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Tin sulfide-titanium dioxide compound and preparation method and application thereof

A technology of titanium dioxide and tin disulfide, applied in the field of tin disulfide-titanium dioxide composite and its preparation, can solve problems such as poor structural stability and volume expansion, and achieve the effects of low cost, avoiding processing steps and high yield

Inactive Publication Date: 2018-03-13
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, SnS 2 The material has two fatal disadvantages: poor structural stability and severe volume expansion during charge and discharge

Method used

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  • Tin sulfide-titanium dioxide compound and preparation method and application thereof
  • Tin sulfide-titanium dioxide compound and preparation method and application thereof
  • Tin sulfide-titanium dioxide compound and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) 0.235g (2.94mmol) spindle-shaped nano-TiO prepared by hydrothermal method 2 , 1.400g (3.99mmol) tin chloride pentahydrate (SnCl 4 ·5H 2 O) and 1.500g (20mmol) thioacetamide (CH 3 CSNH 2 ) was dispersed in absolute ethanol, and at room temperature, magnetically stirred for 1 h to prepare a suspension;

[0032] (2) Transfer the suspension obtained in step (1) to a 200ml high-pressure hydrothermal reaction kettle, seal it well, heat up to 160°C in a heating box and keep it warm for 12h, then cool naturally;

[0033] (3) The turbid liquid obtained in step (2) was filtered to collect the precipitate, washed three times with deionized water and absolute ethanol, and then vacuum-dried at 80° C. for 12 hours to obtain the tin disulfide-titanium dioxide composite (SnS 2 / TiO 2 ).

[0034] SnS for comparison 2 The preparation method:

[0035] No spindle-shaped nano-TiO was added in step (1) 2 , repeating steps (1)-(3) to obtain the comparison product coiled SnS 2 .

...

Embodiment 2

[0043] (1) 0.235g of spindle-shaped nano-TiO prepared by hydrothermal method 2 , 1.400g tin chloride pentahydrate (SnCl 4 ·5H 2 O) and 1.500g thioacetamide (CH 3 CSNH 2 ) was dispersed in absolute ethanol, and at room temperature, magnetically stirred for 1 h to prepare a suspension;

[0044] (2) Transfer the suspension obtained in step (1) to a 200ml high-pressure hydrothermal reactor, seal it well, heat it up to 170°C in a heating box and keep it warm for 12 hours, then cool it down naturally;

[0045] (3) The turbid liquid obtained in step (2) was filtered to collect the precipitate, washed three times with deionized water and absolute ethanol, and then vacuum-dried at 80° C. for 12 hours to obtain the tin disulfide-titanium dioxide composite (SnS 2 / TiO 2 ).

[0046] SnS for comparison 2 The preparation method:

[0047] No addition of nano-spindle TiO in step (1) 2 , repeating steps (1)-(3) to obtain the comparison product coiled SnS 2 .

[0048] SnS obtained in...

Embodiment 3

[0054] (1) 0.235g of nano-spindle TiO prepared by hydrothermal method 2 , 1.400g tin chloride pentahydrate (SnCl 4 ·5H 2 O) and 1.500g thioacetamide (CH 3 CSNH 2 ) was dispersed in absolute ethanol, and at room temperature, magnetically stirred for 1 h to prepare a suspension;

[0055] (2) Transfer the suspension obtained in step (1) to a 200ml high-pressure hydrothermal reactor, seal it well, raise the temperature to 160°C in a heating box, keep it warm for 18 hours, and then cool it down naturally;

[0056] (3) The turbid liquid obtained in step (2) was filtered to collect the precipitate, washed three times with deionized water and absolute ethanol, and then vacuum-dried at 80° C. for 12 hours to obtain the tin disulfide-titanium dioxide composite (SnS 2 / TiO 2 ).

[0057] SnS for comparison 2 The preparation method:

[0058] No addition of nano-spindle TiO in step (1) 2 , repeating steps (1)-(3) to obtain the comparison product coiled SnS 2 .

[0059] SnS obtain...

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Abstract

The invention belongs to the field of a lithium ion battery material, and discloses a tin sulfide-titanium dioxide compound and a preparation method and an application thereof. The preparation methodcomprises the steps of enabling nanometer TiO<2>, SnCl<4>.5H<2>O and CH<3>CSNH<2> to be dispersed in a solvent, and performing stirring and mixing uniformly to obtain a turbid liquid; next, transferring the turbid liquid to a hydrothermal reaction kettle, heating to 140-180 DEG C and performing thermal insulation and carrying out a reaction for 10-20h, and then performing natural cooling; and filtering the reaction liquid, collecting precipitates, and performing washing and drying to obtain the tin sulfide-titanium dioxide compound. The product is prepared by adopting a hydrothermal method through a one-step reaction, and the synthesis method is simple and easy to implement, low in cost, high in yield and energy saving and environment friendly; and the prepared tin sulfide-titanium dioxidecompound has high discharge capacity, high cycle stability and rate capability, and is a relatively promising negative electrode material of the lithium ion battery.

Description

technical field [0001] The invention belongs to the field of lithium ion battery materials, and in particular relates to a tin disulfide-titanium dioxide composite and a preparation method and application thereof. Background technique [0002] In recent years, the depletion of traditional fossil energy has become increasingly serious, and environmental problems such as the greenhouse effect and acid rain caused by the long-term use of traditional fossil energy have become increasingly serious. Therefore, it is necessary to develop new clean energy sources to alleviate and solve the above problems from the source. In the new clean energy, lithium-ion batteries have become a research hotspot as early as the end of the 20th century because of their advantages such as high energy density, small self-discharge, good cycle performance, no memory effect, and safety and pollution-free. And it has been widely used in portable mobile devices: such as mobile phones, cameras, notebook ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/362H01M4/485H01M4/62H01M10/0525Y02E60/10
Inventor 巫艺文曾荣华叶永键李卓羲
Owner SOUTH CHINA NORMAL UNIVERSITY
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