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Carbon-coated titanium-doped stannic oxide material, manufacturing method and application thereof

A tin dioxide and titanium doping technology, applied in secondary batteries, electrochemical generators, active material electrodes, etc., can solve the problems of poor reversibility and poor cycle stability of tin dioxide conversion reaction, and achieve easy scale-up Effects of production, buffering volume expansion, enhancing intrinsic conductivity, and structural stability

Active Publication Date: 2020-02-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this technique, although a C-SnO 2 / Ti 3 C 2 Two-dimensional nano-lithium ion battery negative electrode material, however, the material is in 1Ag -1 The current density can only maintain less than 200mAh g -1 capacity, and poor cycle stability, and did not solve the main problem of the poor reversibility of the conversion reaction of tin dioxide

Method used

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  • Carbon-coated titanium-doped stannic oxide material, manufacturing method and application thereof
  • Carbon-coated titanium-doped stannic oxide material, manufacturing method and application thereof
  • Carbon-coated titanium-doped stannic oxide material, manufacturing method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0054] A method for preparing a carbon-coated titanium-doped tin dioxide material, comprising the following steps:

[0055] (1) The analytically pure 1.07g SnSO 4 Dissolve in 100mL deionized water, and magnetically stir at 200 rpm for 30 minutes, and stir evenly to obtain solution A;

[0056] (2) Under magnetic stirring, add 9mL dropwise to the solution A obtained in step (1), 5% H 2 SO 4 , and stirred at 250 rpm for 2 minutes, and stirred evenly to obtain solution B;

[0057] (3) under magnetic stirring, add 0.161g in step (2) gained solution B, the spherical NiTi alloy (the mass percent of Ni in the alloy composition is 55%) powder of 60nm, and stir 30 minutes with 250 revs / min, Stir evenly to obtain solution C;

[0058] (4) Under magnetic stirring, add 2 g of glucose to solution C obtained in step (3), stir at 250 rpm for 60 minutes, and stir evenly to obtain solution D;

[0059] (5) The solution D obtained in step (4) was transferred to a tetrafluoroethylene-lined aut...

Embodiment 2

[0075] A method for preparing a carbon-coated titanium-doped tin dioxide material, comprising the following steps:

[0076] (1) The analytically pure 1g SnSO 4 Dissolve in 100mL deionized water, and magnetically stir at 400 rpm for 30 minutes, and stir evenly to obtain solution A;

[0077] (2) Under magnetic stirring, add 12mL dropwise to the solution A obtained in step (1), H with a solubility of 8% 2 SO 4 , and stirred at 400 rpm for 3 minutes, and stirred evenly to obtain solution B;

[0078] (3) under magnetic stirring, add 0.3g in step (2) gained solution B, the spherical NiTi alloy (the mass percentage of Ni in the alloy composition is 56%) powder of 120nm, and stir 25 minutes with 420 revs / min, Stir evenly to obtain solution C;

[0079] (4) Under magnetic stirring, add 1.5 g of glucose to solution C obtained in step (3), and stir at 480 rpm for 50 minutes, and stir evenly to obtain solution D;

[0080] (5) The solution D obtained in step (4) was transferred to a te...

Embodiment 3

[0088] A method for preparing a carbon-coated titanium-doped tin dioxide material, comprising the following steps:

[0089] (1) The analytically pure 2g SnSO 4 Dissolve in 100mL deionized water, and stir magnetically at 300 rpm for 30 minutes, and stir evenly to obtain solution A;

[0090] (2) Under magnetic stirring, add 15mL dropwise to the solution A obtained in step (1), H with a solubility of 3% 2 SO 4 , and stirred at 300 rpm for 2 minutes, and stirred evenly to obtain solution B;

[0091] (3) under magnetic stirring, add 0.2g in step (2) gained solution B, the spherical NiTi alloy (the mass percentage of Ni in the alloy composition is 54%) powder of 80nm, and stir 30 minutes with 360 revs / min, Stir evenly to obtain solution C;

[0092] (4) Under magnetic stirring, add 5 g of glucose to solution C obtained in step (3), and stir at 390 rpm for 60 minutes, and stir evenly to obtain solution D;

[0093] (5) The solution D obtained in step (4) was transferred to a tetra...

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Abstract

The invention discloses a carbon-coated titanium-doped stannic oxide material, a manufacturing method and an application thereof. The manufacturing method comprises the following steps of firstly, uniformly mixing a SnSO4 aqueous solution with H2SO4; adding 60-120nm spherical or nearly spherical nickel-titanium alloy powder into the aqueous solution, continuously adding a glucose organic matter, uniformly mixing, transferring the solution into a tetrafluoroethylene lining high-pressure reaction kettle, and reacting at 150-200 DEG C for 18-30 hours; and after the reaction is finished, cooling to a room temperature, centrifugally collecting a reaction product, washing with water and ethanol for multiple times, carrying out vacuum drying on the product, and calcining in an argon-shielded tubefurnace to obtain the carbon-coated titanium-doped stannic oxide material. The manufacturing method provided in the invention is high in controllability and simple to operate, can be used for large-scale production of a lithium ion secondary battery electrode material, and can be used to significantly improve cycle and rate performance of an electrode material.

Description

technical field [0001] The invention belongs to the field of nanometer functional materials and lithium-ion secondary batteries, and in particular relates to a carbon-coated titanium-doped tin dioxide material and a preparation method and application thereof. Background technique [0002] Lithium ion batteries (Lithium ion batteries, LIBs) are mainly composed of four parts: positive electrode, negative electrode, separator and electrolyte. Lithium ions are repeatedly intercalated and extracted between the positive and negative electrodes to realize the mutual conversion of electrical energy and chemical energy. Energy storage technology. During the charging process, the lithium-ion battery performs work on the external power source, and the lithium ions are separated from the positive electrode material and extracted from its crystal lattice. Under the transport action of the electrolyte, it is transported through the separator to the vicinity of the negative electrode mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M10/0525
CPCH01M4/366H01M4/483H01M4/625H01M4/626H01M4/628H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 袁斌梁紫微闫钰胡仁宗杨黎春刘军朱敏
Owner SOUTH CHINA UNIV OF TECH
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