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Preparation method and application of biomass carbon/Ga2O3 composite material

A composite material, biomass carbon technology, applied in the field of electrochemical power supply, can solve the problems of low conductivity, poor electrochemical reaction kinetics, unsatisfactory cycle performance, etc., and achieves low cost, wide biomass sources, and good cycle. The effect of stability

Inactive Publication Date: 2020-04-24
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the intrinsically low electrical conductivity makes Ga 2 o 3 Poor electrochemical reaction kinetics, leading to unsatisfactory cycle performance

Method used

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  • Preparation method and application of biomass carbon/Ga2O3 composite material
  • Preparation method and application of biomass carbon/Ga2O3 composite material
  • Preparation method and application of biomass carbon/Ga2O3 composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Cattail ears (such as figure 1 ) in sodium hydroxide solution for 2 hours, then cleaned with deionized water, and then transferred to a blast drying oven at 80°C for drying; take 2mL of nitric acid and add 8mL of deionized water, stir well and add 1mmolGa(NO 3 ) 3 ·xH 2 0, then add 1.2g of treated cattail ears to the solution, ultrasonically treat it for 2h, and then transfer it to 80°C blast drying oven for drying; after the material is dried, it is placed in N 2 In the environment, at a heating rate of 3°C / min, calcined at 500°C for 5h to obtain biomass carbon / Ga 2 o 3 composite material. The prepared samples were analyzed by XRD patterns as follows: figure 2 As shown, there is a broad diffraction peak at 25°, corresponding to amorphous C, due to Ga 2 o 3 Poor crystallinity, no Ga in the picture 2 o 3 Diffraction peaks. like image 3 For the prepared biomass carbon / Ga 2 o 3 Cyclic voltammetry curves of the composite lithium-ion battery negative electrode...

Embodiment 2

[0029] Cattail ears (such as figure 1 ) in sodium hydroxide solution for 2 hours, then cleaned with deionized water, and then transferred to a blast drying oven at 80°C for drying; take 2mL of nitric acid and add 8mL of deionized water, stir well and add 1mmolGa(NO 3 ) 3 ·xH 2 0, then add 1.2g of treated cattail ears to the solution, ultrasonically treat it for 2h, and then transfer it to 80°C blast drying oven for drying; after the material is dried, it is placed in N 2 In the environment, at a heating rate of 3°C / min, calcined at 600°C for 5h to obtain biomass carbon / Ga 2 o 3 composite material.

[0030] The material obtained in Example 2 was made into a battery according to the method in Example 1. like Figure 6 As shown, the first charge and discharge specific capacities are 482.7 and 966.6mAh g respectively -1 , there is an obvious charging and discharging platform, and after 50 cycles, the charging and discharging capacities are 437.7 and 439.6mAh g respectively ...

Embodiment 3

[0032] Cattail ears (such as figure 1 ) in sodium hydroxide solution for 2 hours, then cleaned with deionized water, and then transferred to a blast drying oven at 80°C for drying; take 2mL of nitric acid and add 8mL of deionized water, stir well and add 1mmolGa(NO 3 ) 3 ·xH 2 0, then add 1.2g of treated cattail ears to the solution, ultrasonically treat it for 2h, and then transfer it to 80°C blast drying oven for drying; after the material is dried, it is placed in N 2 In the environment, at a heating rate of 3°C / min, calcined at 700°C for 5h to obtain biomass carbon / Ga 2 o 3 composite material.

[0033] The material obtained in Example 3 was made into a battery according to the method in Example 1. like Figure 7 As shown, the first charge and discharge specific capacities are 497.4 and 991.0mAh g respectively -1 , with obvious charge and discharge platforms, after 50 cycles, the charge and discharge capacities are 447.6 and 448.7mAh g respectively -1 , showing good...

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Abstract

The invention provides a preparation method of a biomass carbon / Ga2O3 composite material and an application of the biomass carbon / Ga2O3 composite material as a lithium ion battery negative electrode material. The method comprises the following specific steps: ultrasonically treating typha orientalis clusters in a sodium hydroxide solution, cleaning the typha orientalis clusters with deionized water, and drying the typha orientalis clusters; adding a certain amount of nitric acid into deionized water, uniformly stirring the nitric acid and the deionized water, adding a proper amount of Ga(NO3)3.xH2O, adding a proper amount of treated typha orientalis clusters into the solution, and ultrasonically drying the typha orientalis clusters; and drying the material, placing the material in an N2 environment, and calcining the material at 500-700 DEG C to obtain the biomass carbon / Ga2O3 composite material. According to the invention, the biomass (typha angustifolia) carbon / Ga2O3 composite material is used as the lithium ion battery negative electrode material for the first time, and shows good electrochemical performance.

Description

technical field [0001] The invention relates to a lithium ion battery negative electrode material, in particular to a biomass (cattail) carbon / Ga 2 o 3 The composite material is used as a negative electrode material and a preparation method thereof, belonging to the field of electrochemical power sources. Background technique [0002] With the rapid development of social economy, people's dependence on energy continues to increase. At present, traditional fossil energy such as coal, oil, and natural gas are widely used, and problems such as air pollution and energy crisis are becoming more and more prominent, directly affecting people's lives. Therefore, people are actively looking for alternative clean energy sources. Solar energy, wind energy, water energy, and nuclear energy are all renewable new energy sources. However, due to their randomness, intermittent nature, and difficulty in storage, it is difficult to apply them stably in daily life. . In order to improve th...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/485H01M4/62H01M10/0525
CPCH01M4/362H01M4/485H01M4/625H01M10/0525H01M2004/027Y02E60/10
Inventor 倪世兵许真徐杰杨学林
Owner CHINA THREE GORGES UNIV
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