Preparation method of hexagonal-prism-shaped iron-cobalt double-metal selenide

A bimetal and selenide technology, applied in the field of inorganic materials, can solve the problems of agglomeration or uneven composition, irregular material morphology, etc., and achieve the effects of small distance, uniform particle size distribution, and good electrical conductivity.

Active Publication Date: 2020-03-06
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

There are also some methods that use co-precipitation to synthesize precursors and synthesize materials through high-temperature treatment. Compared with hydrothermal methods, the operation is simpler, safer, energy-saving, large in output, and short in synthesis cycle, but often due to excessive local concentration, agglomeration or The composition is not uniform enough, so that the shape of the material is relatively irregular

Method used

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  • Preparation method of hexagonal-prism-shaped iron-cobalt double-metal selenide
  • Preparation method of hexagonal-prism-shaped iron-cobalt double-metal selenide
  • Preparation method of hexagonal-prism-shaped iron-cobalt double-metal selenide

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Effect test

Embodiment 1

[0035] A preparation method with hexagonal iron-cobalt double metal selenide, comprising the following steps:

[0036] S1. Take 0.4040g Fe(NO 3 ) 3 •9H 2 O and 0.2911g Co(NO 3 ) 2 •6H 2 O was dissolved in 50mL of isopropanol, which was designated as solution A;

[0037] S2. Dissolve 1.0g of PVP (Mw=10000) in 50mL of isopropanol, and record it as solution B;

[0038] S3. Take 1.6802g NaHCO 3 Dissolve in 100mL deionized water, and record it as solution C;

[0039] S4. After mixing solution B and solution A, sonicate for 15 minutes, add solution C dropwise under magnetic stirring in an oil bath; keep the temperature of the oil bath at 40°C for 12 hours, and wash with ethanol and deionized water for several times after the reaction. The precipitate was collected by vacuum drying at ℃ for 24 h;

[0040] S6. The prepared iron-cobalt precursor and selenium powder are respectively placed on both ends of a porcelain boat and evenly paved, and the mass ratio is 1:2;

[0041] S7 ...

Embodiment 2

[0043] Repeat the steps of Example 1, and adjust the oil bath in S4 to an ice bath at 0°C.

Embodiment 3

[0045] The steps of Example 1 were repeated, and the temperature of the oil bath in S4 was adjusted to 20°C.

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Abstract

The invention belongs to the field of inorganic materials, and particularly relates to a preparation method of hexagonal-prism-shaped iron-cobalt double-metal selenide. The preparation method comprises the following steps: S1, mixing and dissolving iron salt and cobalt salt in isopropanol; S2, preparing a PVP isopropanol solution; S3, preparing a NaHCO3 aqueous solution; S4, mixing the solutions obtained in the step S1 and the step S2 according to a volume ratio of 1:(1-3), and carrying out ultrasonic treatment for 10-20 minutes; S5, adding the mixed solution obtained in the step S4 into the NaHCO3 aqueous solution to obtain an iron-cobalt metal precursor; and S6, mixing the iron-cobalt metal precursor obtained in the step S5 with selenium powders according to a mass ratio of 1: (1-3), andcarrying out calcining for 3-5 hours. The iron-cobalt bimetal selenium composite carbon material prepared by the preparation method provided by the invention has relatively stable cycle life and ratecapability; and the conductivity of the material can be enhanced by doping carbon, so that the specific capacity of a battery is improved.

Description

technical field [0001] The invention belongs to the field of inorganic materials, and in particular relates to a preparation method of a hexagonal columnar iron-cobalt double metal selenide. Background technique [0002] Energy storage is a hot topic of discussion in the scientific research community today. At present, the main energy storage technologies include physical, phase change, electromagnetic and electrochemical energy storage. The battery technology in electrochemical energy storage has made great breakthroughs, especially lithium-ion batteries. Its rapid development has promoted the development of the entire energy market and opened up a new path for the energy market. At the same time, the demand for lithium-ion batteries has The rapid increase constantly stimulates the development of new battery technology. However, lithium is a relatively scarce element on the earth, and its development requires high technology, so its cost as a lithium-ion battery is also r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/054B82Y30/00B82Y40/00
CPCH01M4/362H01M4/581H01M4/62H01M4/625H01M4/628H01M10/054B82Y30/00B82Y40/00Y02E60/10
Inventor 王新李业宝张永光
Owner INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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