Method for preparing graphene-loaded antimony nanotube negative electrode material for sodium ion battery and application of graphene-loaded antimony nanotube negative electrode material

Abstract

The invention relates to a method for preparing a graphene-loaded antimony nanotube negative electrode material for a sodium ion battery and application of the graphene-loaded antimony nanotube negative electrode material. The preparation method comprises the steps of dissolving sodium sulfide with a certain mole ratio in ethylene glycol to obtain a solution A; dissolving antinomy chloride with acertain mole ratio in the ethylene glycol to obtain a solution B, dropwise adding the solution A into the solution B, and performing stirring to obtain a solution C; adding a graphene dispersion liquid with certain concentration into the solution C, transferring the mixed liquid to a high-pressure kettle with a polytetrafluoroethylene lining, and maintaining for a certain time under a certain temperature to obtain a synthesis product D; centrifugally separating the solvent thermal synthesis product D at 10,000rpm, washing the synthesis product D with deionized water and alcohol, and obtaininga product E after drying for 12 hours at 85 DEG C; and obtaining the graphene-loaded antimony nanotube composite material after the product E is annealed for a certain time in a mixed atmosphere of H2and Ar under a special temperature. The graphene-loaded antimony nanotube negative electrode material has the advantages of high cycle specific capacity, high coulombic efficiency and stable cycle property.

Description

technical field

[0001] The invention relates to the technical field of battery materials, in particular to a method for preparing a graphene-supported antimony nanotube negative electrode material for a sodium ion battery and an application thereof. Background technique

[0002] With the rapid development of the battery industry, the disadvantages of lithium-ion batteries are becoming more and more obvious. Lithium resource reserves are limited and can no longer meet people's growing energy needs. However, sodium-ion batteries will gradually become the mainstream due to their low cost, abundant reserves and wide distribution. Ideal replacement for lithium-ion batteries.

[0003] Battery technology is the threshold for the vigorous promotion and development of electric vehicles, and the current battery industry is at a time when both lead-acid batteries and traditional lithium batteries are facing bottlenecks. bring about new changes.

[0004] Graphene is a planar film comp...

Examples

Embodiment 1

[0034] (1). Add 3mmol Na 2 S·9H 2 O is dissolved in 20ml ethylene glycol to obtain solution A;

[0035] (2). Add 1mmol SbCl 3 Dissolve in 20ml ethylene glycol to obtain solution B;

[0036] (3). Add solution B dropwise to solution A and stir to obtain solution C;

[0037] (4). 2ml concentration of 1mg / ml graphene dispersion was added to solution C and transferred to a polytetrafluoroethylene-lined autoclave, and synthesized product D was obtained after maintaining at 120°C for 3h;

[0038] (5). The product D was synthesized by solvothermal reaction at 120°C for 10 hours, centrifuged at 10,000 rpm, washed with deionized water and ethanol, and dried at 85°C for 12 hours to obtain product E;

[0039] (6). Product E in H 2 Annealed at 350 °C for 12 h in a mixed atmosphere with Ar to obtain graphene-supported antimony nanotube composites. (Such as figure 1 shown)

[0040] Gained graphene-supported antimony nanotube composite material is used as a sodium-ion battery negative...

Embodiment 2

[0043] (1) Add 3mmol Na 2 S·9H 2 O is dissolved in 20ml ethylene glycol to obtain solution A;

[0044] (2) 2mmolSbCl 3 Dissolve in 20ml ethylene glycol to obtain solution B;

[0045] (3) Add solution B dropwise to solution A and stir to obtain solution C;

[0046] (4) 2ml concentration of 1mg / ml graphene dispersion was added to solution C and transferred to a polytetrafluoroethylene-lined autoclave, kept at 120°C for 3h to obtain synthetic product D;

[0047] (5) The synthesized product D was synthesized by solvothermal reaction at 120°C for 10 hours, centrifuged at 10,000 rpm, washed with deionized water and ethanol, and dried at 85°C for 12 hours to obtain product E;

[0048] (6) The product E is in H 2 Or annealing at 350° C. for 12 h in an Ar atmosphere to obtain a graphene-supported antimony nanotube anode material.

[0049] Gained graphene loaded antimony nanotube negative electrode material electrochemical test method is as follows:

[0050] A button cell is used...

Embodiment 3

[0052] (1) Add 3mmol Na 2 S·9H 2 O is dissolved in 20ml ethylene glycol to obtain solution A;

[0053] (2) 3mmolSbCl 3 Dissolve in 20ml ethylene glycol to obtain solution B;

[0054] (3) Add solution B dropwise to solution A and stir to obtain solution C;

[0055] (4) 2ml concentration of 1mg / ml graphene dispersion was added to solution C and transferred to a polytetrafluoroethylene-lined autoclave, kept at 120°C for 3h to obtain synthetic product D;

[0056](5) The synthesized product D was synthesized by solvothermal reaction at 200°C for 10 hours, centrifuged at 10,000 rpm, washed with deionized water and ethanol, and dried at 85°C for 12 hours to obtain product E;

[0057] (6) The product E is in H 2 Or annealing at 350° C. for 12 h in an Ar atmosphere to obtain a graphene-supported antimony nanotube anode material.

[0058] Gained graphene loaded antimony nanotube negative electrode material electrochemical test method is as follows:

[0059] A button cell is used ...

technical field

[0001] The invention relates to the technical field of battery materials, in particular to a method for preparing a graphene-supported antimony nanotube negative electrode material for a sodium ion battery and an application thereof. Background technique

[0002] With the rapid development of the battery industry, the disadvantages of lithium-ion batteries are becoming more and more obvious. Lithium resource reserves are limited and can no longer meet people's growing energy needs. However, sodium-ion batteries will gradually become the mainstream due to their low cost, abundant reserves and wide distribution. Ideal replacement for lithium-ion batteries.

[0003] Battery technology is the threshold for the vigorous promotion and development of electric vehicles, and the current battery industry is at a time when both lead-acid batteries and traditional lithium batteries are facing bottlenecks. bring about new changes.

[0004] Graphene is a planar film comp...

Examples

Embodiment 1

[0034] (1). Add 3mmol Na 2 S·9H 2 O is dissolved in 20ml ethylene glycol to obtain solution A;

[0035] (2). Add 1mmol SbCl 3 Dissolve in 20ml ethylene glycol to obtain solution B;

[0036] (3). Add solution B dropwise to solution A and stir to obtain solution C;

[0037] (4). 2ml concentration of 1mg / ml graphene dispersion was added to solution C and transferred to a polytetrafluoroethylene-lined autoclave, and synthesized product D was obtained after maintaining at 120°C for 3h;

[0038] (5). The product D was synthesized by solvothermal reaction at 120°C for 10 hours, centrifuged at 10,000 rpm, washed with deionized water and ethanol, and dried at 85°C for 12 hours to obtain product E;

[0039] (6). Product E in H 2 Annealed at 350 °C for 12 h in a mixed atmosphere with Ar to obtain graphene-supported antimony nanotube composites. (Such as figure 1 shown)

[0040] Gained graphene-supported antimony nanotube composite material is used as a sodium-ion battery negative...

Embodiment 2

[0043] (1) Add 3mmol Na 2 S·9H 2 O is dissolved in 20ml ethylene glycol to obtain solution A;

[0044] (2) 2mmolSbCl 3 Dissolve in 20ml ethylene glycol to obtain solution B;

[0045] (3) Add solution B dropwise to solution A and stir to obtain solution C;

[0046] (4) 2ml concentration of 1mg / ml graphene dispersion was added to solution C and transferred to a polytetrafluoroethylene-lined autoclave, kept at 120°C for 3h to obtain synthetic product D;

[0047] (5) The synthesized product D was synthesized by solvothermal reaction at 120°C for 10 hours, centrifuged at 10,000 rpm, washed with deionized water and ethanol, and dried at 85°C for 12 hours to obtain product E;

[0048] (6) The product E is in H 2 Or annealing at 350° C. for 12 h in an Ar atmosphere to obtain a graphene-supported antimony nanotube anode material.

[0049] Gained graphene loaded antimony nanotube negative electrode material electrochemical test method is as follows:

[0050] A button cell is used...

Embodiment 3

[0052] (1) Add 3mmol Na 2 S·9H 2 O is dissolved in 20ml ethylene glycol to obtain solution A;

[0053] (2) 3mmolSbCl 3 Dissolve in 20ml ethylene glycol to obtain solution B;

[0054] (3) Add solution B dropwise to solution A and stir to obtain solution C;

[0055] (4) 2ml concentration of 1mg / ml graphene dispersion was added to solution C and transferred to a polytetrafluoroethylene-lined autoclave, kept at 120°C for 3h to obtain synthetic product D;

[0056](5) The synthesized product D was synthesized by solvothermal reaction at 200°C for 10 hours, centrifuged at 10,000 rpm, washed with deionized water and ethanol, and dried at 85°C for 12 hours to obtain product E;

[0057] (6) The product E is in H 2 Or annealing at 350° C. for 12 h in an Ar atmosphere to obtain a graphene-supported antimony nanotube anode material.

[0058] Gained graphene loaded antimony nanotube negative electrode material electrochemical test method is as follows:

[0059] A button cell is used ...

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