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Preparation method of super-capacitor activated carbon

A technology of supercapacitor and activated carbon, which is applied in chemical instruments and methods, hybrid capacitor electrodes, inorganic chemistry, etc., can solve the problem of not involving the system refining method of activated carbon materials, and achieve the effect of less surface functional groups, improved quality and high purity

Pending Publication Date: 2021-04-27
JIANGSU JICUI ANTAI CHUANGMING ADVANCED ENERGY MATERIALS RES INST CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The preparation technology of activated carbon materials provided by these patents covers the preparation and activation methods of activated carbon materials. Some of these patents refer to the acid washing and impurity removal of activated carbon materials, but none of them involve the systematic refining method of activated carbon materials.

Method used

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  • Preparation method of super-capacitor activated carbon
  • Preparation method of super-capacitor activated carbon
  • Preparation method of super-capacitor activated carbon

Examples

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preparation example Construction

[0040] The preparation method of the supercapacitor activated carbon provided by the invention comprises the following steps: activation, pickling, surface reduction, water washing, drying and powder making. Specific steps are as follows:

[0041] 1. Activation: add the coconut shell carbonized material into the quartz boat (that is, ceramic boat), and then put it into the tube furnace. / min, 10°C / min, 15°C / min) to heat the furnace tube to 800-1000°C (820°C, 850°C, 880°C, 900°C, 920°C, 950°C, 970°C, 990°C). At high temperature, introduce water vapor or ultrapure water into the furnace tube with the nitrogen gas flow, the amount of steam or water used is 0.1-1.5ml / min (0.2ml / min, 0.4ml / min, 0.6ml / min, 0.8ml / min , 1.0ml / min, 1.2ml / min, 1.4ml / min), the steaming time is 0.5~2h (0.8h, 1h, 1.5h, 1.8h). Thereafter, the furnace was naturally cooled to room temperature while maintaining a nitrogen atmosphere, and the activation material was taken out.

[0042] 2. Acidification: add hy...

Embodiment 1

[0047] The preparation method of the supercapacitor activated carbon provided in this embodiment includes the following steps: activation, pickling, surface reduction, water washing, drying, and powder making. Specific steps are as follows:

[0048] 1. Activation: Add 10 grams of coconut shell carbonized material into a quartz boat (that is, a ceramic boat), then put it into a tube furnace, and heat the furnace tube to 900 °C at a heating rate of 5 °C / min under a nitrogen protective atmosphere. At high temperature, introduce water vapor or ultrapure water into the furnace tube along with the nitrogen gas flow, the amount of steam or water used is 1.0ml / min, and the steaming time is 1h. Thereafter, the furnace was naturally cooled to room temperature while maintaining a nitrogen atmosphere, and the activation material was taken out.

[0049] 2. Acidification: Put the activation material into a 500ml round bottom flask, add 300ml of 10% hydrochloric acid solution, reflux at 90°...

Embodiment 2-5

[0054] The supercapacitor activated carbon prepared in this embodiment 2-5, except that the surface reduction step is different from that in embodiment 1, the remaining steps and process parameters thereof are the same as those in embodiment 1. Present embodiment 2-5 adopts and shows that reduction technology parameter is as shown in table 1.

[0055] The technical parameters of preparing supercapacitor activated carbon in table 1 embodiment 2-5

[0056]

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Abstract

The invention provides a preparation method of super-capacitor activated carbon. The preparation method comprises the following steps of activation, acid pickling, surface reduction and water washing. Under a protective atmosphere, water vapor or ultrapure water is introduced into the carbonized material to be activated at a high temperature to obtain an activated material; the acid pickling is performedon the activated material by using inorganic acids with different concentrations to obtain an acid-pickled material; in an aqueous solution, organic functional groups on the surface of the acid pickling material is reduced by using a reducing agent to obtain a solid material; and the reducing agent is hydrazine hydrate or sodium borohydride. Surface reduction is carried out at 80-120 DEG C under reflux for 0.5-4 hours, and after reaction liquid is cooled to room temperature, suction filtration is carried out. A chemical reduction method is adopted and carried out in an aqueous solution medium, flammable and explosive gas is not used, and safety is high; the implementation temperature is low, and the energy consumption is low; the prepared super-capacitor activated carbon is high in purity and few in surface functional groups, and the prepared super-capacitor device is high in capacity retention ratio, long in cycle life and little in gas production after long-term use in the use process, and the quality of the super-capacitor device can be improved.

Description

technical field [0001] The invention relates to a preparation method of a supercapacitor electrode material, in particular to a preparation method of an activated carbon material. Background technique [0002] Supercapacitors have the characteristics of high power density, high energy density, long cycle life, wide temperature range, safety and environmental protection. As a new type of energy storage technology, supercapacitors have gradually been widely used in various industries such as new energy vehicles, wind power generation, rail transit, smart grid, smart three meters (water, electricity), consumer electronics, medical equipment, electric tools and toys. . [0003] Activated carbon is the core material for making supercapacitor electrodes. The preparation process of supercapacitor activated carbon is complicated, including activation, refining, drying and pulverization, etc. Among them, in the refining process, it is necessary to remove various inorganic impuriti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/336C01B32/378H01G11/34H01G11/42
CPCC01B32/336C01B32/378H01G11/34H01G11/42Y02E60/13
Inventor 崔玉省
Owner JIANGSU JICUI ANTAI CHUANGMING ADVANCED ENERGY MATERIALS RES INST CO LTD
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