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SnS2-C negative electrode nanocomposite and preparation method and application therefor

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: 2016-03-16
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 negative electrode nanocomposite and preparation method and application therefor
  • SnS2-C negative electrode nanocomposite and preparation method and application therefor
  • SnS2-C negative electrode nanocomposite and preparation method and application therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0046] (1) Weigh SnS 2 4g powder (purity 99% and particle size 40-60μm), and at the same time select 200g stainless steel metal grinding balls (ball-to-battery ratio: 50:1), put them into a 250ml stainless steel grinding tank, and fill with 1bar argon (Ar) for protection ; Put the ball mill jar on the ball mill for the first ball milling to obtain the SnS after ball milling 2 For powder, the ball milling speed is 400 rpm and the ball milling time is 40 hours.

[0047] (2) SnS after ball milling 2 An aqueous solution of glucose is added to the powder, in which glucose is 5g. At the same time, put 180 grams of stainless steel metal grinding balls (ball-to-material ratio: 20:1) into a 250ml stainless steel grinding jar; place the ball mill jar on the ball mill for the second ball milling to obtain the mixture, where the ba...

Embodiment 2

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

[0058] (1) Weigh SnS 2 4g powder (purity 99% and particle size 40-60μm), and 120g stainless steel metal grinding balls (ball-to-battery ratio: 30:1) are selected and placed in a 250ml stainless steel grinding tank, filled with 1bar argon (Ar) for protection; Place the ball milling jar on the ball mill for the first ball milling to obtain the SnS after ball milling 2 For powder, the ball milling speed is 500 rpm and the ball milling time is 40 hours.

[0059] (2) SnS after ball milling 2 Add glucose solution to the powder, where glucose is 10g. At the same time, put 280 grams of stainless steel metal grinding balls (the ball-to-material ratio is 20:1) into a 250ml stainless steel grinding jar; place the ball mill jar on the ball mill for the second ball milling to obtain the mixture, where the ball milling speed is 200 r...

Embodiment 3-4

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

[0066] Table 1 Related data table of Example 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 SnS 2 -C nano composite negative electrode material and preparation method thereof belong to the technical field of lithium ion battery electrode materials. Background technique [0002] Lithium-ion batteries, as a highly efficient conversion and storage device of chemical energy and electric energy, are regarded as important energy storage power sources for new energy sources such as solar energy and wind energy and the preferred power source for electric vehicles, and have attracted great attention from countries all over the world. Since its commercialization in the 1990s, lithium-ion batteries have been widely used in portable electronic products such as notebook computers and mobile phones. With the vigorous development of renewable energy such as solar energy and electric vehicles, the demand for secondary batteries with high specific energy, long life, high safety, high conversion efficiency, and low cost has become...

Claims

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Application Information

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Patent Type & Authority Applications(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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