Method for preparing selenide ferrous iron nanometer flower

A technology for ferrous selenide and nanoflowers, which is applied in the fields of nanomaterials and electrochemistry, can solve the problems of unfavorable large-scale industrial production, high requirements for synthesis instruments, and high synthesis temperature, and achieves reduced energy consumption, low synthesis temperature, and repeatability. Good results

Inactive Publication Date: 2009-10-21
武汉理工力强能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pulsed laser sputtering method requires high synthesis equipment and high synthesis temperature, which is not conducive to large-scale industrial production

Method used

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  • Method for preparing selenide ferrous iron nanometer flower
  • Method for preparing selenide ferrous iron nanometer flower
  • Method for preparing selenide ferrous iron nanometer flower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Ferrous selenide (FeSe 2 ) the preparation method of nano flower, it comprises the steps:

[0024] 1) Dissolve 0.1 mol of selenium powder in 100 mL of deionized water to obtain a selenium solution; then add the selenium solution and 0.1 mol of sodium sulfite into a dilute ammonia solution with pH = 11, heat to 90°C and stir for 2 hours to obtain Na 2 SeSO 3 solution, spare;

[0025] 2) Add 10 g of polyvinyl alcohol into 100 mL of distilled water (the average degree of polymerization of polyvinyl alcohol is 124), heat to 90°C and stir for 2 hours to obtain an aqueous solution of polyvinyl alcohol, which is set aside;

[0026] 3) 2.5mmol FeC 2 o 4 , add 5ml of 1M citric acid, 25mL of Na 2 SeSO 3 solution and 25mL polyvinyl alcohol aqueous solution, stir until the solution is uniform, and finally adjust the pH value of the system to 9 with dilute hydrochloric acid and dilute ammonia water to obtain a uniform rheological phase substance;

[0027] 4) Move the rheologi...

Embodiment 2

[0035] Ferrous selenide (FeSe 2 ) the preparation method of nano flower, it comprises the steps:

[0036] 1) Dissolve 0.1 mol of selenium powder in 100 mL of deionized water to obtain a selenium solution; then add the selenium solution and 0.1 mol of sodium sulfite into a dilute ammonia solution with pH = 11, heat to 90°C and stir for 2 hours to obtain Na 2 SeSO 3 solution, spare;

[0037] 2) Add 10g of polyvinyl alcohol into 100mL of distilled water, heat to 90°C and stir for 2 hours to obtain an aqueous solution of polyvinyl alcohol, which is set aside;

[0038] 3) 2.5mmol FeC 2 o 4 , add 5ml of 1M citric acid, 20mL of Na 2 SeSO 3 solution and 30mL polyvinyl alcohol aqueous solution, stir until the solution is uniform, and finally adjust the pH value of the system to 9 with dilute hydrochloric acid and dilute ammonia water to obtain a uniform rheological phase substance;

[0039] 4) Move the rheological phase substance obtained in step 3) into a 100mL polytetrafluoroe...

Embodiment 3

[0043] Ferrous selenide (FeSe 2 ) the preparation method of nano flower, it comprises the steps:

[0044] 1) Dissolve 0.1 mol of selenium powder in 100 mL of deionized water to obtain a selenium solution; then add the selenium solution and 0.1 mol of sodium sulfite into a dilute ammonia solution with pH = 11, heat to 90°C and stir for 2 hours to obtain Na 2 SeSO 3 solution, spare;

[0045] 2) Add 10g of polyvinyl alcohol into 100mL of distilled water, heat to 90°C and stir for 2 hours to obtain an aqueous solution of polyvinyl alcohol, which is set aside;

[0046] 3) 2.5mmol FeC 2 o 4 , add 5ml of 1M citric acid, 30mL of Na 2 SeSO 3 solution and 20mL polyvinyl alcohol aqueous solution, stir until the solution is uniform, and finally adjust the pH value of the system to 10 with dilute hydrochloric acid and dilute ammonia water to obtain a uniform rheological phase substance;

[0047] 4) Move the rheological phase substance obtained in step 3) into a 100mL polytetrafluoro...

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Abstract

The invention relates to a method for preparing a selenide ferrous iron nanometer flower. The material can be used as an active material of an anode of a lithium ion battery. The method for preparing the selenide ferrous iron nanometer flower comprises the following steps that: according to the ratio of 0.1 mol:0.1 mol:100 mL, selenium powder, sodium sulfite and deionized water are picked up, heated and stirred to obtain a solution of Na2SeSO3; 2) according to the ratio of 10g:100 mL, polyvinyl alcohol and distilled water are picked up, heated and stirred to obtain a water solution of polyvinyl alcohol; 3) according to the ratio of 2.5 mmol:5 mL:20 to 30 mL : 20 to 30 mL, F3C2O4, citric acid with the concentration of 1 M, the solution of Na2SeSO3 and the water solution of polyvinyl alcohol are picked up, mixed and stirred, and by adjusting the pH value of the system to be 8-10, an even rheological phase matter is obtained; 4) the obtained matter is kept at a temperature of between 160 and 180 for 10 to 24 hours and then naturally cooled to obtain a hydrothermal product; 5) the hydrothermal product is subjected to centrifugal separation; and 6) the hydrothermal product is dried to obtain the red brown selenide ferrous iron nanometer flower. The method has the characteristics of simple process and low synthetic temperature.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, in particular to a ferrous selenide (FeSe 2 ) The preparation method of nano flower, this material can be used as lithium ion battery cathode active material. Background technique [0002] Since Poizot et al. reported the lithium electrochemical behavior of transition metal oxide materials in 2000, compounds based on transition metals such as iron, cobalt, and nickel are considered to be a new class of lithium storage materials with great development potential. Research groups and Scientists have studied it extensively. Among these materials, iron compounds have more advantages than other transition metal compounds because iron has many advantages such as abundant reserves, low price, and environmental friendliness. On the other hand, nanomaterials have attracted widespread attention in the field of lithium-ion batteries due to their special structures and effects. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/04B82B3/00B82B1/00H01M4/58
CPCY02E60/12Y02E60/10
Inventor 麦立强陈文高媛
Owner 武汉理工力强能源有限公司
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