sns2-c nanocomposite negative electrode material and its preparation method and application

A nano-composite and negative electrode material technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of high production cost, low output, complicated preparation process, etc. The effect of specific surface area and simple preparation process

Active Publication Date: 2018-03-09
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nanomaterials prepared by these methods have some disadvantages, such as high production cost, low yield, and complicated preparation process, which greatly limit their application.

Method used

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  • sns2-c nanocomposite negative electrode material and its preparation method and application
  • sns2-c nanocomposite negative electrode material and its preparation method and application
  • sns2-c nanocomposite negative electrode material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] This embodiment prepares a kind of SnS 2 -C nanocomposite anode material, in which SnS 2 The mass ratio with C is 2:1, and the specific steps are as follows:

[0046] (1) Weighing SnS 2 Powder (purity 99% and particle size 40-60μm) 4g, at the same time select 200g stainless steel metal grinding balls (ball material ratio is 50:1), put them into a 250ml stainless steel grinding tank together, fill in 1 bar of argon (Ar) for Protection; the ball mill jar is placed on the ball mill for the first ball mill to obtain the SnS after ball milling 2 Powder, wherein the ball milling speed is 400rpm, and the ball milling time is 40h.

[0047] (2) SnS after ball milling 2 Add glucose aqueous solution to powder, wherein glucose is 5g. At the same time, 180 grams of stainless steel metal grinding balls (ball-to-material ratio is 20:1) are put into a 250ml stainless steel grinding tank; The time is 30h.

[0048] (3) the mixture obtained in step (2) is dried in an oven, and the ...

Embodiment 2

[0057] This embodiment prepares a kind of SnS 2 -C nanocomposite anode material, in which SnS 2 The mass ratio with C is 1:1, and the specific steps are as follows:

[0058] (1) Weighing SnS 2 4g of powder (purity 99% and particle size 40-60μm), and 120g of stainless steel metal grinding balls (ball-to-material ratio: 30:1) were selected and put into a 250ml stainless steel grinding tank together, and filled with 1 bar of argon (Ar) for protection; Put the ball mill jar on the ball mill for the first ball mill to obtain the SnS after ball milling 2 Powder, wherein the ball milling speed is 500rpm, and the ball milling time is 40h.

[0059] (2) SnS after ball milling 2 Glucose solution is added to the powder, wherein the glucose is 10g. At the same time, 280 grams of stainless steel metal grinding balls (ball-to-material ratio is 20:1) are put into a 250ml stainless steel grinding tank; The time is 30h.

[0060] (3) the mixture obtained in step (2) is dried in an oven, a...

Embodiment 3-4

[0065] In Examples 3 and 4, except SnS 2 Except that the mass ratio of powder and glucose is different from Example 2, other steps are all the same as Example 2, and the SnS of Example 3 and 4 2 The mass ratio of powder and glucose is shown in Table 1, and the SnS 2 See also Table 1 for the mass ratio to C. The performance test of the composite material was carried out in the same manner as in Example 1, and the performance results are shown in Table 1.

[0066] The relevant data sheet of table 1 embodiment 3-4

[0067]

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Abstract

The invention discloses an SnS2-C negative electrode nanocomposite and a preparation method and an application therefor. The composite negative electrode material consists of SnS2 nanoparticles and a carbon material wrapping the SnS2 nanoparticles; the grain diameter of the SnS2 nanoparticles is less than 100 nm, and the SnS2 nanoparticles are uniformly distributed in the carbon material; and the mass ratio of the SnS2 nanoparticles to the carbon material is 0.625-12.5:1. The preparation method for the SnS2-C negative electrode nanocomposite comprises the following steps: performing ball milling on stannic disulphide for the first time to obtain the SnS2 nanoparticles; adding the SnS2 nanoparticles into a glucose solution for performing ball milling for the second time to obtain a mixture; and drying the mixture and then performing thermal treatment on the dried mixture to obtain the SnS2-C nanocomposite. The SnS2-C negative electrode nanocomposite is high in circulation rate capability, high in capacity retention ratio, can be applied to the field of a lithium ion battery, and is bright in the application and industrial prospects.

Description

technical field [0001] The present invention relates to a kind of SnS 2 The -C nanocomposite negative electrode material and its preparation method belong to the technical field of lithium ion battery electrode materials. Background technique [0002] Lithium-ion battery, as an efficient conversion and storage device of chemical energy and electrical energy, is considered as an important energy storage power source for solar energy, wind energy and other new energy sources and the preferred power source for electric vehicles, which has attracted great attention from all over the world. Since their commercialization in the 1990s, lithium-ion batteries have been widely used in portable electronic products such as laptops and mobile phones. With the vigorous development of renewable energy such as solar energy and electric vehicles, there is an increasingly urgent demand for secondary batteries with high specific energy, long life, high safety, high conversion efficiency, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/583H01M4/62B82Y30/00H01M10/0525
CPCB82Y30/00H01M4/362H01M4/5815H01M4/583H01M4/62H01M10/0525Y02E60/10
Inventor 曾宏武英况春江周少雄
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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