Preparing method and application of lithium ion battery cathode material selenium ferrous sulfide

A lithium ion battery and ferrous sulfide technology, applied in the field of electrochemistry, can solve the problems of lack of ferrous selenium sulfide negative electrode material, etc., and achieve the effects of high rate performance, simple operation and simple process

Inactive Publication Date: 2015-04-01
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a preparation method and application of ferrous selenium sulfide, a li

Method used

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  • Preparing method and application of lithium ion battery cathode material selenium ferrous sulfide
  • Preparing method and application of lithium ion battery cathode material selenium ferrous sulfide
  • Preparing method and application of lithium ion battery cathode material selenium ferrous sulfide

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preparation example Construction

[0017] Such as figure 1 As shown, the preparation method of the negative electrode material ferrous selenium sulfide of the embodiment of the present invention comprises the following steps:

[0018] S101: Put the iron powder, selenium powder and sulfur powder together into a mortar and grind them until they are evenly mixed, and press them with a grinding tool to form a circular target with a diameter of 1.4 cm, and the forming pressure is 2-10 MPa;

[0019] S102: Put the pressed target material into the ceramic boat and put it in the center of the tube furnace, continuously feed the protective gas argon, set the temperature rise program, the temperature rise rate is 5-10°C / min, heat up to 500-800°C and then keep it warm for 1~ 6h, then naturally cooled to room temperature to obtain ferrous selenium sulfide powder;

[0020] S103: After the sintered ferrous selenium sulfide powder is uniformly ground with a mortar, it is put into a ball mill jar and ball milled for 4-10 hour...

Embodiment 1

[0032] (1) Iron powder, selenium powder and sulfur powder mixed pressing target:

[0033] Put the iron powder, selenium powder and sulfur powder together into the mortar and grind them until they are evenly mixed, and press them into a circular target with a diameter of 1.4 with a molding pressure of 6 MPa;

[0034] (2) Under an argon protective atmosphere, sinter ferrous selenium sulfide with a tube furnace:

[0035] Put the pressed target into the ceramic boat and put it in the center of the tube furnace, continuously feed the protective gas argon, set the heating program, the heating rate is 5°C / min, heat it to 700°C and keep it for 2h, and then cool it down to room temperature naturally. Obtain ferrous selenium sulfide powder;

[0036] (3) the ferrous selenium sulfide powder ball mill of gained:

[0037] After the powder of the sintered ferrous selenium sulfide is uniformly ground with a mortar, it is put into a ball mill pot and ball milled for 6 hours to obtain a unifo...

Embodiment 2

[0041] (1) Iron powder, selenium powder and sulfur powder mixed pressing target:

[0042] Put the iron powder, selenium powder and sulfur powder together into the mortar and grind them until they are evenly mixed, and press them into a circular target with a diameter of 1.4 with a molding pressure of 6 MPa;

[0043] (2) Under an argon protective atmosphere, sinter ferrous selenium sulfide with a tube furnace:

[0044] Put the pressed target into the ceramic boat and put it in the center of the tube furnace, continuously feed the protective gas argon, set the heating program, the heating rate is 5°C / min, heat it to 700°C and keep it for 2h, and then cool it down to room temperature naturally. Obtain ferrous selenium sulfide powder;

[0045] (3) the ferrous selenium sulfide powder ball mill of gained

[0046] After the powder of the sintered ferrous selenium sulfide is uniformly ground with a mortar, it is put into a ball mill pot and ball milled for 6 hours to obtain a unifor...

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Abstract

The invention discloses a preparing method and application of lithium ion battery cathode material selenium ferrous sulfide. The method includes the steps that iron powder, selenium powder and sulfur powder are subjected to mixed target pressing; under the protective atmosphere of argon, selenium ferrous sulfide is sintered through a tube furnace; ball grinding is performed. The prepared selenium ferrous sulfide is used as a lithium ion battery cathode material. The preparing method is easy to operate, simple in process and suitable for large-scale production. The selenium ferrous sulfide cathode material is high in specific capacity, circulating performance and rate performance and is a lithium ion battery cathode material high in performance.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a preparation method and application of ferrous selenium sulfide, a negative electrode material. Background technique [0002] With the development of economy and technology, lithium-ion batteries have achieved great success in portable devices, and in terms of large-scale application prospects, such as electric vehicles, the prospects of lithium-ion batteries have greatly promoted the development of the lithium battery industry. However, the current commercial lithium-ion batteries are based on the traditional intercalation and extraction mechanism of electrode materials. Due to their low energy density, their application in the electric vehicle industry is greatly limited. Therefore, electrode materials with large capacity and high energy density are developed to replace Traditional electrode materials with small capacity and low energy density have become ...

Claims

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Application Information

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IPC IPC(8): H01M4/58
CPCH01M4/5815Y02E60/10
Inventor 崔艳华刘家斌刘效疆
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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