Titanium carbide-loaded stannous sulfide composite anode material

A stannous sulfide and negative electrode material technology, applied in battery electrodes, electrochemical generators, electrical components, etc., can solve the problems of poor cycle performance, poor cycle stability, poor rate performance, etc., and achieve the improvement of cycle performance and rate performance , good structural stability, good cycle performance and rate performance

Inactive Publication Date: 2018-12-07
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem with the prior art is that the volume expansion of the stannous sulfide material results in poor cycle stability and poor rate performance
Aiming at the disadvantages of poor cycle performance and poor rate performance caused by the huge volume change of tin-based anode material SnS during c

Method used

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  • Titanium carbide-loaded stannous sulfide composite anode material
  • Titanium carbide-loaded stannous sulfide composite anode material
  • Titanium carbide-loaded stannous sulfide composite anode material

Examples

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Example Embodiment

[0032] Example 1

[0033] A titanium carbide supported stannous sulfide composite anode material, namely Ti 3 C 2 The SnS composite anode material is loaded with stannous sulfide. In this example, the composite anode material SnS / Ti 3 C 2 , The mass ratio of pure phase stannous sulfide anode material to titanium carbide is 1:0.03.

[0034] Prepared by the following method:

[0035] Weigh 0.528g of L-cysteine ​​and 0.364g of potassium stannate and mix them in a beaker, add deionized water and magnetically stir until completely dissolved (solution A), at the same time, weigh 0.045g of titanium carbide and place it in another beaker Add 1ml of phthalate diethylene glycol diacrylate (PDDA) and deionized water to ultrasonically shake until completely dissolved (solution B), slowly add solution B to solution A to form a black suspension C, change the black Suspension C was poured into a high-temperature reaction kettle in a polytetrafluoroethylene inner village, and then the reaction kett...

Example Embodiment

[0036] Example 2

[0037] A titanium carbide supported stannous sulfide composite anode material, namely Ti 3 C 2 The SnS composite anode material is loaded with stannous sulfide. In this example, the composite anode material SnS / Ti 3 C 2 , The mass ratio of pure phase stannous sulfide anode material to titanium carbide is 1:0.06.

[0038] Specifically prepared by the following steps:

[0039] Weigh 0.528g of L-cysteine ​​and 0.364g of potassium stannate and mix them in a beaker, add deionized water and magnetically stir until completely dissolved (solution A), at the same time, weigh out 0.09g of titanium carbide and place it in another beaker Add 1ml of phthalate diethylene glycol diacrylate (PDDA) and deionized water to ultrasonically shake until completely dissolved (solution B), slowly add solution B to solution A to form a black suspension C, change the black Suspension C was poured into a high-temperature reaction kettle in a polytetrafluoroethylene inner village, and then th...

Example Embodiment

[0040] Example 3

[0041] A titanium carbide supported stannous sulfide composite anode material, namely Ti 3 C 2 The SnS composite anode material is loaded with stannous sulfide. In this example, the composite anode material SnS / Ti 3 C 2 , The mass ratio of pure phase stannous sulfide anode material to titanium carbide is 1:0.09.

[0042] Specifically prepared by the following steps:

[0043] Weigh 0.528g of L-cysteine ​​and 0.364g of potassium stannate and mix them in a beaker, add deionized water and magnetically stir until completely dissolved (solution A), at the same time, weigh 0.135g of titanium carbide and place it in another beaker Add 1ml of phthalate diethylene glycol diacrylate (PDDA) and deionized water to ultrasonically shake until completely dissolved (solution B), slowly add solution B to solution A to form a black suspension C, change the black Suspension C was poured into a high-temperature reaction kettle in a polytetrafluoroethylene inner village, and then the r...

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Abstract

The invention relates to a titanium carbide-loaded stannous sulfide composite anode material. The composite anode material is a stannous sulfide anode material loaded with titanium carbide, wherein the loading capacity of titanium carbide is 3-9% of the mass of stannous sulfide. The composite anode material is prepared by the following specific method: mixing a sulfur source and a tin source, adding a solvent and stirring until the above substances are completely dissolved so as to obtain a sulfur-tin mixed solution; taking titanium carbide, adding a surfactant and deionized water, and carrying out ultrasonic oscillation until the substances are completely dissolved so as to obtain a titanium carbide dispersion; adding the titanium carbide dispersion into the sulfur-tin mixed solution, andtransferring the mixed solution into a reaction kettle to carry out a hydrothermal reaction; successively centrifuging, washing and drying the product after the reaction, and finally grinding to obtain a powder product; calcining the powder product in an inert gas atmosphere, cooling to room temperature with a furnace, and grinding the powder to obtain a product. This material shows better cycleperformance and rate performance than pure-phase stannous sulfide.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and in particular relates to a composite negative electrode material loaded with titanium carbide and tin sulfide. Background technique [0002] As we all know, the electrochemical performance of lithium-ion batteries is mainly determined by its electrode materials, and the positive electrode materials of lithium-ion batteries have been relatively mature, so negative electrode materials have become a hot research topic at present. To become the negative electrode material of lithium-ion batteries, there must be some basic requirements for the performance of the material: first, the potential of the alloying process of lithium should be low, as close as possible to the potential of metal lithium, so that the output voltage of the battery is high, and the charge and discharge The voltage is stable during the process. Secondly, the specific capacity is high and the volume expansion is small dur...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/362H01M4/5815H01M4/62H01M4/628H01M10/0525Y02E60/10
Inventor 赖春艳艾进进杨帅雷轶轲
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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