Biomass hard carbon negative electrode material for sodium ion battery, preparing method and sodium ion battery

A technology of sodium ion battery and negative electrode material, applied in battery electrodes, secondary batteries, electrochemical generators, etc., can solve the problems of low initial efficiency of sodium ion batteries, achieve wide application prospects, abundant raw materials, and improve charging and discharging efficiency and the effect of cycle stability

Active Publication Date: 2017-01-04
浙江瓦司特钠科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a kind of biomass hard carbon negative electrode material for sodium ion battery, which solves the problem that the first efficiency of sodium ion battery is too low in the prior art, the first charge and discharge efficiency is as high as 90%, and it has higher specific capacity and stable cycle performance

Method used

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  • Biomass hard carbon negative electrode material for sodium ion battery, preparing method and sodium ion battery
  • Biomass hard carbon negative electrode material for sodium ion battery, preparing method and sodium ion battery
  • Biomass hard carbon negative electrode material for sodium ion battery, preparing method and sodium ion battery

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Embodiment 1

[0055] The biomass hard carbon negative electrode material for sodium ion battery of the present embodiment is prepared by the following method:

[0056] 1) Biomass raw material pretreatment: put the pine cones in a container filled with deionized water and ultrasonically for 30min (ultrasonic power 400W), then rinse with deionized water several times until there is no obvious residue; Put the fruit in a drying oven to dry;

[0057] 2) Pulverization: the pretreated pine cones are pulverized in a pulverizer to obtain precursor particles with a particle size of 400 mesh;

[0058] 3) Firing: Put 10 g of the precursor particles obtained in step 2) into a corundum crucible, place in an open atmosphere tube furnace, and under the protection of Ar atmosphere (argon flow rate is 80 sccm), at a rate of 2 °C / min Heat up to 500°C for 2 hours, then cool down to room temperature with the furnace, filter and remove impurities after deionization, and vacuum dry at 120°C; then, heat up to 12...

Embodiment 2

[0065] The biomass hard carbon negative electrode material for sodium ion battery of the present embodiment is prepared by the following method:

[0066] 1) Biomass raw material pretreatment: put the pine cones in a container filled with deionized water and ultrasonically for 30min (ultrasonic power 400W), then rinse with deionized water several times until there is no obvious residue; Put the fruit in a drying oven to dry;

[0067] 2) Pulverization: the pretreated pine cones are pulverized in a pulverizer to obtain precursor particles with a particle size of 500 mesh;

[0068] 3) Firing: Take 10 g of the precursor particles obtained in step 2) and put them into a corundum crucible, place them in an open atmosphere tube furnace, and under the protection of Ar atmosphere (argon flow rate is 100 sccm), at a rate of 5 ° C / min Heat up to 600°C for 2 hours, then cool down to room temperature with the furnace, filter and remove impurities after deionization cleaning, and vacuum d...

Embodiment 3

[0075] The biomass hard carbon negative electrode material for sodium ion battery of the present embodiment is prepared by the following method:

[0076] 1) Biomass raw material pretreatment: put the pine cones in a container filled with deionized water and ultrasonically for 30min (ultrasonic power 400W), then rinse with deionized water several times until there is no obvious residue; Put the fruit in a drying oven to dry;

[0077] 2) Pulverization: the pretreated pine cones are pulverized in a pulverizer to obtain precursor particles with a particle size of 400 mesh;

[0078] 3) Firing: Take 10 g of the precursor particles obtained in step 2) and put them into a corundum crucible, place them in an open atmosphere tube furnace, and under the protection of Ar atmosphere (argon gas flow rate is 140 sccm), at a rate of 10 °C / min Heat up to 600°C for 3 hours, then cool down to room temperature with the furnace, filter and remove impurities after deionization, and vacuum dry at 1...

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Abstract

The invention relates to a biomass hard carbon negative electrode material for a sodium ion battery, a preparing method and the sodium ion battery and belongs to the technical field of sodium ion energy storage equipment. The biomass hard carbon negative electrode material is prepared through the method including the following steps that firstly, a biomass raw material is smashed, and precursor particles are obtained; secondly, in a protection atmosphere, the precursor particles are heated to 400-600 DEG C to be pre-sintered for 1.5-2.5 h, then cooled to the room temperature along with a furnace, then heated to 800-1600 DEG C to be sintered for 2-5 h and cooled, and an intermediate is obtained; thirdly, the intermediate is put into an alkali solution to be soaked, taken out, then put into an acid solution to be soaked, then washed with water to be neutral and dried, and a purified product is obtained; fourthly, the purified product is subjected to microwave vacuum activation for 3-15 s at the power of 1000-2000 W, and then the biomass hard carbon negative electrode material is obtained. The first-time charging and discharging efficiency of the obtained biomass hard carbon negative electrode material reaches up to 90% or above, the circulation stability is good, the reversible specific capacity is 300 mAh / g or above, and the biomass hard carbon negative electrode material has a good electrochemical property.

Description

technical field [0001] The invention belongs to the technical field of sodium ion energy storage equipment, and specifically relates to a biomass hard carbon negative electrode material for a sodium ion battery, and also relates to a preparation method of a biomass hard carbon negative electrode material for a sodium ion battery and the use of the biomass hard carbon negative electrode material. Carbon anode materials for sodium-ion batteries. Background technique [0002] In recent years, due to the shortage of fossil resources, the development and application of carbon materials have been greatly restricted. Biomass resources such as forestry biomass, agricultural waste, aquatic plants, and energy plants are renewable resources and have become substitutes for fossil resources. Most biomass resources are rich in carbon, so the preparation of various carbon materials from renewable biomass resources has always attracted much attention. [0003] There are many types of batt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583H01M10/05H01M4/133H01M10/0569
CPCH01M4/133H01M4/583H01M10/05H01M10/0569Y02E60/10
Inventor 毛景张涛轩敏杰代克化胡俊华张晓俐邵国胜
Owner 浙江瓦司特钠科技有限公司
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