Nitrogen element self-doped tobacco stem-based activated carbon electrode material as well as preparation method and application thereof

A technology based on activated carbon and electrode material, which is applied in the field of self-doped nitrogen-based tobacco rod-based activated carbon electrode material and its preparation field, can solve the problems of low nitrogen content, lack of availability, affecting the performance of supercapacitors, etc. Capacitance, increase energy density, enhance the effect of added economic value

Active Publication Date: 2021-03-09

CROP RES INST GUANGDONG ACAD OF AGRI SCI

12 Cites 0 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0005] Nitrogen is an essential element for the growth of tobacco leaves. However, the inventors found in the research that during the tobacco planting process, the nitrogen content in the tobacco stalks was less, and the activated c...

Abstract

The invention relates to the technical field of electrode material preparation and particularly discloses a nitrogen element self-doped tobacco stem-based activated carbon electrode material and a preparation method and application thereof. The preparation method of the nitrogen element self-doped tobacco stem-based activated carbon electrode material comprises the following steps of (1) plantingflue-cured tobacco; (2) taking tobacco straw, crushing the tobacco straw to obtain tobacco straw powder, and then drying the tobacco straw powder; (3) carrying out pyrolysis treatment on the dried tobacco stem powder in a nitrogen atmosphere to obtain a tobacco stem carbon powder precursor; (4) mixing the tobacco stem carbon powder precursor with KOH, adding water for further grinding and kneading, and drying to obtain a tobacco stem carbon powder/KOH mixture; and (5) carrying out pyrolysis treatment on the tobacco stem carbon powder/KOH mixture to obtain the tobacco stem-based activated carbon electrode material self-doped with the nitrogen element. When the cigarette-stem-based activated carbon electrode material is used for preparing a supercapacitor, the specific capacitance of the supercapacitor can be improved, and the energy density can be increased.

Application Domain

Hybrid capacitor electrodesHybrid/EDL manufacture

Technology Topic

Activated carbonCapacitance +8

Examples

Experimental program(3)
Comparison scheme(2)
Effect test(1)

Example Embodiment

[0033] Example 1

[0034] (1) Planting flue-cured tobacco;

[0035] (2) Take the tobacco straw, pulverize the tobacco straw into 200 mesh, to smoke stalk powder, then put the smoke stalk powder in the oven at 70 ° C for 24 h for drying;

[0036] (3) Put the dry smoke powder in the tube furnace under a nitrogen atmosphere (flow rate is 3 ml · min -1 ), At 5 ° C · min -1 The speed rises to 550 ° C for 2 h, pyrolysis treatment; after the heat treatment, the furnace is taken after the furnace is reduced to room temperature to obtain a cigarette carbon powder precursor;

[0037] (4) After mixing the smoke carbon powder precursor with KOH, water is added to further ground kneading, then placed in a vacuum drying tank at 70 ° C for 12 h, dried to smoke stalk toner / KOH mixture;

[0038] (5) Next, the smoke carbon powder / KOH mixture is placed in a tubular furnace in a nitrogen atmosphere (3 ml · min -1 ), At 5 ° C · min -1 The speed was raised to 850 ℃ incubated 2h, pyrolysis process; taken out after cooled to room temperature, the sample was washed thoroughly with 1M hydrochloric acid solution; and from tobacco stems element doped with nitrogen-based activated carbon to obtain the electrode material;

[0039] Specifically, in step (1), in the process of planting the flue-cured tobacco, nitrogen, phosphorus and potassium fertilizers are dissolved in the lychee branches in the lychee branches, and the total nitrogen, phosphorus and potassium fertilizer are used. The weight ratio of the weight and the lychee branch leaf water is 1: 5; the lychee branch leaf water extract is prepared by the following method: the dry lychee leaves are placed in water, soaked for 30 days, that is, Litchi tree branch leaf water purification; the weight ratio of the lychee tree leaves and water is 1:20.

[0040] Specifically, the nitrogen fertilizer is applied with ammonium nitrate, phosphate fertilizer, potassium sulfate is applied to potassium phosphate fertilizer, and the fertilization amount of the nitrogen is 112.5 kg / hm. 2 The fertilization of the phosphate fertilizer, potassium fertilizer is 225 kg / hm 2.

[0041] Specifically, the weight ratio of the inverted body ratio of the smoke stalk carbon powder precursor and KOH is 1: 5; the addition weight of water in the step (4) and the total weight ratio of the smoke carbon powder precursor and KOH is 1: 1 .

Example Embodiment

[0042] Example 2

[0043] (1) Planting flue-cured tobacco;

[0044] (2) Take the tobacco straw, pulverize the tobacco straw into 100 mesh, to smoke stalk powder, then put the smoke powder in the oven at 70 ° C for 24 h for drying;

[0045] (3) Put the dry smoke powder in the tube furnace under a nitrogen atmosphere (flow rate is 3 ml · min -1 ), At 3 ° C · min -1 The speed rises to 500 ° C holding for 3 hours, performing pyrolysis treatment; after heat treatment, the furnace is taken after the furnace is removed to obtain a cigarette carbon powder precursor;

[0046] (4) After mixing the smoke carbon powder precursor with KOH, water is added to further ground kneading, then placed in a vacuum drying tank at 70 ° C for 12 h, dried to smoke stalk toner / KOH mixture;

[0047] (5) Next, the smoke carbon powder / KOH mixture is placed in a tubular furnace in a nitrogen atmosphere (3 ml · min -1 ), At 3 ° C · min -1 The speed was raised to 800 ℃ incubated 3h, pyrolysis process; taken out after cooled to room temperature, the sample was washed thoroughly with 1M hydrochloric acid solution; and from tobacco stems element doped with nitrogen-based activated carbon to obtain the electrode material;

[0048]Specifically, in step (1), in the process of planting the flue-cured tobacco, nitrogen, phosphorus and potassium fertilizers are dissolved in the lychee branches in the lychee branches, and the total nitrogen, phosphorus and potassium fertilizer are used. The weight ratio of the weight and the lychee branches is 1: 3; the lychee branch leaf water purifier was prepared by the following method: the dry litchi branches were placed in water, soaking 45 days, Litchi tree branch leaf water purification; the weight ratio of the lychee tree leaves and water is 1:10.

[0049] Specifically, the nitrogen fertilizer is applied with ammonium nitrate, phosphate fertilizer, potassium sulfate is applied to potassium phosphate, and the fertilizer is 100 kg / hm. 2 The fertilizer amount of the phosphate fertilizer, potassium fertilizer is 200kg / hm 2.

[0050] Specifically, the weight ratio of the tumulating body and KOH in step (4) in step (4) is 1: 3; the addition weight of water in step (4) and the total weight ratio of smoke carbon powder precursors and KOH is 1: 1 .

Example Embodiment

[0051] Example 3

[0052] (1) Planting flue-cured tobacco;

[0053] (2) Take the tobacco straw, pulverize the tobacco straw into 50 mesh, to smoke stalk powder, then put the smoke stalk powder in the oven at 70 ° C for 24 h for drying;

[0054] (3) Put the dry smoke powder in the tube furnace under a nitrogen atmosphere (flow rate is 3 ml · min -1 ), At 6 ° C · min -1 The speed rises to 600 ° C insulation 1.5h, performing pyrolysis treatment; after the heat treatment, the furnace is taken after the furnace is reduced to room temperature to obtain a cigarette carbon powder precursor;

[0055] (4) After mixing the smoke carbon powder precursor with KOH, water is added to further ground kneading, then placed in a vacuum drying tank at 70 ° C for 12 h, dried to smoke stalk toner / KOH mixture;

[0056] (5) Next, the smoke carbon powder / KOH mixture is placed in a tubular furnace in a nitrogen atmosphere (3 ml · min -1 ), At 6 ° C · min -1 The speed was raised to 900 deg.] C incubation 1.5h, pyrolysis process; After cooled to room temperature taken, the resulting sample was washed thoroughly with 1M hydrochloric acid solution; and from tobacco stems element doped with nitrogen-based activated carbon to obtain the electrode material;

[0057] Specifically, in step (1) during the cultivation of tobacco, while the tobacco of nitrogen, phosphorus and potassium, nitrogen, phosphorus and potassium were dissolved in water extract of lychee tree leaves in fertilization; wherein the total nitrogen, phosphorus and potassium litchi tree leaves by weight aqueous extract weight ratio of 1:10; litchi tree leaves said aqueous extract prepared by the following method: the dried litchi tree leaves into water, soaked for 20 days, to obtain the Litchi tree branches leaf water extraction; the weight ratio of the lychee branches and water is 1:30.

[0058] Specifically, the nitrogen fertilizer is applied with ammonium nitrate, phosphate fertilizer, potassium sulfate is applied to potassium sulfate; the fertilizer is 130 kg / hm. 2 The fertilizer amount of the phosphate fertilizer is 250 kg / hm. 2.

[0059] Specifically, the weight ratio of the toner of the smoke carbon powder precursor and KOH is 1: 8; the addition weight of the water in the step (4) and the total weight ratio of the smoke carbon powder precursor and KOH is 1: 1 .

PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

Similar technology patents

Silicon dioxide-based high-specific-capacity supercapacitor electrode material, and preparation method thereof

PendingCN113096966AHigh specific capacitanceavoid mechanical breakage

Owner:GUANGDE TIANYUN NEW TECH

Method for preparing nitrogen-doped carbon gel@(PANI/GO)n supercapacitor for wireless Bluetooth earphone

ActiveCN110136971Agood reproducibilityHigh specific capacitance

Owner:广东华盛兴诚知识产权代理有限公司

Integrated heteropolyacid modified polyaniline/titanium nitride core-shell nanowire array composite material and its preparation method and application

ActiveCN106449128BHigh specific capacitanceHigh practical value and industrial production potential

Owner:SOUTHEAST UNIV

B and N co-doped porous carbon material with molybdenum sulfide nanosheets grown on surface in situ, and preparation method and application of B and N co-doped porous carbon material

PendingCN114758902AImprove cycle stabilityhigh specific capacitance

Owner:CHANGCHUN UNIV OF TECH

A kind of preparation method and application of titanium dioxide/carbon/ferrous disulfide composite material

ActiveCN112993221BHigh specific capacitancelow cost

Owner:多助科技(武汉)有限公司

Classification and recommendation of technical efficacy words

Increase energy density
High specific capacitance

Double-source energy system of battery electric vehicle, power supply control method, fast charging method and slow charging method

PendingCN106696721AEnhance load adaptabilityIncrease energy density

Owner:四川新筑通工汽车有限公司

Nitrogen element self-doped tobacco stem-based activated carbon electrode material as well as preparation method and application thereof

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

Similar technology patents

Silicon dioxide-based high-specific-capacity supercapacitor electrode material, and preparation method thereof

Method for preparing nitrogen-doped carbon gel@(PANI/GO)n supercapacitor for wireless Bluetooth earphone

Integrated heteropolyacid modified polyaniline/titanium nitride core-shell nanowire array composite material and its preparation method and application

B and N co-doped porous carbon material with molybdenum sulfide nanosheets grown on surface in situ, and preparation method and application of B and N co-doped porous carbon material

A kind of preparation method and application of titanium dioxide/carbon/ferrous disulfide composite material

Classification and recommendation of technical efficacy words

Lithium ion secondary battery and cathode material prepared by same

Preparation method of lithium-enriched magnesium-based anode material of lithium ion battery

Positive Electrode Mixture for Nonaqueous Battery and Positive Electrode Structure

Preparation method for poplar catkin based biomass carbon/sulfur composite material

Double-source energy system of battery electric vehicle, power supply control method, fast charging method and slow charging method

Preparation method for graphene/carbon nano-tube composite fibre-based super capacitor

Phosphor-doped porous carbon material for super capacitor and preparation method thereof

Method for preparing microbial fuel cell electrode material employing rape stalks

Preparation method of super capacitor electrode material (nickel oxide)

Polymer supercapacitor using gel polymer as electrolyte and its preparing process