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Lithium-ion battery negative electrode material bitumen-based porous carbon/ZnMn2O4 preparation method

A technology of lithium ion battery and negative electrode material, which is applied in battery electrodes, circuits, electrical components, etc., can solve problems such as limiting wide application, and achieve the effect of good application prospect, good product appearance and stable structure.

Inactive Publication Date: 2015-08-05
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Zinc manganese ore (ZnMn 2 o 4 ) has a high theoretical specific capacity, and its application in lithium-ion battery anode materials is one of the hotspots of current research, but the accumulation and collapse in the charging and discharging process limit its wide application

Method used

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  • Lithium-ion battery negative electrode material bitumen-based porous carbon/ZnMn2O4 preparation method
  • Lithium-ion battery negative electrode material bitumen-based porous carbon/ZnMn2O4 preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Weigh 2g of petroleum pitch and dissolve it in 100mL of toluene, weigh the corresponding amount of zinc oxide according to the mass ratio m (nano-zinc oxide): m (pitch) = 2:5, and stir and evaporate to dryness at 110°C. The evaporated mixture was calcined at 800° C. for 1 h under the protection of nitrogen, cooled naturally, washed with 2M hydrochloric acid to remove the nano-zinc oxide template, and dried by suction filtration. After the obtained pitch-based porous carbon was pretreated with concentrated nitric acid at 80°C for 1 h, according to m(ZnMn 2 o 4 ) / m(Pitch-based porous carbon+ZnMn 2 o 4 )=0.3 Add zinc nitrate hexahydrate and manganese nitrate, and dry at 60°C for 12h. The dried product was roasted at 400°C under the protection of nitrogen for 3 hours, and the product was ground through a 200-mesh sieve to obtain the lithium-ion battery negative electrode material pitch-based porous carbon / ZnMn 2 o 4 .

Embodiment 2

[0016] The preparation of pitch-based porous carbon is the same as in Example 1. After the pitch-based porous carbon was pretreated with concentrated nitric acid at 80°C for 1 h, according to m(ZnMn 2 o 4 ) / m(Pitch-based porous carbon+ZnMn 2 o 4 )=0.5 Add zinc nitrate hexahydrate and manganese nitrate. All the other steps are identical with example 1, obtain lithium-ion battery pitch-based porous carbon / ZnMn 2 o 4 Negative material.

Embodiment 3

[0018] The preparation of pitch-based porous carbon is the same as in Example 1. After the pitch-based porous carbon was pretreated with concentrated nitric acid at 80°C for 1 h, according to m(ZnMn 2 o 4 ) / m(Pitch-based porous carbon+ZnMn 2 o 4 )=0.7 Add zinc nitrate hexahydrate and manganese nitrate. All the other steps are identical with example 1, obtain lithium-ion battery pitch-based porous carbon / ZnMn 2 o 4 Negative material.

[0019] For the pitch-based porous carbon / ZnMn synthesized in Examples 1 to 3 2 o 4 Carry out XRD analysis, such as figure 1 As shown, when the mass percent of zinc manganese ore in the composite material is 30, 50 and 70%, the corresponding diffraction peaks are basically the same, and the diffraction angles of each diffraction peak are also roughly the same, and no obvious miscellaneous peaks are found in the figure.

[0020] On the synthesized pitch-based porous carbon / ZnMn 2 o 4 The negative electrode material is made into a battery...

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Abstract

The invention relates to a lithium-ion battery negative electrode material bitumen-based porous carbon / ZnMn2O4 preparation method, and belongs to the category of the new material preparation technology and belongs to the technical field of carbon material and electrochemistry crossing. The preparation method is characterized in that a large amount of inexpensive petroleum bitumen is adopted as a carbon source and nanometer zinc oxide is adopted as a template to prepare bitumen-based porous carbon, washing and drying are performed, then zinc nitrate hexahydrate and manganese nitrate are added, and low-temperature drying and calcination under inert gas protection are sequentially performed so as to obtain the lithium-ion battery bitumen-based porous carbon / ZnMn2O4 negative electrode material, wherein the product has characteristics of high discharge specific capacity and good cycle performance, and is the lithium-ion secondary battery negative electrode material with the good application prospect.

Description

technical field [0001] A Lithium-ion Battery Anode Material Pitch-Based Porous Carbon / ZnMn 2 o 4 The preparation method belongs to the category of new material preparation technology, and belongs to the technical field intersecting carbon materials and electrochemistry. The feature of the present invention is to use large amount and cheap petroleum pitch as carbon source, nano-zinc oxide as template to prepare pitch-based porous carbon, add zinc nitrate hexahydrate and manganese nitrate after washing and drying, and calcining under the protection of inert gas after low-temperature drying , that is, pitch-based porous carbon / ZnMn for lithium-ion batteries 2 o 4 The negative electrode material has high specific capacitance and good cycle performance, and is a lithium ion secondary battery negative electrode material with promising application prospects. Background technique [0002] Compared with other batteries, lithium-ion secondary batteries have many unique advantages,...

Claims

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Application Information

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IPC IPC(8): H01M4/50H01M4/587
CPCH01M4/139H01M4/362H01M4/50H01M4/583Y02E60/10
Inventor 吴明铂李朋刘婧妍刘阳吴文婷尹令红孙启乾李忠涛
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)