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Preparation method and application of mycelium-based carbon film conductive skeleton and method for preparing battery

A mycelium-based carbon film, mycelium technology, applied in non-aqueous electrolyte batteries, battery electrodes, lithium batteries, etc., can solve the limitations of lithium-sulfur battery energy storage capacity, cycle life and charging speed, weak electrochemical kinetic performance , it is difficult to achieve commercial application and other problems, to achieve the effect of improving electrochemical kinetic performance, conducive to uniform loading, and high industrial application prospects

Active Publication Date: 2022-03-15
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of the traditional high-sulfur-loaded electrode is obtained by adjusting the coating thickness. The pole piece is easy to fall off during the drying process, resulting in damage to the electrode structure. The capacity decays rapidly, and is limited by the weak electrochemical kinetic performance, and the rate performance is poor
The above comprehensive reasons severely limit the energy storage capacity, cycle life and charging speed of lithium-sulfur batteries, so it is difficult to realize commercial applications

Method used

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  • Preparation method and application of mycelium-based carbon film conductive skeleton and method for preparing battery
  • Preparation method and application of mycelium-based carbon film conductive skeleton and method for preparing battery
  • Preparation method and application of mycelium-based carbon film conductive skeleton and method for preparing battery

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Embodiment 1

[0040] (1) select the fungal bacterial classification with filamentous form, obtain the mycelia fiber based on microbial culture technology, be specifically: configure PDA culture medium in proportion, sub-pack in multiple test tubes, expand and cultivate the purchased Rhizopus stolonifer, and then transfer Connected in PDB culture medium, under the condition of 25 ℃, keep the constant temperature for a period of time, collect the mycelia fibers, then rinse with deionized water repeatedly, and then immerse in 0.1-1mol / L NaOH solution at 70-80 ℃ Put it into a water bath for 2 hours, and then rinse it with deionized water until the pH value is about 7.0 to obtain a mycelium precursor.

[0041] (2) The mycelium precursor was treated in a crusher for 3 minutes, then dispersed by magnetic stirring for 36 hours, and then ultrasonically crushed for 30 minutes to obtain a clear and transparent mycelium fiber dispersion.

[0042] (3) Vacuum filter 100 mL of mycelial fiber dispersion on...

Embodiment 2

[0047] The difference from Example 1 is that the suction filtration volume of the mycelia fiber dispersion is 200 mL, and the others are the same as in Example 1.

Embodiment 3

[0049] The difference from Example 1 is that the suction filtration volume of the mycelia fiber dispersion is 300 mL, and the others are the same as in Example 1.

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Abstract

The invention discloses a preparation method and application of a hypha-based carbon film conductive skeleton and a method for preparing a battery, biomass hypha is used as a raw material, and a hypha fiber film is prepared by mechanical crushing, stirring, dispersion by an ultrasonic-assisted method, suction filtration and film formation and then by a freeze drying method. The preparation method comprises the following steps: clamping a freeze-dried mycelium membrane between two graphite plates, placing the graphite plates in a tubular furnace, taking nitrogen as protective gas, carrying out stepped heating to obtain a mycelium-based carbon membrane conductive skeleton, and further adsorbing a high-concentration lithium octasulfide solution through rotary dispensing to obtain the self-supporting positive electrode material of the lithium-sulfur battery. According to the invention, the hypha fibers are interwoven with one another, so that the self-supporting positive plate has excellent adsorption capacity and relatively good supporting property, the loading density and uniformity of active substances in the self-supporting positive plate are effectively improved, and the tested battery has relatively good cycle life and rate capability. The self-supporting positive plate prepared by the invention adopts a laminated assembled large-size battery cell, and is expected to be used in a high-capacity and high-power commodity soft package lithium-sulfur battery.

Description

technical field [0001] The invention belongs to the technical research field of lithium-sulfur battery electrode materials, and specifically relates to a preparation method and application of a mycelia-based carbon film conductive framework and a method for preparing a battery (soft-packed lithium-sulfur battery). Background technique [0002] With the development of human civilization and technological innovation and progress, energy crisis and environmental pollution have become two major problems facing the world today. Constrained by renewable energy, such as solar energy, wind energy, tidal energy, and geothermal energy, which are unstable and intermittent, people turn their attention to the development and utilization of key technologies for cost-effective electrochemical energy storage systems. After nearly ten years of development, the energy density of lithium-ion batteries has approached the theoretical limit, and the actual assembled battery energy density of less...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/136H01M10/052
CPCH01M4/625H01M4/136H01M10/052H01M2004/028Y02E60/10
Inventor 燕映霖杨媛媛赵颖娟杨蓉邹一鸣钟黎声许云华刘璞方景玮樊潮江
Owner XIAN UNIV OF TECH
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