Reduced graphene oxide modified antimony trisulfide battery anode material

A technology of antimony trisulfide and battery negative electrode, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of low stability of negative electrode materials, achieve high specific capacity, enhance conductivity and stability, and improve volume expansion effect and effect of agglomeration effect

Active Publication Date: 2018-10-23
SHANGHAI UNIV OF ENG SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] Chinese patent 201610910361.9 discloses a negative electrode material for lithium-ion batteries and a preparation method thereof. The negative electrode material has a core-shell structure including a core layer and a shell layer; the core layer is antimony trioxide, and the shell layer is three Antimony sulfide, the mass ratio of the core layer and the shell layer is (0.4-5): 1, the above-mentioned material has higher charge and discharge efficiency and specific capacity, etc. compared with general negative electrode materials, but its negative electrode The stability of the material is relatively low

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  • Reduced graphene oxide modified antimony trisulfide battery anode material
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  • Reduced graphene oxide modified antimony trisulfide battery anode material

Examples

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Embodiment 1-1

[0033] A kind of reduced graphene oxide modified Sb 2 S 3 A method for preparing a negative electrode material for a sodium ion battery, comprising the following steps:

[0034] Step 1. First, dissolve 1 mmol of antimony trichloride, 2 mmol of L-cysteine, and 2 mmol of sodium sulfide nonahydrate in 30 ml of deionized water, stir for 2 hours, and heat the reaction at 160 degrees Celsius 12 hours. Then wash with deionized and absolute ethanol, and finally dry at 60 degrees Celsius for 12 hours to obtain Sb 2 S 3 powder.

[0035] Take 1 mmol of Sb prepared above 2 S 3 The powder was added to 20 milliliters of absolute ethanol, and then 10 milliliters of graphene oxide solution (5 milligrams of graphene oxide was dissolved in 10 milliliters of deionized water, prepared by ultrasonic cleaning for 1 hour at a power of 200 watts), magnetic Stir for 1 hour to obtain a precursor solution;

[0036]Step 2. Then transfer the above precursor solution to a polytetrafluoroethylene-li...

Embodiment 1-2

[0039] A preparation method for a negative electrode sheet of a sodium ion battery, specifically, the reduced graphene oxide modified Sb prepared in the above-mentioned embodiment 1-1 of 0.08 grams 2 S 3 The negative electrode material of the battery is evenly mixed with 0.01 gram of binder sodium carboxymethyl cellulose and 0.01 gram of conductive agent Super-P, and water is used as a solvent to make a slurry, which is coated on copper foil (the thickness of the coating is 150 microns), and vacuum dried at 110 degrees centigrade for 12 hours, and rolled (the thickness of the rolled is 130 microns), to prepare a negative electrode sheet for a sodium ion battery.

[0040] The sodium ion battery negative plate, metal sodium sheet, and electrolyte prepared in this example were assembled into a sodium ion battery for constant current charge and discharge tests. The electrolyte used contained 1.0M NaClO 4 EC / DEC / FEC (1:1:2Vol%).

Embodiment 2-1

[0042] A kind of reduced graphene oxide modified Sb 2 S 3 A method for preparing a negative electrode material for a sodium ion battery, comprising the following steps:

[0043] Step 1. First, dissolve 1 mmol of antimony trichloride, 2 mmol of L-cysteine, and 2 mmol of sodium sulfide nonahydrate in 30 ml of deionized water, stir for 2 hours, and heat the reaction at 180 degrees Celsius 12 hours. Then washed with deionized and absolute ethanol, and finally dried at 60 °C for 12 hours to obtain Sb 2 S 3 powder.

[0044] The above prepared 0.5 mmol Sb 2 S 3 The powder was added to 20 milliliters of absolute ethanol, and then 10 milliliters of graphene oxide solution was added (10 milligrams of graphene oxide was dissolved in 10 milliliters of deionized water, and the power was 200 watts, and ultrasonic cleaning was performed for 2 hours), magnetically stirred for 1 Hour, obtain precursor solution;

[0045] Step 2. Next, the precursor solution was transferred to a polytetr...

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Abstract

The invention relates to a reduced graphene oxide modified antimony trisulfide battery anode material. The battery anode material is prepared by following steps: (1) adding Sb2S3 powder into anhydrousethanol, then dispersing the solution into a graphene oxide solution, and stirring the mixed solution until the mixed solution becomes uniform and stable to obtain a precursor solution; (2) transferring the precursor solution obtained in the step (1) to a hydrothermal reactor, heating the hydrothermal reactor to carry out reactions, and cooling the reactor to the room temperature to obtain suspension; and (3) filtering the suspension obtained in the step (2), washing, and drying to obtain the target product. Compared with the prior art, an Sb2S3 nano rod is prepared by a hydrothermal method,the preparation method is simple, the process is easy to control, the raw materials are easily available, and the cost is low. The prepared reduced graphene oxide modified Sb2S3 nano composite structure has an excellent electrochemical sodium storage performance and is a good sodium ion battery anode material.

Description

technical field [0001] The invention belongs to the technical field of battery materials, and relates to a reduced graphene oxide modified antimony trisulfide battery negative electrode material. Background technique [0002] As an alternative to lithium-ion batteries, sodium-ion batteries have attracted increasing attention due to the advantages of abundant sodium resources, low cost, high efficiency, and stable chemical properties. Compared with Li-ion batteries, the main challenge for Na-ion batteries is to find a suitable anode material that can effectively support larger diameter Na-ion batteries. At present, some countries with relatively advanced battery technology in the world have listed sodium-ion battery technology as an important basic and forward-looking research field, and as the development direction of energy storage battery technology that will be focused on in the future. Actively exploring a new type of anode material system for sodium-ion batteries with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/054H01M4/136H01M4/1397
CPCH01M4/136H01M4/1397H01M4/364H01M4/5815H01M4/628H01M10/054Y02E60/10
Inventor 温思颖赵家昌徐婷婷徐菁利
Owner SHANGHAI UNIV OF ENG SCI
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