CN112864378A - Negative electrode material for lithium battery production and preparation method thereof - Google Patents

Negative electrode material for lithium battery production and preparation method thereof Download PDF

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Publication number
CN112864378A
CN112864378A CN202011621491.3A CN202011621491A CN112864378A CN 112864378 A CN112864378 A CN 112864378A CN 202011621491 A CN202011621491 A CN 202011621491A CN 112864378 A CN112864378 A CN 112864378A
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parts
mass
powder
negative electrode
lithium battery
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谭贺洵
谭青锋
胡海宏
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Foshan Xinhongteng Technology Development Co ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
    • H01M4/386—Silicon or alloys based on silicon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/60—Selection of substances as active materials, active masses, active liquids of organic compounds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/624—Electric conductive fillers
    • H01M4/625—Carbon or graphite
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
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  • Battery Electrode And Active Subsutance (AREA)
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Abstract

The invention discloses a negative electrode material for lithium battery production and a preparation method thereof, wherein the negative electrode material comprises the following raw materials in parts by weight: 35-55 parts of nano silicon powder; 15-25 parts of graphite; 10-15 parts of mesocarbon microbeads; 5-10 parts by mass of acetylene powder; 8-14 parts by mass of an adhesive; 6-10 parts of pyrolytic resin carbon; 4-6 parts by mass of a titanium oxide material; and 5-9 parts by mass of cobaltosic oxide powder. The cathode material prepared by the invention has the advantages of corrosion resistance, simple preparation, strong stability in use, long service life and the like, inhibits the corrosion damage of electrolyte to the cathode material, improves the charge and discharge amount, the rate performance and the charge and discharge times of a lithium battery, and can effectively relieve the internal stress caused by the volume change in the charge and discharge process of the electrode material and enhance the overcharge resistance of the cathode material in use by adding the cobaltosic oxide powder into the cathode material.

Description

Negative electrode material for lithium battery production and preparation method thereof
Technical Field
The invention relates to the technical field of lithium battery production, in particular to a negative electrode material for lithium battery production and a preparation method thereof.
Background
The negative electrode material of a lithium battery is various, and the negative electrode of the battery refers to the end of the power supply where the potential (potential) is low. In galvanic cells, which refer to the electrode that functions as the oxidizing electrode, the cell reaction is written to the left. From a physical point of view, it is the one pole of the electron flow in the circuit. The cathode material refers to a raw material for forming a cathode in a battery, and currently, common cathode materials include a carbon cathode material, a tin-based cathode material, a lithium-containing transition metal nitride cathode material, an alloy cathode material and a nano cathode material. Nowadays, lithium batteries are widely used.
At present, the existing negative electrode materials for lithium battery production have some defects, for example; the existing negative electrode material for lithium battery production has the defects of poor corrosion resistance, complex preparation, weak stability in use, short service life and the like in the use process, the electrolyte has corrosion damage to the negative electrode material, the charge and discharge capacity, the rate capability and the charge and discharge times of the lithium battery are reduced, the internal stress caused by volume change in the charge and discharge process cannot be relieved by the negative electrode material for lithium battery production, and the overcharge resistance of the negative electrode material in use is weakened.
Disclosure of Invention
The invention aims to provide a negative electrode material for lithium battery production and a preparation method thereof, which solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a negative electrode material for lithium battery production and a preparation method thereof comprise the following raw materials in parts by weight: 35-55 parts of nano silicon powder; 15-25 parts of graphite; 10-15 parts of mesocarbon microbeads; 5-10 parts by mass of acetylene powder; 8-14 parts by mass of an adhesive; 6-10 parts of pyrolytic resin carbon; 4-6 parts by mass of a titanium oxide material; and 5-9 parts by mass of cobaltosic oxide powder.
In a preferred embodiment of the present invention, the negative electrode material for lithium battery production includes the following raw materials and weight fractions thereof: 46 parts of nano silicon powder; 15 parts of graphite; 10 parts of mesocarbon microbeads; 5 parts by mass of acetylene powder; 10 parts by mass of a binder; 10 parts by mass of pyrolytic resin carbon; the titanium oxide material was 4 parts by mass.
In a preferred embodiment of the present invention, the negative electrode material for lithium battery production includes the following raw materials and weight fractions thereof: 40 parts of nano silicon powder; 15 parts of graphite; 10 parts of mesocarbon microbeads; 5 parts by mass of acetylene powder; 10 parts by mass of a binder; 10 parts by mass of pyrolytic resin carbon; the titanium oxide material is 4 parts by mass; the amount of the cobaltosic oxide powder was 6 parts by mass.
As a preferred embodiment of the present invention, the preparation method of the negative electrode material for lithium battery production comprises the following steps:
a. weighing the raw materials in parts by weight;
b. b, after the step a is finished, putting the weighed graphite, mesocarbon microbeads, acetylene powder and pyrolytic resin carbon into a mixer for mixing, putting the mixed mixture into a crusher for crushing, and screening the crushed mixture to obtain mixed powder A;
c. after the step b is finished, putting the mixed powder A into a high-temperature furnace, continuously introducing inert gas for calcining, wherein the calcining temperature is 200-400 ℃, the calcining time is 1-2h, obtaining a sintered block I, and cooling the sintered block I;
d. after the step c is finished, putting the cooled sintered block I into a crusher for crushing, screening the powder of the crushed sintered block I to obtain powder A, putting the screened powder A into a mixer, adding the weighed nano silicon powder, adhesive, titanium oxide material and cobaltosic oxide powder into the mixer, and mixing with the powder A to obtain a mixture B;
e. and d, after the step d is finished, putting the mixture B into a high-temperature furnace, and continuously introducing inert gas for calcining to obtain the cathode material.
In a preferred embodiment of the present invention, in the step b, the rotation speed of the mixer for mixing the materials is 800-1100 r/min, the mixing time is 10-15 min, the rotation speed of the pulverizer for pulverizing the mixed materials is 500-700 r/min, and the pulverizing time is 5-10 min.
In a preferred embodiment of the present invention, the rotation speed of the mixer for mixing the mixture in step d is 1500-2000 r/min, and the mixing time is 20-30 min.
As a preferred embodiment of the present invention, the calcination temperature in step e is 800-1000 ℃ and the calcination time is 1.5-2.5 h.
Compared with the prior art, the invention has the following beneficial effects:
the cathode material prepared by the invention has the advantages of corrosion resistance, simple preparation, strong stability in use, long service life and the like, inhibits the corrosion damage of electrolyte to the cathode material, improves the charge and discharge amount, the rate performance and the charge and discharge times of a lithium battery, and can effectively relieve the internal stress caused by the volume change in the charge and discharge process of the electrode material and enhance the overcharge resistance of the cathode material in use by adding the cobaltosic oxide powder into the cathode material.
Detailed Description
Technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
The invention provides a technical scheme that: a negative electrode material for lithium battery production and a preparation method thereof comprise the following raw materials in parts by weight: 35-55 parts of nano silicon powder; 15-25 parts of graphite; 10-15 parts of mesocarbon microbeads; 5-10 parts by mass of acetylene powder; 8-14 parts by mass of an adhesive; 6-10 parts of pyrolytic resin carbon; 4-6 parts by mass of a titanium oxide material; and 5-9 parts by mass of cobaltosic oxide powder.
Further, the negative electrode material for lithium battery production comprises the following raw materials in parts by weight: 46 parts of nano silicon powder; 15 parts of graphite; 10 parts of mesocarbon microbeads; 5 parts by mass of acetylene powder; 10 parts by mass of a binder; 10 parts by mass of pyrolytic resin carbon; the titanium oxide material was 4 parts by mass.
Further, the negative electrode material for lithium battery production comprises the following raw materials in parts by weight: 40 parts of nano silicon powder; 15 parts of graphite; 10 parts of mesocarbon microbeads; 5 parts by mass of acetylene powder; 10 parts by mass of a binder; 10 parts by mass of pyrolytic resin carbon; the titanium oxide material is 4 parts by mass; the amount of the cobaltosic oxide powder was 6 parts by mass.
Further, the preparation method of the negative electrode material for lithium battery production comprises the following preparation steps:
a. weighing the raw materials in parts by weight;
b. b, after the step a is finished, putting the weighed graphite, mesocarbon microbeads, acetylene powder and pyrolytic resin carbon into a mixer for mixing, putting the mixed mixture into a crusher for crushing, and screening the crushed mixture to obtain mixed powder A;
c. after the step b is finished, putting the mixed powder A into a high-temperature furnace, continuously introducing inert gas for calcining, wherein the calcining temperature is 200-400 ℃, the calcining time is 1-2h, obtaining a sintered block I, and cooling the sintered block I;
d. after the step c is finished, putting the cooled sintered block I into a crusher for crushing, screening the powder of the crushed sintered block I to obtain powder A, putting the screened powder A into a mixer, adding the weighed nano silicon powder, adhesive, titanium oxide material and cobaltosic oxide powder into the mixer, and mixing with the powder A to obtain a mixture B;
e. and d, after the step d is finished, putting the mixture B into a high-temperature furnace, and continuously introducing inert gas for calcining to obtain the cathode material.
Further, the rotating speed of the mixer for mixing the materials in the step b is 800-1100 r/min, the mixing time is 10-15 min, the rotating speed of the pulverizer for pulverizing the mixed materials is 500-700 r/min, and the pulverizing time is 5-10 min.
Furthermore, the rotating speed of the mixer for mixing the mixture in the step d is 1500-2000 r/min, and the mixing time is 20-30 min.
Furthermore, the calcination temperature in the step e is 800-1000 ℃, and the calcination time is 1.5-2.5 h.
Example one
The negative electrode material for producing the lithium battery comprises the following raw materials in parts by weight: 46 parts of nano silicon powder; 15 parts of graphite; 10 parts of mesocarbon microbeads; 5 parts by mass of acetylene powder; 10 parts by mass of a binder; 10 parts by mass of pyrolytic resin carbon; the titanium oxide material was 4 parts by mass.
The cathode material prepared by the invention has the advantages of corrosion resistance, simple preparation, strong stability in use, long service life and the like, inhibits the corrosion damage of the electrolyte to the cathode material, and improves the charge and discharge amount, the rate capability and the charge and discharge times of the lithium battery.
Example two
The negative electrode material for producing the lithium battery comprises the following raw materials in parts by weight: 40 parts of nano silicon powder; 15 parts of graphite; 10 parts of mesocarbon microbeads; 5 parts by mass of acetylene powder; 10 parts by mass of a binder; 10 parts by mass of pyrolytic resin carbon; the titanium oxide material is 4 parts by mass; the amount of the cobaltosic oxide powder was 6 parts by mass.
According to the invention, the cobaltosic oxide powder is added into the negative electrode material, so that the internal stress caused by volume change in the charge and discharge processes of the electrode material can be effectively relieved, and the overcharge resistance of the negative electrode material in use is enhanced.
Data parameters of the traditional lithium battery negative electrode material are as follows in table 1:
test items Number of charge and discharge Rate capability Service life Anti-overcharge characteristics
Parameter index Is less In general Is shorter Is lower than
Example a lithium battery negative electrode material data parameter table 2 is as follows:
test items Number of charge and discharge Rate capability Service life Anti-overcharge characteristics
Parameter index In general Good effect In general Is higher than
Data parameters of the lithium battery negative electrode material of example two are shown in table 3 below:
test items Number of charge and discharge Rate capability Service life Anti-overcharge characteristics
Parameter index Good effect Superior food Is longer Height of
In summary, the data in tables 1, 2 and 3 are compared to obtain that the cathode material prepared by the invention has the advantages of corrosion resistance, simple preparation, strong stability in use, long service life and the like, corrosion damage of electrolyte to the cathode material is inhibited, the charge and discharge amount, rate capability and charge and discharge frequency of a lithium battery are improved, cobaltosic oxide powder is added into the cathode material, internal stress caused by volume change in the charge and discharge process of the electrode material can be effectively relieved, and the overcharge resistance of the cathode material in use is enhanced.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (7)

1. The negative electrode material for lithium battery production is characterized in that: comprises the following raw materials in parts by weight: 35-55 parts of nano silicon powder; 15-25 parts of graphite; 10-15 parts of mesocarbon microbeads; 5-10 parts by mass of acetylene powder; 8-14 parts by mass of an adhesive; 6-10 parts of pyrolytic resin carbon; 4-6 parts by mass of a titanium oxide material; and 5-9 parts by mass of cobaltosic oxide powder.
2. The negative electrode material for lithium battery production as claimed in claim 1, wherein: comprises the following raw materials in parts by weight: 46 parts of nano silicon powder; 15 parts of graphite; 10 parts of mesocarbon microbeads; 5 parts by mass of acetylene powder; 10 parts by mass of a binder; 10 parts by mass of pyrolytic resin carbon; the titanium oxide material was 4 parts by mass.
3. The negative electrode material for lithium battery production as claimed in claim 1, wherein: comprises the following raw materials in parts by weight: 40 parts of nano silicon powder; 15 parts of graphite; 10 parts of mesocarbon microbeads; 5 parts by mass of acetylene powder; 10 parts by mass of a binder; 10 parts by mass of pyrolytic resin carbon; the titanium oxide material is 4 parts by mass; the amount of the cobaltosic oxide powder was 6 parts by mass.
4. The method for preparing a negative electrode material for lithium battery production according to claim 1, characterized in that: the preparation steps are as follows:
a. weighing the raw materials in parts by weight;
b. b, after the step a is finished, putting the weighed graphite, mesocarbon microbeads, acetylene powder and pyrolytic resin carbon into a mixer for mixing, putting the mixed mixture into a crusher for crushing, and screening the crushed mixture to obtain mixed powder A;
c. after the step b is finished, putting the mixed powder A into a high-temperature furnace, continuously introducing inert gas for calcining, wherein the calcining temperature is 200-400 ℃, the calcining time is 1-2h, obtaining a sintered block I, and cooling the sintered block I;
d. after the step c is finished, putting the cooled sintered block I into a crusher for crushing, screening the powder of the crushed sintered block I to obtain powder A, putting the screened powder A into a mixer, adding the weighed nano silicon powder, adhesive, titanium oxide material and cobaltosic oxide powder into the mixer, and mixing with the powder A to obtain a mixture B;
e. and d, after the step d is finished, putting the mixture B into a high-temperature furnace, and continuously introducing inert gas for calcining to obtain the cathode material.
5. The method for preparing a negative electrode material for lithium battery production according to claim 4, wherein: in the step b, the rotating speed of the mixer for mixing the materials is 800-1100 r/min, the mixing time is 10-15 min, the rotating speed of the pulverizer for pulverizing the mixed materials is 500-700 r/min, and the pulverizing time is 5-10 min.
6. The method for preparing a negative electrode material for lithium battery production according to claim 4, wherein: and d, the rotating speed of the mixer for mixing the mixture in the step d is 1500-2000 r/min, and the mixing time is 20-30 min.
7. The method for preparing a negative electrode material for lithium battery production according to claim 4, wherein: in the step e, the calcination temperature is 800-1000 ℃, and the calcination time is 1.5-2.5 h.
CN202011621491.3A 2020-12-31 2020-12-31 Negative electrode material for lithium battery production and preparation method thereof Pending CN112864378A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1738078A (en) * 2005-09-06 2006-02-22 天津力神电池股份有限公司 Method for preparing lithium ion cell cobaltic-cobaltous oxide negative pole material
CN103395846A (en) * 2013-08-05 2013-11-20 青岛科技大学 Preparation method and application of octahedron-shaped cobaltosic oxide anode material for lithium ion battery
CN109326782A (en) * 2018-10-10 2019-02-12 邵金容 A kind of lithium battery production negative electrode material and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1738078A (en) * 2005-09-06 2006-02-22 天津力神电池股份有限公司 Method for preparing lithium ion cell cobaltic-cobaltous oxide negative pole material
CN103395846A (en) * 2013-08-05 2013-11-20 青岛科技大学 Preparation method and application of octahedron-shaped cobaltosic oxide anode material for lithium ion battery
CN109326782A (en) * 2018-10-10 2019-02-12 邵金容 A kind of lithium battery production negative electrode material and preparation method thereof

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