Preparation method of porous spherical biological carbon and application

A bio-carbon and spherical technology, which is applied in the manufacture of hybrid/electric double-layer capacitors, electrical components, battery electrodes, etc., to achieve the effects of easy industrial production, excellent electrochemical performance, and increased specific surface area

Inactive Publication Date: 2016-07-27
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Preparation method of porous spherical biological carbon and application
  • Preparation method of porous spherical biological carbon and application

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preparation example Construction

[0023] A method for preparing porous spherical biochar, comprising the following steps:

[0024] Step 1: Weigh 0.5-2g of rapeseed pollen and place it in the lining of a hydrothermal kettle, add 30-50mL of deionized water and stir for 5-20min, then add 5-20mL of concentrated sulfuric acid and continue stirring for 30-60min until the pollen is completely dissolved. Described concentrated sulfuric acid, also can replace with concentrated nitric acid, concentrated hydrochloric acid, phosphoric acid etc.

[0025] Step 2: Install the inner lining of the hydrothermal kettle with prepared rapeseed pollen solution in the outer lining, fix it and place it in a homogeneous reactor, and heat up from room temperature at a rate of 5-10°C / min. Raise the temperature to 120-200° C., adjust the filling ratio of the hydrothermal reaction to 30%-80%, and react for 12-36 hours.

[0026] Step 3: Suction filter the solution after the hydrothermal reaction, wash with deionized water for 2 to 5 times...

Embodiment 1

[0033] Step 1: Weigh 0.5g of rapeseed pollen and place it in the lining of a hydrothermal kettle, add 30mL of deionized water and stir for 5min, then add 5mL of concentrated sulfuric acid and continue stirring for 30min until the pollen is completely dissolved.

[0034] Step 2: Install the inner lining of the hydrothermal kettle equipped with the prepared rape pollen solution in the outer lining, fix it and place it in a homogeneous reactor, and raise the temperature from room temperature to 120°C, adjust the filling ratio of the hydrothermal reaction to 80%, and react for 12 hours.

[0035] Step 3: Suction filter the solution after the hydrothermal reaction, first wash twice with deionized water, and then wash twice with absolute ethanol to remove impurities generated during the reaction. Then, the rapeseed pollen washed and suction-filtered was dried at a temperature of 60° C. for 12 hours.

[0036] Step 4: Put the dried rapeseed pollen in the quartz tube of the tube atmosp...

Embodiment 2

[0039] Step 1: Weigh 1g of rapeseed pollen and place it in the lining of a hydrothermal kettle, add 50mL of deionized water and stir for 10min, then add 10mL of concentrated sulfuric acid and continue stirring for 40min until the pollen is completely dissolved.

[0040] Step 2: Install the inner lining of the hydrothermal kettle equipped with the prepared rape pollen solution in the outer lining, fix it and place it in a homogeneous reactor, and raise the temperature from room temperature to 180°C, adjust the filling ratio of the hydrothermal reaction to 50%, and react for 24 hours.

[0041] Step 3: Suction filter the solution after the hydrothermal reaction, wash with deionized water for 3 times, and then wash with absolute ethanol for 3 times, so as to remove impurities generated during the reaction. Then, the washed and suction-filtered rapeseed pollen was dried at a temperature of 80° C. for 24 hours.

[0042] Step 4: Put the dried rapeseed pollen in the quartz tube of th...

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Abstract

The invention discloses a preparation method of porous spherical biological carbon and an application. The method comprises the following steps: firstly, carbonizing pollen by hydrothermal reaction; secondly, burning the carbonized pollen under inert atmosphere protection; and finally carrying out washing, suction filtration and drying on the burnt product to obtain the porous spherical biological carbon. According to the method, the technology is simple and easy to control; carbonization and activation of the pollen can be well achieved under the premise of keeping the original structure; and spherical biological carbon with different pore structures can be obtained by controlling the reaction temperature. Furthermore, the biological carbon prepared by the method can be applied to a lithium/sodium-ion battery and a super capacitor, can be used as an adsorbent, a template agent and a carbon substrate in a composite material, and especially demonstrates excellent electrochemical properties when applied to the lithium/sodium-ion battery.

Description

【Technical field】 [0001] The invention belongs to the technical field of preparation of three-dimensional carbon materials, and relates to the preparation and application of porous spherical biochar. 【Background technique】 [0002] Due to the advantages of high working voltage, high capacity, small self-discharge and long cycle life, lithium-ion batteries are widely used in the portable electronics market, and have become the primary choice for power sources for electric vehicles and large-scale energy storage systems. However, as With the real arrival of the era of electric vehicles and smart grids, global lithium resources will not be able to effectively meet the huge demand for power lithium-ion batteries [Tarascon JM, Armand M. Issues and challenges facing rechargeable lithium batteries [J]. Nature, 2001, 414(6861): 359-367]. [0003] Sodium-ion batteries have the characteristics of abundant resources, low cost, and environmental friendliness, and are considered to be an...

Claims

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Application Information

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IPC IPC(8): H01G11/34H01G11/36H01G11/86H01M4/583H01M4/587
CPCH01G11/34H01G11/36H01G11/86H01M4/583H01M4/587Y02E60/10Y02E60/13
Inventor 黄剑锋李文斌任一杰李瑞梓费杰曹丽云王海静罗晓敏井宣人闻稼宝
Owner SHAANXI UNIV OF SCI & TECH
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