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a te x s y Co-doped micro-nano structure material, preparation method, battery electrode material sheet and lithium-sulfur battery

A micro-nano structure and battery electrode technology, applied in battery electrodes, structural parts, lithium batteries, etc., can solve the problems of further improvement of electrochemical performance, strict synthesis conditions, and difficulty in large-scale production, achieving huge application potential and industrial Value, excellent performance, effect of good electrochemical performance

Active Publication Date: 2022-04-05
WENZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the synthesis process of this type of material is mostly complicated, the synthesis conditions are relatively strict, and it is difficult to produce on a large scale. In addition, its electrochemical performance needs to be further improved.

Method used

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  • a te <sub>x</sub> s <sub>y</sub> Co-doped micro-nano structure material, preparation method, battery electrode material sheet and lithium-sulfur battery
  • a te <sub>x</sub> s <sub>y</sub> Co-doped micro-nano structure material, preparation method, battery electrode material sheet and lithium-sulfur battery
  • a te <sub>x</sub> s <sub>y</sub> Co-doped micro-nano structure material, preparation method, battery electrode material sheet and lithium-sulfur battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] S1: Weigh a certain amount of sodium hydroxide and sodium sulfide materials into a beaker, add an appropriate amount of deionized water to fully stir and dissolve, transfer the dissolved aqueous solution to a volumetric flask, and obtain a certain concentration of sulfur-containing hydrogen after constant volume Sodium oxide solution, stand for use, wherein the mass ratio of sodium sulfide material to sodium hydroxide is 12:1, and the concentration of sodium sulfide is 2.0mol L -1 ;

[0070] S2: Weigh a certain amount of tellurium, grind it into fine particles in an agate mortar, then use weighing paper to move the fine particles to the quartz tube, set the quartz tube to the vacuum packaging device, and slowly vacuum for 30 minutes to avoid the powder Splash inside the quartz tube. The quartz tube was burnt at high temperature with a hydrogen flame spray gun to make the caliber bonded, and the sample was vacuum-packed. After vacuum packaging, anneal at high temperatu...

Embodiment 2-3

[0072] Embodiment 2-3: the investigation of material consumption ratio in the step S1

[0073] Embodiment 2-3: except that in step S1, the mass ratio of sodium sulfide and sodium hydroxide is replaced by 6:1 and 18:1, other operations are all the same, thereby repeat operation embodiment 1, thus carried out successively In Example 2-3, the obtained tellurium-sulfur co-doped materials were named M2 and M3 in sequence.

[0074] The sulfur and the amount ratio of tellurium of the product that table 1 different material dosage ratios obtain

[0075]

Embodiment 4-5

[0076] Embodiment 4-5: the investigation of annealing temperature in the step S2

[0077] Except that the high-temperature annealing temperature in step S2 was replaced by 450°C to 400°C and 500°C respectively, other operations were unchanged, so that Example 1 was repeated to obtain Examples 4-5 in sequence, and the obtained tellurium-sulfur co-doped The heterogeneous materials are therefore named M4, M5.

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Abstract

The invention belongs to the field of lithium-sulfur battery electrode materials, in particular to a Te x S y Co-doped micro-nano structure material, preparation method, battery electrode material sheet and lithium-sulfur battery. The Te x S y The co-doped micro-nano structure material is prepared by the cyclic voltammetry of the three-electrode system. It has excellent performance and can be used to prepare battery electrode material sheets for lithium-sulfur batteries, which can be used in lithium-sulfur batteries and have shown good performance. It has great application potential and industrial value in the field of lithium batteries.

Description

technical field [0001] The invention belongs to the field of lithium-sulfur battery electrode materials, in particular to a Te x S y Co-doped micro-nano structure material, preparation method, battery electrode material sheet and lithium-sulfur battery. Background technique [0002] With the increasing global demand for energy and increasing concern about climate and environmental issues, lithium batteries have become an indispensable energy storage system in future life and production. However, the current commercialized ternary lithium (Mn, Co, Ni) batteries are difficult to meet the increasing energy demand due to their inherent capacity, so S-group elements have attracted widespread attention because of their high capacity, high energy density and abundant reserves, and have become One of the best candidate materials for next-generation lithium batteries. However, S group elements also have major disadvantages, such as: volume expansion, poor electrical conductivity, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/38H01M10/052C25D9/04B82Y40/00B82Y30/00
CPCH01M4/5815H01M4/38H01M10/052C25D9/04B82Y30/00B82Y40/00Y02E60/10
Inventor 王舜李俊叶春暖金辉乐卢国龙陈光王继昌
Owner WENZHOU UNIV
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