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Boron-sulfur co-doped spongy porous carbon, preparation method thereof, carbon electrode and zinc ion hybrid capacitor

A co-doping and sponge-like technology, applied in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, carbon compounds, etc., can solve the problems of complex preparation process and the electrochemical performance of zinc-ion hybrid capacitors to be improved, and achieve the goal of preparation Simple method, excellent cycle stability, and the effect of increasing specific capacity

Active Publication Date: 2021-10-15
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing carbon materials need to use a large amount of strong acid and strong alkali in the preparation, and the preparation process is complicated, and the electrochemical performance of the assembled zinc-ion hybrid capacitor also needs to be improved.

Method used

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  • Boron-sulfur co-doped spongy porous carbon, preparation method thereof, carbon electrode and zinc ion hybrid capacitor
  • Boron-sulfur co-doped spongy porous carbon, preparation method thereof, carbon electrode and zinc ion hybrid capacitor
  • Boron-sulfur co-doped spongy porous carbon, preparation method thereof, carbon electrode and zinc ion hybrid capacitor

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Experimental program
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Embodiment 1

[0036] A kind of preparation of carbon electrode, comprises the following steps:

[0037] S1: Bamboo chips were used as carbon source material, sonicated in absolute ethanol solution and deionized water for 2 hours, and then dried in an oven at 60°C for 4 hours;

[0038] S2: Put the dried bamboo chips into an agate mortar and grind them fully, then mix them with potassium carbonate, potassium tetraborate and potassium thioacetate, the mass ratio is bamboo chips: potassium carbonate: potassium tetraborate: potassium thioacetate = 5:15:2:1, carbonization and activation in Ar atmosphere for 1h, then naturally cool the sample to room temperature;

[0039] S3: The sample in S2 was magnetically stirred for 8 hours, then suction-filtered twice in absolute ethanol solution, then five times in deionized water, and finally dried for 4 hours to obtain the boron-sulfur co-doped spongy porous carbon, denoted as K 15 B 2 S 1 c.

[0040] S4, the obtained 30mg K 15 B 2 S 1 C. Add 5 mg...

Embodiment 2

[0045] A kind of preparation of carbon electrode, comprises the following steps:

[0046] S1: Bamboo chips were used as carbon source material, sonicated in absolute ethanol solution and deionized water for 2 hours, and then dried in an oven at 60°C for 4 hours;

[0047] S2: Put the dried bamboo chips into an agate mortar and grind them fully, then mix them with potassium carbonate, potassium tetraborate and potassium thioacetate, the mass ratio is bamboo chips: potassium carbonate: potassium tetraborate: potassium thioacetate = 5:25:2:2, carbonization and activation in Ar atmosphere for 2h, then naturally cool the sample to room temperature;

[0048] S3: The sample in S2 was magnetically stirred for 10 hours, then suction-filtered in absolute ethanol solution for 3 times, then in deionized water for 6 times, and finally dried for 5 hours to obtain the boron-sulfur co-doped spongy porous carbon, denoted as K 25 B 2 S 2 c.

[0049] S4, the obtained 40mg K 25 B 2 S 2 C. ...

Embodiment 3

[0054] A kind of preparation of carbon electrode, comprises the following steps:

[0055] S1: Bamboo chips were used as carbon source material, ultrasonicated in absolute ethanol solution and deionized water for 3 hours, and then dried in an oven at 60°C for 4 hours;

[0056] S2: Put the dried bamboo chips into an agate mortar and grind them fully, then mix them with potassium carbonate, potassium tetraborate and potassium thioacetate, the mass ratio is bamboo chips: potassium carbonate: potassium tetraborate: potassium thioacetate = 5:30:3:4, carbonization and activation in Ar atmosphere for 3h, then naturally cool the sample to room temperature;

[0057] S3: The sample in S2 was magnetically stirred for 12 hours, then suction filtered 4 times in absolute ethanol solution, then 6 times in deionized water, and finally dried for 6 hours to obtain the boron-sulfur co-doped spongy porous carbon, denoted as K 30 B 3 S 4 c.

[0058] S4, the resulting 50mg K 30 B 3 S 4 C. Ad...

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Abstract

The invention provides boron-sulfur co-doped spongy porous carbon which takes carbon as a matrix and is doped with boron and sulfur, wherein the doping amount of sulfur accounts for 0.57-2.67% of the mass percent of the boron-sulfur co-doped spongy porous carbon, and the doping amount of boron accounts for 1.01-1.58% of the mass percent of the boron-sulfur co-doped spongy porous carbon; the average pore size of the boron-sulfur co-doped spongy porous carbon is 2.11-2.49 nm, and the specific surface area of the boron-sulfur co-doped spongy porous carbon is 1887-2364 m < 2 > g <-1 >; the micropore specific surface area is 205-1349 m < 2 > g <-1 >; the total pore volume is 0.67-1.12 cm < 3 > g <-1 >; and the micropore volume is 0.130-0.521 cm < 3 > g <-1 >. The boron-sulfur co-doped spongy porous carbon is prepared from bamboo sawdust, potassium carbonate, potassium tetraborate and potassium thioacetate according to the mass ratio of 5: (15-30): (2-3): (1-4).

Description

technical field [0001] The present invention generally relates to the technical field of electrochemical energy storage devices, and specifically relates to a boron-sulfur co-doped sponge-like porous carbon and a preparation method thereof, a carbon electrode, and a zinc-ion hybrid capacitor. Background technique [0002] Supercapacitors have the advantages of high power density, good cycle stability, and excellent safety performance. They have broad applications in high-power output such as electronic products, electric vehicles, and military fields. However, their low energy density still cannot meet the needs of actual life. . [0003] Metal-ion batteries such as lithium-ion batteries have a high energy density (about 150-200Wh kg -1 ), has been widely used in various electronic devices. However, their low power density, poor cycle stability, and safety issues hinder their further development. Therefore, it is promising to construct a hybrid capacitor that combines a b...

Claims

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Application Information

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IPC IPC(8): H01G11/26H01G11/24H01G11/30H01G11/32H01G11/34H01G11/44H01G11/86C01B32/324C01B32/348
CPCH01G11/26H01G11/30H01G11/32H01G11/44H01G11/34H01G11/24H01G11/86C01B32/348C01B32/324Y02E60/13
Inventor 张以河张晓鹏张韩方张英歌孙黎张硕
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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