Hard carbon prepared from biomass waste bagasse as well as preparation method and application of harden carbon

A sugarcane bagasse and biomass technology, applied in the field of energy storage, can solve the problems of performance impact, unstable performance, complex preparation process, etc., and achieve the effects of low cost, high specific capacity and good reproducibility

Active Publication Date: 2018-05-22
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hard carbon materials prepared from different biomass materials also have a great impact on the performance, and the existing biomass hard carbon preparation process is complex and the performance is unstable

Method used

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  • Hard carbon prepared from biomass waste bagasse as well as preparation method and application of harden carbon
  • Hard carbon prepared from biomass waste bagasse as well as preparation method and application of harden carbon
  • Hard carbon prepared from biomass waste bagasse as well as preparation method and application of harden carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This example is used to illustrate the biomass hard carbon material of the present invention and its preparation method.

[0030] Present embodiment adopts biomass waste bagasse to prepare the preparation method of hard carbon material, and concrete steps comprise as follows:

[0031] Step 1: Clean the bagasse by ultrasonic, then dry it in a blast drying oven at 60°C, and crush it into powder for later use.

[0032] Step 2: Take 10 g of bagasse powder and 200 g of ball milling beads and place them in a planetary ball mill tank, and ball mill at a speed of 350 r / min for 12 hours to obtain bagasse powder after mechanical ball milling.

[0033] Step 3: Take 5g of bagasse powder in step 2 and place it in a tube furnace. In an argon flow, heat it up to 800°C at a rate of 5°C / min for heat treatment for 2 hours. After the reaction, cool to room temperature to obtain biomass Hard carbon material, marked HC-800.

Embodiment 2

[0035] This example is to illustrate the biomass hard carbon material of the present invention and its preparation method.

[0036] Present embodiment adopts biomass waste bagasse to prepare the preparation method of hard carbon material, and concrete steps comprise as follows:

[0037] Step 1: Clean the bagasse by ultrasonic, then dry it in a blast drying oven at 60°C, and crush it into powder for later use.

[0038] Step 2: Take 5g of bagasse powder in step 1 and place it in a tube furnace. In an argon flow, heat it up to 900°C at a rate of 5°C / min for heat treatment for 2 hours. After the reaction, cool to room temperature to obtain biomass Hard carbon material, marked HC-900A.

Embodiment 3

[0040] This example is used to illustrate the biomass hard carbon material of the present invention and its preparation method.

[0041] Present embodiment adopts biomass waste bagasse to prepare the preparation method of hard carbon material, and concrete steps comprise as follows:

[0042] Step 1: Clean the bagasse by ultrasonic, then dry it in a blast drying oven at 60°C, and crush it into powder for later use.

[0043] Step 2: Take 10 g of bagasse powder and 150 g of ball milling beads and place them in a planetary ball mill jar, and ball mill for 12 hours at a speed of 400 r / min to obtain bagasse powder after mechanical ball milling.

[0044] Step 3: Take 3 g of bagasse powder in step 2 and place it in a tube furnace, heat it at 900° C. for 2 hours in an argon flow at a heating rate of 3° C. / min, and cool to room temperature after the reaction.

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Abstract

The invention discloses hard carbon prepared from biomass waste bagasse as well as a preparation method of the harden carbon and an application of the harden carbon using as a negative electrode material of sodium ion batteries and potassium ion batteries. The preparation method takes the bagasse as a raw material, mechanical ball milling is performed, high-temperature treatment is performed, andtherefore the hard carbon is prepared. The hard carbon provided by the invention exhibits excellent electrochemical performance when being used as the negative electrode of the sodium ion batteries and the potassium ion batteries; at the current density of 50mA/g, the sodium storage specific capacity is still 267.7mAh/g after 200 cycles; and the hard carbon prepared by the method takes the biomasswaste bagasse as the raw material, has low costs, is environmentally friendly, has the simple preparation method and is suitable for large-scale production.

Description

technical field [0001] The invention relates to the field of energy storage, in particular to a hard carbon material prepared from biomass waste bagasse, a preparation method thereof, and an application in sodium-ion batteries and potassium-ion batteries. Background technique [0002] It is well known that lithium-ion batteries have been successfully used in portable electronic products and power vehicles because of their high energy density, high voltage and long cycle life. However, the low crustal content of lithium (0.0065%), uneven geographical distribution (mainly concentrated in South America), and high cost ($5000 / ton) make lithium-ion batteries unable to meet the increasing demand for large-scale energy storage. [0003] Sodium and potassium belong to the same main group as lithium, have similar physical and chemical properties to metal lithium, and have the advantages of abundant global content and simple extraction. In recent years, sodium-ion batteries and potas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05H01M4/583H01M10/054
CPCH01M4/583H01M10/054Y02E60/10
Inventor 邓健秋王金姚青荣周怀营王仲民
Owner GUILIN UNIV OF ELECTRONIC TECH
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