Antimony sulfide negative electrode material with micro-nano structure for sodium-ion battery and preparation method of antimony sulfide negative electrode material

A sodium-ion battery and negative electrode material technology, applied in the field of electrochemistry, can solve the problems of low capacity and poor cycle performance of sodium-ion battery negative electrode materials

Inactive Publication Date: 2015-05-06
GUILIN UNIV OF ELECTRONIC TECH
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of low capacity and poor cycle performance of the negative electrode material of the sodium ion battery, the technical problem to be solved by the present invention is to provide a kind of antimony sulfide with micro-nano structure as the negative electrode material of the sodium ion battery to realize its high capacity and excellent cycle performance

Method used

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  • Antimony sulfide negative electrode material with micro-nano structure for sodium-ion battery and preparation method of antimony sulfide negative electrode material
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  • Antimony sulfide negative electrode material with micro-nano structure for sodium-ion battery and preparation method of antimony sulfide negative electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Example 1: Preparation of antimony sulfide nanowires by hydrothermal method and its electrochemical sodium storage performance

[0029] Add a certain amount of antimony trichloride to 60 mL of deionized water, and stir for several minutes to form a white turbid solution, add 60 mL of ethylene glycol, continue magnetic stirring for several minutes, then add a certain amount of sodium borohydride and sulfur powder respectively , and then transfer the mixed solution to a polytetrafluoroethylene-lined hydrothermal reactor, seal the reactor, and keep the temperature at 120-240°C for several hours. After the reactor was cooled to room temperature, the product was centrifuged, washed, and vacuum-dried to obtain antimony sulfide nanowires (attached figure 2 ). The negative electrode made of antimony sulfide nanowires has an initial discharge capacity of 850 mAh / g at a current density of 100 mA / g, and after 40 cycles, the capacity still maintains 90% of the capacity of the sec...

Embodiment 2

[0030] Embodiment 2: Synthesis of antimony sulfide microtubes by hydrothermal method

[0031] Dissolve antimony potassium tartrate in deionized water, stir well, then add thiourea, wait for it to mix evenly, then transfer the mixed solution to a polytetrafluoroethylene-lined hydrothermal reaction kettle, seal it, and place it at 160-240 °C Keep warm for several hours. After the reactor was cooled to room temperature, the product was centrifuged, washed, and vacuum-dried to obtain antimony sulfide microtubes (see attached image 3 ).

Embodiment 3

[0032] Example 3: Precipitation method to prepare spherical micro-nano structure antimony sulfide particles

[0033] Dissolve antimony chloride in ether and stir magnetically. After fully stirring, a uniform solution is formed. Then add sodium sulfide to the solution and let it stand for several hours. The precipitate is formed and precipitated. After the precipitate is centrifuged, cleaned and dried in vacuum, Obtain spherical micro-sodium grade antimony sulfide particles (see attached Figure 4 ).

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Abstract

The invention discloses an antimony sulfide negative electrode material with a micro-nano structure for a sodium-ion battery and a preparation method of the antimony sulfide negative electrode material. Materials with the structure such as a micro-tube, a nano-wire and spherical micro-nano level particles are prepared by a hydrothermal process and a precipitation method; the morphologies of the materials are regular and uniform; the first capacity exceeds 850mAh / g when the current density is 100mA / g; and the capacity is still 90% that of the second week after circulating for 40 weeks. Antimony sulfide powder with the micro-nano structure is synthesized by the hydrothermal process and the precipitation method; and according to the antimony sulfide negative electrode, the preparation method is simple, raw materials are available and the cost is low; the process is easy to control; and the prepared antimony sulfide with the micro-nano structure has excellent electrochemical sodium storage performance, and is a good sodium ion battery negative electrode material.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a micro-nano structure antimony sulfide negative electrode material for a sodium ion battery and a preparation method thereof. Background technique [0002] With the rapid development of social economy, fossil energy resources are becoming increasingly exhausted. Changing the existing irrational energy structure and vigorously developing renewable and clean energy have become the primary issues facing the sustainable development of human society. Lithium-ion batteries have the advantages of high energy density, long cycle life, high operating voltage, no memory effect, small self-discharge, and wide operating temperature range. They are considered to be the most promising green power sources and have been widely used in various electronic applications. The working power of the product and the power battery of the mobile equipment. However, lithium-ion batteries still have severa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58
CPCH01M4/5815H01M10/05Y02E60/10
Inventor 邓健秋潘进姚青荣王仲民周怀营
Owner GUILIN UNIV OF ELECTRONIC TECH
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