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Preparation method of a carbon gel-loaded sulfur-lithium-sulfur battery cathode material

A lithium-sulfur battery and cathode material technology, which is applied in battery electrodes, circuits, electrical components, etc., can solve the problems of long reaction time, high production cost and high temperature, achieve uniform distribution of sulfur element, fast cooling speed, and improve energy density. Effect

Active Publication Date: 2019-11-22
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a method for preparing a carbon gel-loaded sulfur-lithium-sulfur battery positive electrode material, which solves the problems of long reaction time, high temperature, large energy consumption and high production cost in the preparation method of the prior art

Method used

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  • Preparation method of a carbon gel-loaded sulfur-lithium-sulfur battery cathode material
  • Preparation method of a carbon gel-loaded sulfur-lithium-sulfur battery cathode material
  • Preparation method of a carbon gel-loaded sulfur-lithium-sulfur battery cathode material

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Experimental program
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Effect test

Embodiment 1

[0046] (1) Pretreatment of the carbon gel material and the container conduit used: the carbon gel material, the container and conduit used were cleaned with deionized water, and then placed in a blast drying oven for 10 hours at 80°C to remove surface moisture;

[0047] (2) Put 5g of elemental sulfur into the bottom of the piston-sealed cylindrical cylinder, stack 5g of cylindrical carbon gel material on it, and pack into the piston;

[0048] (3) Push the piston to the bottom of the cylinder, completely discharge the air in the cylinder and the carbon gel material, connect the outlet of the cylinder to nitrogen, and pull the piston to fill it with nitrogen until the compression ratio is 2;

[0049] (4) Seal the outlet of the cylinder, and quickly push the piston at a speed of 0.2m / s. The nitrogen in the cylinder will heat up due to sudden compression, causing the sulfur element to be sublimated by heat and enter the pores of the carbon gel material under the pressure of the pist...

Embodiment 2

[0053] (1) Pretreatment of the carbon gel material and the container and conduit used: Clean the carbon gel material, the container and the conduit used with deionized water and put them in a blast drying oven for 24 hours at 100°C to remove surface moisture;

[0054] (2) Put 20g of elemental sulfur into the bottom of the piston-sealed cylindrical cylinder, stack 1g of cylindrical carbon gel material on it, and pack into the piston;

[0055] (3) Push the piston to the bottom of the cylinder, completely discharge the air in the cylinder and the carbon gel, connect the outlet of the cylinder to helium, and pull the piston to fill it with helium until the compression ratio is 10;

[0056] (4) Seal the outlet of the cylinder, and quickly push the piston at a speed of 1m / s. The helium in the cylinder will heat up due to sudden compression, causing the sulfur element to be sublimated by heat, and enter the pores of the carbon gel material under the pressure of the piston. middle; ...

Embodiment 3

[0061] (1) Pretreatment of the carbon gel material and the container conduit used: the carbon gel material, the container and conduit used were cleaned with deionized water, and then placed in a blast drying oven for 18 hours at 90°C to remove surface moisture;

[0062] (2) Put 10g of elemental sulfur into the bottom of the piston-sealed cylindrical cylinder, stack 2g of cylindrical carbon gel material on it, and pack into the piston;

[0063] (3) Push the piston to the bottom of the cylinder, completely discharge the air in the cylinder and the carbon gel, connect the outlet of the cylinder to argon, and pull the piston to fill it with argon until the compression ratio is 5;

[0064] (4) Seal the outlet of the cylinder, and quickly push the piston at a speed of 1m / s. The argon in the cylinder will heat up due to sudden compression, causing the sulfur element to be sublimated by heat and enter the pores of the carbon gel material under the pressure of the piston. middle;

[...

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Abstract

The invention discloses a preparation method of a carbon gel-loaded sulfur positive electrode material for a lithium-sulfur battery. The method comprises the steps of putting sulfur into a piston to seal the bottom of an air cylinder, stacking a carbon gel material at the upper part and enclosing the carbon gel material into the piston; exhausting air in the air cylinder and the carbon gel material and introducing an inert gas through an outlet of the air cylinder; sealing the outlet of the air cylinder, quickly pushing the piston, heating the inert gas in the air cylinder for heated sublimation of the sulfur due to sudden compression and entering channels of an aerogel material under the pressure of the piston; quickly drawing the piston to the initial length of the aerogel material, cooling the inert gas due to volume expansion, condensing a gas-phase easy-to-sublimate material along with drop in the temperature to form nanoscale particles and uniformly dispersing the nanoscale particles into the channels of the aerogel material; and obtaining the carbon gel material with high sulfur loads and then carrying out slicing and performing to obtain the positive electrode material. The preparation method is simple; and the obtained positive electrode material is high in sulfur loads and uniform in elemental sulfur distribution, and has excellent electrochemical properties.

Description

technical field [0001] The invention belongs to the technical field of positive electrode material preparation, and in particular relates to a preparation method of carbon gel loaded sulfur-lithium sulfur battery positive electrode material. Background technique [0002] With the continuous growth of energy consumption and demand, the oil resources that can be developed and utilized are increasingly depleted, and the conflict between energy consumption and ensuing environmental pollution has become a global issue. Therefore, the development and utilization of clean energy solar and wind energy It is imminent, and the utilization of these energy sources requires safe, low-cost, high energy density and long-life electrochemical energy storage devices to achieve. As a recyclable high-efficiency new energy storage device, secondary batteries represented by lead-acid batteries, hydrogen-suppressed batteries and lithium-ion batteries have become an important technical approach to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/587
CPCH01M4/5815H01M4/587Y02E60/10
Inventor 燕映霖秦海超王岩杨蓉许云华任冰陈利萍李巧乐史忙忙魏一奇
Owner XIAN UNIV OF TECH
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