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Method for preparing lithium battery negative electrode material via pyrolytic biomacromolecules

A technology of biological macromolecules and negative electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problem of product electrochemical performance decline, poor product thermal stability, current density and charge-discharge cycle performance cannot be further improved, etc. problem to avoid agglomeration

Inactive Publication Date: 2019-06-14
徐冬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is: the current density and charge-discharge cycle performance cannot be further improved during the use of traditional lithium-ion battery negative electrode materials, and the poor thermal stability of the product leads to obvious decline in the electrochemical performance of the product. The disadvantages of keeping at a high level for a long time provide a method for preparing lithium battery anode materials by pyrolyzing biomacromolecules

Method used

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  • Method for preparing lithium battery negative electrode material via pyrolytic biomacromolecules

Examples

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example 1

[0026] Mix chitosan and water in a mass ratio of 1:10 and pour it into a beaker, stir and mix with a glass rod for 20 minutes, then add chitosan enzyme with 3% chitosan mass to the beaker, and move the beaker to several Display speed and constant temperature magnetic stirrer, at a temperature of 35°C and a rotation speed of 500r / min, stir the enzymolysis at a constant temperature for 20 minutes, then raise the temperature to 95°C, keep warm for 15 minutes to kill the enzyme, and then transfer the material in the beaker to a rotary evaporator. At a pressure of 450mmHg and a temperature of 85°C, concentrate under reduced pressure for 15 minutes, and discharge the material to obtain a chitosan enzymatic hydrolysis solution; mix sepiolite and 10% hydrochloric acid in a mass ratio of 1:10 and pour into water In a hot kettle, at a temperature of 160°C and a rotational speed of 600r / min, after hydrothermal stirring and reaction for 5 hours, filter to obtain a filter cake, and wash the...

example 2

[0028] Mix chitosan and water in a mass ratio of 1:10 and pour it into a beaker, stir and mix with a glass rod for 20 minutes, then add chitosan enzyme with 3% chitosan mass to the beaker, and move the beaker to several Display speed and constant temperature magnetic stirrer, at a temperature of 35°C and a rotation speed of 500r / min, stir the enzymolysis at a constant temperature for 20 minutes, then raise the temperature to 95°C, keep warm for 15 minutes to kill the enzyme, and then transfer the material in the beaker to a rotary evaporator. At a pressure of 450mmHg and a temperature of 85°C, concentrate under reduced pressure for 15 minutes, and discharge the material to obtain a chitosan enzymatic hydrolysis solution; mix sepiolite and 10% hydrochloric acid in a mass ratio of 1:10 and pour into water In a hot kettle, at a temperature of 160°C and a rotational speed of 600r / min, after hydrothermal stirring and reaction for 5 hours, filter to obtain a filter cake, and wash the...

example 3

[0030]Mix chitosan and water in a mass ratio of 1:10 and pour it into a beaker, stir and mix with a glass rod for 20 minutes, then add chitosan enzyme with 3% chitosan mass to the beaker, and move the beaker to several Display speed and constant temperature magnetic stirrer, at a temperature of 35°C and a rotation speed of 500r / min, stir the enzymolysis at a constant temperature for 20 minutes, then raise the temperature to 95°C, keep warm for 15 minutes to kill the enzyme, and then transfer the material in the beaker to a rotary evaporator. At a pressure of 450mmHg and a temperature of 85°C, concentrate under reduced pressure for 15 minutes, and discharge the material to obtain a chitosan enzymatic hydrolysis solution; mix sepiolite and 10% hydrochloric acid in a mass ratio of 1:10 and pour into water In a hot kettle, at a temperature of 160°C and a rotational speed of 600r / min, after hydrothermal stirring and reaction for 5 hours, filter to obtain a filter cake, and wash the ...

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Abstract

The invention discloses a method for preparing a lithium battery negative electrode material via pyrolytic biomacromolecules, and belongs to the technical field of battery materials. The method disclosed by the invention comprises the following steps: firstly using a plurality of biomacromolecules as raw materials, and compounding the biomacromolecules with sepiolite and the like to prepare a spinning solution, performing ice crystal electrostatic spinning and drying to obtain a composite biomacromolecule fiber, mixing and dispersing the composite biomacromolecule fiber with silicate diluent and nanometer iron powder, performing a heating and stirring reaction, then performing filtering, washing and drying to obtain a load biomacromolecule fiber; dipping the load biomacromolecule fiber ina polyvinyl alcohol solution, performing drying, and controlling different heating rates and reaction temperatures to prepare pyrolytic biomacromolecules, grinding and mixing the pyrolytic biomacromolecules with superconducting carbon black and a battery binder, coating the mixture on a copper foil current collector, and performing drying and perforating to obtain the lithium battery negative electrode material. The lithium battery negative electrode material prepared by the technical scheme provided by the invention has the advantages of excellent current density and charge and discharge cycle performance.

Description

technical field [0001] The invention discloses a method for preparing negative electrode materials of lithium batteries by pyrolyzing biological macromolecules, and belongs to the technical field of battery materials. Background technique [0002] The negative pole refers to the end of the power supply with a lower potential (potential). In a primary battery, it refers to the electrode that oxidizes, and it is written on the left in the battery reaction. From a physical point of view, it is a pole from which electrons flow out of the circuit. The negative electrode material refers to the raw material that constitutes the negative electrode in the battery. At present, the common negative electrode materials include carbon negative electrode materials, tin-based negative electrode materials, lithium-containing transition metal nitride negative electrode materials, alloy negative electrode materials and nanoscale negative electrode materials. The negative electrode of the lit...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/485H01M4/587H01M4/62H01M10/0525
CPCY02E60/10
Inventor 徐冬
Owner 徐冬