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A kind of preparation method of cubic structure sns2 sodium ion battery negative electrode material

A technology for sodium ion batteries and negative electrode materials, which is applied in battery electrodes, nanotechnology for materials and surface science, secondary batteries, etc. Excellent charge-discharge rate performance, uniform morphology, and fast rate effects

Active Publication Date: 2018-06-22
SHAANXI UNIV OF SCI & TECH
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  • Claims
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Problems solved by technology

Among them, the solid-phase reaction method has the advantages of no need for solvents, simple equipment, and easy control of reaction conditions, but because the reaction is carried out in the solid phase, the reaction is usually incomplete and the yield is low.
Mechanical exfoliation is commonly used to obtain highly crystalline ultrathin SnS 2 Nanosheets, but the yield of nanosheets obtained by this method is very small, and the controllability is very poor, so it can only be applied to basic scientific research

Method used

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  • A kind of preparation method of cubic structure sns2 sodium ion battery negative electrode material
  • A kind of preparation method of cubic structure sns2 sodium ion battery negative electrode material

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preparation example Construction

[0027] A cubic structure SnS 2 A preparation method for a negative electrode material for a sodium ion battery, comprising the following steps:

[0028] 1) Sodium thiosulfate (Na 2 S 2 o 2 ) was dissolved in deionized water and prepared into a solution A with a concentration of 0.2 to 1.0 mol / L, according to the molar ratio n Sn :n S =1.0: (2.0~4.2) tin chloride pentahydrate (SnCl 4 ·5H 2 O) be dissolved in an equal amount of deionized water (i.e. equal to the deionized water of dissolved sodium thiosulfate) to prepare solution B;

[0029] 2) Add solution B dropwise to solution A under magnetic stirring to obtain mixed solution C, then press n under magnetic stirring 五水氯化锡 :n 十六烷基三甲基氯化铵=1: The ratio of (0.00062~0.01187) gradually adds cetyltrimethylammonium chloride (CTAC) into the mixed solution C to form a uniformly mixed solution D;

[0030] 3) Put the mixed solution D into an ultrasonic generator and ultrasonically vibrate for 1-3 hours.

[0031] 4) Under the act...

Embodiment 1

[0036] 1) Sodium thiosulfate (Na 2 S 2 o 2 ) was dissolved in deionized water, and prepared into a solution A with a concentration of 0.2mol / L, according to the molar ratio n Sn :n S =1.0:2.0 tin chloride pentahydrate (SnCl 4 ·5H 2 O) be dissolved in equal amount of deionized water and be prepared into solution B;

[0037] 2) Add solution B dropwise to solution A under magnetic stirring to obtain mixed solution C, then press n under magnetic stirring 五水氯化锡 :n 十六烷基三甲基氯化铵 =1:0.00062 ratio cetyltrimethylammonium chloride (CTAC) was gradually added to the mixed solution C to form a uniformly mixed solution D;

[0038] 3) Put the mixed solution D into an ultrasonic generator for ultrasonic oscillation for 1 h.

[0039] 4) Under the action of magnetic stirring, add ammonia water dropwise to the mixed solution D to adjust the pH of the solution to 4 to form a solution E;

[0040] 5) Put the E solution into a hydrothermal reactor and seal it, and control the filling ratio at ...

Embodiment 2

[0043] 1) Sodium thiosulfate (Na 2 S 2 o 2 ) was dissolved in deionized water, and prepared into a solution A with a concentration of 0.7mol / L, according to the molar ratio n Sn :n S =1.0:3.0 tin chloride pentahydrate (SnCl 4 ·5H 2 O) be dissolved in equal amount of deionized water and be prepared into solution B;

[0044] 2) Add solution B dropwise to solution A under magnetic stirring to obtain mixed solution C, then press n under magnetic stirring 五水氯化锡 :n 十六烷基三甲基氯化铵 =1:0.0086 ratio cetyltrimethylammonium chloride (CTAC) was gradually added to the mixed solution C to form a uniformly mixed solution D;

[0045] 3) Put the mixed solution D into an ultrasonic generator for ultrasonic oscillation for 2 hours.

[0046] 4) Under the action of magnetic stirring, add ammonia water dropwise to the mixed solution D, and adjust the pH of the solution to 5 to form a solution E;

[0047] 5) Put the E solution into a hydrothermal reactor and seal it, and control the filling rati...

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Abstract

The invention discloses a preparation method of a SnS2 sodium-ion battery anode material with a cubic structure. The preparation method comprises steps as follows: 1), sodium thiosulfate is dissolved in deionized water, a solution A is prepared, stannic chloride pentahydrate is dissolved in the equal amount of deionized water, and a solution B is prepared; 2), the solution B is dropwise added to the solution A, a solution C is obtained, hexadecyl trimethyl ammonium chloride is gradually added to the solution C, and a solution D is obtained; 3), the solution D is subjected to ultrasonic oscillation in an ultrasonic generator; 4), pH of the mixed solution D after ultrasonic oscillation treatment is regulated, and a solution E is prepared; 5), the solution E is subjected to a hydrothermal reaction; 6), after the reaction, a precursor is taken out, centrifugally washed with ionized water and anhydrous ethanol and then subjected to freeze drying, and the SnS2 sodium-ion battery anode material with the cubic structure is obtained. The preparation method is low in preparation cost, simple to operate and short in preparation cycle, and the prepared SnS2 sodium-ion battery anode material with the cubic structure has excellent charge-discharge rate performance.

Description

technical field [0001] The invention relates to a preparation method of a negative electrode material of a sodium ion battery, in particular to a cubic structure SnS 2 A preparation method of a negative electrode material for a sodium ion battery. Background technique [0002] With the increasing pressure of resource scarcity, energy crisis and environmental pollution, looking for an efficient clean energy has become the focus of all countries, and the use and development of secondary rechargeable batteries is by far the most effective way to solve the energy and environmental crisis. Among them, the sodium ion battery is an electrochemical energy storage power source, which has the advantages of abundant raw material resources, low price, high specific energy, and good safety performance. Compared with lithium-ion batteries, sodium-ion batteries have various excellent properties and relatively stable electrochemical performance, making them expected to replace lithium-ion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G19/00H01M4/58H01M10/054B82Y30/00
CPCB82Y30/00C01G19/00C01P2004/03C01P2004/64C01P2006/40H01M4/5815H01M10/054Y02E60/10
Inventor 殷立雄程如亮房佳萌黄剑锋张峰孔新刚柴思敏刘长青
Owner SHAANXI UNIV OF SCI & TECH
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