corporation in 1992, has rapidly become a new research hotspot and has made great progress in some fields. . As a new type of non-silicon-based mesoporous material, OMC is a structural replica prepared by using ordered mesoporous materials as a template. Its main features are: (1) It has a regular and uniform pore structure and an orderly arrangement; (2) ) has high specific surface area and pore volume; (3) has narrow pore size distribution, and can be adjusted within a certain range; (4) has good thermal stability and chemical stability; (5) is very good Because of these advantages of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05H01M4/62H01M4/14
CPCC01B32/05H01M4/62H01M4/14Y02E60/10
Inventor 高士元
Owner ZHAOQING LEOCH BATTERY TECH
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