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Preparation method of SnS2 nanoplate anode material of a lithium-ion battery

A technology of lithium-ion batteries and negative electrode materials, which is applied in the direction of electrode manufacturing, battery electrodes, circuits, etc., to achieve the effect of good cycle stability

Inactive Publication Date: 2009-12-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, with L-cysteine ​​and SnCl 4 Solution One-step Aqueous Synthesis of SnS for Li-ion Batteries 2 Nanosheet anode materials have not been reported yet

Method used

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  • Preparation method of SnS2 nanoplate anode material of a lithium-ion battery
  • Preparation method of SnS2 nanoplate anode material of a lithium-ion battery
  • Preparation method of SnS2 nanoplate anode material of a lithium-ion battery

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Experimental program
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Effect test

Embodiment 1

[0018] 1) Dissolve 0.98g (8mmol) L-cysteine ​​in 160ml deionized water, then add 0.70g (2mmol) tin tetrachloride (SnCl 4 ·5H 2 O), and stirred to make it dissolve, L-cysteine ​​and SnCl in the mixed solution 4 The molar ratio is 4:1.

[0019] 2) The obtained mixed solution was transferred to a polytetrafluoroethylene liner reactor, sealed, and the reactor was kept at 180° C. for 8 hours, and then naturally cooled to room temperature. The precipitate was separated by centrifugation, washed thoroughly with deionized water and absolute ethanol, and dried in vacuum to obtain the SnS 2 Nanosheet anode materials.

[0020] X-ray diffraction (XRD) analysis and transmission electron microscope (TEM) observation results show that the obtained product is SnS 2 Nanosheets (see figure 1 and figure 2 ).

[0021] 3) Electrochemical performance test: an appropriate amount of SnS 2 The nano sheet negative electrode material, the conductive agent acetylene black, and 5% of the binder p...

Embodiment 2

[0023] 1) Dissolve 1.45g (12mmol) L-cysteine ​​in 150ml deionized water, then add 0.7g (2mmol) tin tetrachloride (SnCl 4 ·5H 2 O), and stirred to make it dissolve, L-cysteine ​​and SnCl in the mixed solution 4 The molar ratio is 6:1.

[0024] 2) The obtained mixed solution was transferred to a polytetrafluoroethylene liner reactor, sealed, and the reactor was kept at 190°C for 12 hours, and then naturally cooled to room temperature. The precipitate was separated by centrifugation, washed thoroughly with deionized water and absolute ethanol, and dried in vacuum to obtain the SnS 2 Nanosheet anode materials. X-ray diffraction (XRD) analysis and transmission electron microscope (TEM) observation results show that the obtained product is SnS 2 Nanosheets (see image 3 )

[0025] 3) by the 3rd of embodiment 1) the method for step is assembled into test cell, and by the 3rd of embodiment 1) the test method test SnS of step 2 Electrochemical lithium storage performance of nano...

Embodiment 3

[0027] 1) Dissolve 1.45g (12mmol) L-cysteine ​​in 150ml deionized water, then add 0.52g (1.5mmol) tin tetrachloride (SnCl 4 ·5H 2 O), and stirred to make it dissolve, L-cysteine ​​and SnCl in the mixed solution 4 The molar ratio is 8:1.

[0028] 2) The obtained mixed solution was transferred to a polytetrafluoroethylene liner reactor, sealed, and the reactor was kept at 220° C. for 8 hours, and then naturally cooled to room temperature. The precipitate was separated by centrifugation, washed thoroughly with deionized water and absolute ethanol, and dried in vacuum to obtain the SnS 2 Nanosheet anode materials. X-ray diffraction (XRD) analysis and transmission electron microscope (TEM) observation results show that the obtained product is SnS 2 Nanosheets (see Figure 4 )

[0029] 3) by the 3rd of embodiment 1) the method for step is assembled into test cell, and by the 3rd of embodiment 1) the test method test SnS of step 2 Electrochemical lithium storage performance of...

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Abstract

The invention discloses a preparation method of SnS2 nanoplate anode material of a lithium-ion battery, comprising the following steps: dissolving L-cysteine in deionized water, then adding stannic chloride and fully stirring the solution to dissolve the stannic chloride; transferring the mixed solution in a reaction kettle with a polytetrafluoroethylene tank to react hydrothermal reaction at 180-220 DEG C for 8-12h, then cooling to the room temperature, centrifugalizing the products to obtain precipitate, cleaning and drying the precipitate fully to obtain the SnS2 nanoplate anode material of a lithium-ion battery; wherein, the molar ratio of L-cysteine to stannic chloride is 4:1-8:1. The SnS2 nanoplate anode material of a lithium-ion battery prepared by the method of the invention has high electrochemical capacity and good cyclic stability.

Description

technical field [0001] The present invention relates to the preparation method of lithium ion battery electrode material, especially lithium ion battery SnS 2 The invention discloses a method for preparing a negative electrode material of nanosheets, which belongs to the technical field of inorganic material synthesis and new energy. Background technique [0002] Lithium-ion batteries have excellent properties such as high specific energy, no memory effect, and environmental friendliness, and have been widely used in portable mobile appliances such as mobile phones and notebook computers. As a power battery, lithium-ion batteries also have broad application prospects in electric bicycles and electric vehicles. At present, graphite materials (such as: graphite microspheres, natural modified graphite and artificial graphite, etc.) are mainly used as negative electrode materials for lithium-ion batteries. These graphite materials have good cycle stability, but their capacity i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/58
CPCY02E60/12Y02E60/10
Inventor 李辉陈卫祥常焜赵杰
Owner ZHEJIANG UNIV
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