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Method for manufacturing lithium ion negative electrode activated carbon from sunflower discs, electrode and testing method

A technology of sunflower discs and activated carbon, applied in battery electrodes, chemical instruments and methods, circuits, etc., can solve problems such as environmental pollution and high cost, and achieve the effects of strong cycle stability, increased phosphorus content, and simple experimental steps

Inactive Publication Date: 2019-02-19
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of these materials are expensive, or the process of material synthesis has serious pollution to the environment

Method used

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  • Method for manufacturing lithium ion negative electrode activated carbon from sunflower discs, electrode and testing method
  • Method for manufacturing lithium ion negative electrode activated carbon from sunflower discs, electrode and testing method
  • Method for manufacturing lithium ion negative electrode activated carbon from sunflower discs, electrode and testing method

Examples

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Effect test

Embodiment 1

[0033] An activated carbon for making lithium-ion negative electrode materials from sunflower discs, the production method is as follows, using sunflower discs as raw materials, first drying the sunflower discs in an oven at 105°C for 24 hours, drying and crushing them through a 20-mesh sieve for use. Take 5g of the processed sunflower disc powder and put it in the reaction kettle, add 20ml of phosphoric acid and 15ml of water to mix evenly, put it in a high-temperature oven, set the temperature of the oven at 200°C, and keep it warm for 12h. Wash with water and place in an oven at 105°C to dry for later use; take an appropriate amount of the above-mentioned dried product, put it into a crucible and place it in a high-temperature tube furnace for activation, the nitrogen flow rate is 1.0L / min, the heating rate is 5°C / min, and the activation temperature is 450 ℃, activated for 30 minutes; the activated sample was washed with 0.1mol / L dilute HCl solution, then washed with deioniz...

Embodiment 2

[0037] A kind of activated carbon for making lithium ion negative electrode materials with sunflower discs, its preparation method is as follows, with sunflower discs as raw material, first the sunflower discs are dried in a 105 ℃ oven for 24 hours, dried and broken through a 40-mesh sieve for use. The processed Take 5g of sunflower pan powder and put it in a reaction kettle, add 25ml of phosphoric acid and 15ml of water to mix evenly, put it in a high-temperature oven, set the temperature of the oven at 125°C, and keep it warm for 12h. Dry in an oven at 105°C for use; take an appropriate amount of the above-mentioned dried product, put it into a crucible and place it in a high-temperature tube furnace for activation, the nitrogen flow rate is 1.0L / min, the heating rate is 5°C / min, the activation temperature is 450°C, and the activation is 30min ; Clean and activate the obtained sample with 0.1mol / L dilute HCl solution, then wash with deionized water to neutrality, and dry to o...

Embodiment 3

[0041] A kind of active carbon for making lithium ion negative electrode materials with sunflower discs, its production method is as follows, with sunflower discs as raw material, first the sunflower discs are dried in a 105 ° C oven for 24 hours, dried and broken through a 60-mesh sieve for use. The processed Take 5g of sunflower pan powder and put it in a reaction kettle, add 15ml of phosphoric acid and 15ml of water to mix evenly, put it in a high-temperature oven, set the temperature of the oven at 185°C, and keep it warm for 12 hours. Dry in an oven at 105°C for use; take an appropriate amount of the above-mentioned dried product, put it into a crucible and place it in a high-temperature tube furnace for activation, the nitrogen flow rate is 1.0L / min, the heating rate is 5°C / min, the activation temperature is 450°C, and the activation is 30min ; Clean and activate the obtained sample with 0.1mol / L dilute HCl solution, then wash with deionized water to neutrality, and dry t...

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Abstract

The invention discloses a method for manufacturing lithium ion negative electrode activated carbon from sunflower discs. The method comprises drying and cracking raw materials, performing simple waterheating and sintering, acid-pickling, washing and drying obtained products to obtain phosphorous-doped biomass activated carbon serving as a lithium ion negative electrode material. The prepared phosphorous-doped biomass activated carbon is high in specific capacity and coulombic efficiency and good in circulating stability and is an excellent lithium ion battery negative electrode material.

Description

technical field [0001] The invention relates to the field of activated carbon preparation, in particular to a method for preparing activated carbon for lithium ion negative electrodes from sunflower discs. Background technique [0002] As an energy storage system, ion batteries have been developed in the 1960s and 1970s, making outstanding contributions to the development of electronic equipment, aerospace, wireless remote control and other technologies. However, with the rapid development of the world economy, people have put forward higher requirements for the capacity and cycle performance of lithium-ion batteries. At present, the research on lithium-ion battery negative electrode materials is very in-depth. Graphite is widely studied because of its good conductivity; silicon materials are favored by researchers because of their high theoretical capacity; various metal oxides, such as Tin oxide, molybdenum oxide, germanium oxide, etc. have also been discovered by researc...

Claims

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Application Information

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IPC IPC(8): C01B32/318C01B32/342H01M4/587H01M4/133H01M4/1393H01M10/0525
CPCC01B32/318C01B32/342H01M4/133H01M4/1393H01M4/587H01M10/0525Y02E60/10
Inventor 邢献军李珊王文泉刘建华蒋汶叶聪
Owner HEFEI UNIV OF TECH
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