Preparation method and application of double-hetero-element-doped porous carbon nanorod negative electrode material

A technology of negative electrode materials and heteroelements is applied in the field of negative electrode materials for lithium/sodium ion batteries, and achieves the effects of good large-scale application potential, simple operation process, and cheap preparation of raw materials

Inactive Publication Date: 2019-05-03
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the synthesis of heteroelement-doped porous carbon nanorods one-dimensional carbon materials is technically difficult.

Method used

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  • Preparation method and application of double-hetero-element-doped porous carbon nanorod negative electrode material
  • Preparation method and application of double-hetero-element-doped porous carbon nanorod negative electrode material
  • Preparation method and application of double-hetero-element-doped porous carbon nanorod negative electrode material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Disperse 1.71 g of ammonium persulfate in 60 mL of deionized water, add 1 g of LuDOX-40 SiO 2 (40nm) gel and 1g of phytic acid aqueous solution, fully ultrasonically stirred under ice bath conditions until uniform dispersion; another 0.55mL aniline was dispersed in 60mL deionized water, fully ultrasonically stirred under ice bath conditions until uniformly dissolved, then stirred at high speed In the case of , quickly pour the prepared solution into the solution in the previous step, let it sit for 24 hours, then filter it with suction, wash it with deionized water for 3 to 5 times, and dry it in vacuum at 70°C for 3 to 5 hours to prepare a blue-black precipitate; The precipitate was treated at 600 °C for 12 h under Ar protection gas, treated with 10% dilute HF acid solution for 12 h, washed with deionized water for 3 to 5 times, and vacuum-dried at 70 °C for 3 h to prepare heteroelement-doped porous carbon nanorod material.

[0027] After the sintered material was ful...

Embodiment 2

[0029] Disperse 0.8 g of ammonium persulfate in 60 mL of deionized water, add 1 g of JK-5-25 SiO 2 (5nm) gel and 1g of phytic acid aqueous solution, fully ultrasonically stirred under ice bath conditions until uniformly dispersed; another 0.275 mL of aniline was dispersed in 60mL deionized water, fully ultrasonically stirred under ice bath conditions until uniformly dissolved, and stirred at high speed In the case of , quickly pour the prepared solution into the solution in the previous step, let it sit for 24 hours, then filter it with suction, wash it with deionized water for 3 to 5 times, and dry it in vacuum at 70°C for 3 to 5 hours to prepare a blue-black precipitate; The precipitate was treated at 700 °C for 12 h under Ar protection gas, treated with 15% dilute HF acid solution for 8 h, washed with deionized water for 3 to 5 times, and vacuum-dried at 70 °C for 3 h to prepare heteroelement-doped porous carbon nanorod material.

[0030] After the sintered material was fu...

Embodiment 3

[0032] Disperse 2.4 g of ammonium persulfate in 60 mL of deionized water, add 5 g of JK-5-25 SiO 2(5nm) and 1.65 g of phytic acid aqueous solution, fully ultrasonically stirred under ice bath conditions until uniform dispersion; another 0.55 mL of aniline was dispersed in 60 mL of deionized water, fully ultrasonically stirred under ice bath conditions until uniformly dissolved, then stirred at high speed In the case of , quickly pour the prepared solution into the solution in the previous step, let it sit for 24 hours, then filter it with suction, wash it with deionized water for 3 to 5 times, and dry it in vacuum at 70°C for 3 to 5 hours to prepare a blue-black precipitate; The precipitate was treated at 1000 °C for 5 h under the protective gas of He gas, treated with 20% dilute HF acid solution for 5 h, washed with deionized water for 3 to 5 times, and dried in vacuum at 70 °C for 3 h to prepare heteroelement-doped porous carbon nanorod material.

[0033] After the sintered...

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Abstract

The invention discloses a preparation method and application of a double-hetero-element-doped porous carbon nanorod negative electrode material. The method comprises adding SiO2 gel and a phytic acidaqueous solution to an aqueous solution of ammonium persulfate; fully dispersing the SiO2 gel and the phytic acid aqueous solution; under an ice bath condition, rapidly mixing and stilly placing an aqueous solution of conductive polymer monomer aniline; fully drying the obtained mixture by centrifugation and washing; subjecting the mixture to a high-temperature carbonization treatment; and removing the SiO2 by an aqueous solution of hydrofluoric acid to obtain the double-hetero-element-doped porous carbon nanorod negative electrode material. According to the characteristics of the negative electrode material of a lithium battery and a sodium battery in the charge and discharge cycle, the method, by introducing hetero atoms (N, P) into the carbon material for double doping and designing a pore structure having a uniform distribution and a proper number in the carbon, increases the lithium/sodium specific capacity and improves the electrochemical performance of the electrode material. The method is low in preparation material cost, simple in operation process, high in yield, and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of negative electrode materials for lithium / sodium ion batteries, in particular to a preparation method and application of a double-heteroelement-doped porous carbon nanorod negative electrode material. Background technique [0002] Lithium / sodium ion batteries have the advantages of high open circuit voltage, high energy density, long service life, no memory effect, less pollution, and low self-discharge rate. It is the most ideal power supply for portable electronic equipment and electric vehicles. Although the traditional lithium / sodium-ion battery anode material graphite has good cycle stability and high cost performance, it is difficult to meet the needs of power systems, especially electric vehicles, due to its low charge-discharge specific capacity and volume-specific capacity as a sodium-ion battery anode material. Vehicles and hybrid electric vehicles require high battery capacity. Therefore, it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62
CPCY02E60/10
Inventor 岳鹿张文惠张婷婷沈超陈进马晓燕关荣锋
Owner YANCHENG INST OF TECH
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