CN110803720B - Multi-element coated modified single crystal ternary cathode material and preparation method thereof - Google Patents

Multi-element coated modified single crystal ternary cathode material and preparation method thereof Download PDF

Info

Publication number
CN110803720B
CN110803720B CN201910896271.2A CN201910896271A CN110803720B CN 110803720 B CN110803720 B CN 110803720B CN 201910896271 A CN201910896271 A CN 201910896271A CN 110803720 B CN110803720 B CN 110803720B
Authority
CN
China
Prior art keywords
cathode material
single crystal
ternary cathode
particles
element coated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201910896271.2A
Other languages
Chinese (zh)
Other versions
CN110803720A (en
Inventor
李宇东
吴建华
范江
马真
文雅
周志度
邓利远
贺亚峰
万国江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yingde Keheng New Energy Technology Co ltd
Original Assignee
Yingde Keheng New Energy Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yingde Keheng New Energy Technology Co ltd filed Critical Yingde Keheng New Energy Technology Co ltd
Priority to CN201910896271.2A priority Critical patent/CN110803720B/en
Publication of CN110803720A publication Critical patent/CN110803720A/en
Application granted granted Critical
Publication of CN110803720B publication Critical patent/CN110803720B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G53/00—Compounds of nickel
    • C01G53/006—Compounds containing, besides nickel, two or more other elements, with the exception of oxygen or hydrogen
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/26—Phosphates
    • C01B25/37—Phosphates of heavy metals
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B35/00—Boron; Compounds thereof
    • C01B35/08—Compounds containing boron and nitrogen, phosphorus, oxygen, sulfur, selenium or tellurium
    • C01B35/10—Compounds containing boron and oxygen
    • C01B35/12—Borates
    • 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
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
    • H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
    • 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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/01—Particle morphology depicted by an image
    • C01P2004/03—Particle morphology depicted by an image obtained by SEM
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
    • 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
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/028—Positive electrodes
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

The invention discloses a preparation method of a multi-element coated modified single crystal ternary cathode material, which comprises the following steps: mixing the ternary positive electrode material, phosphotungstate particles and borate particles together, preserving the heat for 2-8 hours at 200-400 ℃ in an aerobic environment, and then cooling to room temperature to form the multi-element coated modified single crystal ternary positive electrode material. The method has the advantage of improving the problems of structural fracture and cycle performance reduction of the single crystal ternary cathode material caused by surface side reaction in the charging and discharging processes.

Description

Multi-element coated modified single crystal ternary cathode material and preparation method thereof
Technical Field
The invention relates to the field of lithium ion battery anode materials, in particular to a multi-element coated modified single crystal ternary anode material and a preparation method thereof.
Background
The applicant's Beijing university of science and engineering filed an invention patent CN201811492423.4 in 2018, which discloses a surface-coated tungstic acidThe surface layer is coated with lithium tungstate and the W-doped ternary cathode material which comprises a nickel-cobalt-manganese ternary cathode material and a lithium tungstate layer attached to the outside of the nickel-cobalt-manganese ternary cathode material; the nickel-cobalt-manganese ternary positive electrode material is LiNi x Co y Mn 1-x-y O 2 Wherein x is>0.6，y>0，1-x-y>0; and doping W ions in a region of the nickel-cobalt-manganese ternary positive electrode material which extends inwards by 5-10nm to form a W ion doping layer.
The method is realized by adopting a one-step method, namely adding a tungsten source in the process of mixing a precursor and a lithium salt, and then calcining at high temperature to obtain the precursor. The surface layer coated lithium tungstate and W-doped ternary cathode material can solve the problems of poor overall cycle performance and the like of the high-nickel ternary cathode material due to unstable surface layer structure in the cycle process, and the electrochemical performance and the structural stability of the ternary cathode material are improved by utilizing the synergistic effect of coating and doping, so that the high-performance high-nickel ternary cathode material is obtained.
After the cycle lasts for 50 weeks, compared with the cycle performance of the nickel-cobalt-manganese ternary cathode material, the cycle capacity retention rate of the ternary cathode material coated with lithium tungstate and doped with W on the surface layer is about: 95 to 97.5 percent, and the cycle retention rate of the latter is 93 percent.
The technical problem that this application will solve is: in the charge and discharge process of the single crystal ternary cathode material, the contact surface of the single crystal ternary cathode material and electrolyte can generate side reaction, so that the technical problems of structural fracture, gas expansion and reduction of cycle performance are caused.
Disclosure of Invention
The invention aims to provide a preparation method of a multi-element coated modified single crystal ternary cathode material, which has the advantage of improving the problems of structural fracture and cycle performance reduction of the single crystal ternary cathode material caused by surface side reaction in the charging and discharging processes.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of a multi-element coated modified single crystal ternary cathode material comprises the following steps: mixing the ternary positive electrode material, phosphotungstate particles and borate particles together, preserving the heat for 2-8 hours at 200-400 ℃ in an aerobic environment, and then cooling to room temperature to form the multi-element coated modified single crystal ternary positive electrode material.
In the preparation method of the multi-element coated modified single crystal ternary cathode material, the ternary cathode material is LiNi x Co y Mn (1-x-y) O 2 Wherein x is more than 0 and less than or equal to 0.65, y is more than 0 and less than 1.0, and x + y is more than 0 and less than 1.0.
In the preparation method of the multi-element coated modified single crystal ternary cathode material, the mass ratio of the ternary cathode material to the phosphotungstate particles to the borate particles is 100:0.5-5:0.2-3.
In the preparation method of the multi-element coated modified single crystal ternary cathode material, the phosphotungstate particles are one of ammonium phosphotungstate and lithium phosphotungstate; the borate particles are one of lithium tetraborate and lithium metaborate.
In the above preparation method of the multi-element coated modified single crystal ternary cathode material, the oxygen volume ratio content in the aerobic environment is 20vol% -100vol%.
In the preparation method of the multi-element coated modified single crystal ternary cathode material, the method specifically comprises the following steps:
step 1: uniformly mixing a ternary positive electrode material, phosphotungstate particles and borate particles together;
and 2, step: preserving heat for 2-8 hours at 200-400 ℃ in an aerobic environment;
and step 3: cooling to room temperature to form a multi-element coated modified single crystal ternary cathode material;
the cooling time in the cooling process is 5-10 hours.
In the preparation method of the multi-element coated modified single crystal ternary cathode material, the particle size of the phosphotungstate particles is 0.1-2 um; the particle size of the borate particles is 0.1um-2um.
In the preparation method of the multi-element coated modified single crystal ternary cathode material, the particle size of the ternary cathode material is 1.0-5.0um.
In the preparation method of the multi-element coated modified single crystal ternary cathode material, the ternary cathode material, phosphotungstate particles and borate particles are mixed in a solid phase or mixed in a liquid phase.
Meanwhile, the invention also discloses a multi-element coated modified single crystal ternary cathode material which is prepared by adopting any one of the methods
Compared with the prior art, the invention has the beneficial effects that:
the invention has the advantage of improving the problems of structural fracture and cycle performance reduction caused by surface side reaction of the single crystal ternary cathode material in the charging and discharging processes.
Drawings
FIG. 1 is a scanning electron micrograph of example 1 of the present invention;
FIG. 2 is a scanning electron micrograph of example 2 of the present invention;
FIG. 3 is a scanning electron micrograph of example 3 of the present invention;
FIG. 4 is a scanning electron micrograph of example 4 of the present invention;
FIG. 5 shows the results of electrical property tests of examples 1 to 4 of the present invention and comparative example 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A preparation method of a multi-element coated modified single crystal ternary cathode material comprises the following steps:
step 1: uniformly mixing a ternary positive electrode material, phosphotungstate particles and borate particles together;
the ternary positive electrode material in the step is LiNi 0.6 Co 0.2 Mn 0.2 O 2 ；
The mass ratio of the ternary positive electrode material to the phosphotungstate particles to the borate particles is 100:0.5:0.2.
step 2: preserving the heat for 8 hours at 200 ℃ in an aerobic environment;
specifically, under a standard atmospheric pressure, in an aerobic atmosphere, the oxygen content was 50%, the oxygen aeration rate was 50ml/min, the argon content was 50%, and the argon aeration rate was 50ml/min, and gas supply was continued.
And step 3: cooling to room temperature to obtain the final product.
In this process, the cooling time was 5 hours.
The scanning electron micrograph of example 1 shows that a dot-shaped coating layer having a diameter of 10 to 200nm is present on the surface.
Example 2
A preparation method of a multi-element coated modified single crystal ternary cathode material comprises the following steps:
step 1: uniformly mixing a ternary positive electrode material, phosphotungstate particles and borate particles together;
the ternary positive electrode material in the step is LiNi 0.5 Co 0.2 Mn 0.3 O 2 ；
The mass ratio of the ternary anode material to the phosphotungstate particles to the borate particles is as follows: 100:5:3
And 2, step: preserving the heat for 4 hours at 400 ℃ in an aerobic environment;
specifically, under standard atmospheric pressure, in an aerobic atmosphere, the oxygen content is 80%, the oxygen aeration rate is 80ml/min, the argon content is 20%, the argon aeration rate is 20ml/min, and gas supply is continued. And step 3: cooling to room temperature to obtain the final product.
In this process, the cooling time was 5 hours.
The scanning electron micrograph of example 2 shows that the surface has a dot-like coating layer with a diameter of 10 to 200 nm.
Example 3
A preparation method of a multi-element coated modified single crystal ternary cathode material comprises the following steps:
step 1: uniformly mixing a ternary positive electrode material, phosphotungstate particles and borate particles together;
the ternary cathode material in the step is LiNi 0.55 Co 0.15 Mn 0.3 O 2 ；
The mass ratio of the ternary positive electrode material to the phosphotungstate particles to the borate particles is 100:1:2.
step 2: preserving the heat for 6 hours at 300 ℃ in an aerobic environment;
specifically, the oxygen content was 100% and the oxygen aeration rate was 100ml/min in an aerobic atmosphere at normal atmospheric pressure, and the gas supply was continued.
And step 3: cooling to room temperature to obtain the final product.
In the process, the cooling time is 5 hours.
The scanning electron micrograph of example 3 below shows that the surface has a dot-like coating layer with a diameter of 10 to 200 nm.
Example 4
A preparation method of a multi-element coated modified single crystal ternary cathode material comprises the following steps:
step 1: uniformly mixing a ternary positive electrode material, phosphotungstate particles and borate particles together;
the ternary positive electrode material in the step is LiNi 0.65 Co 0.15 Mn 0.2 O 2 ；
The mass ratio of the ternary anode material to the phosphotungstate particles to the borate particles is as follows: 100:4:0.5
Step 2: keeping the temperature for 7 hours at 350 ℃ in an aerobic environment;
specifically, under standard atmospheric pressure, in an aerobic atmosphere, the oxygen content was 20%, the oxygen aeration rate was 20ml/min, the argon content was 80%, and the argon aeration rate was 80ml/min, and gas supply was continued.
And step 3: cooling to room temperature to obtain the final product.
In the process, the cooling time is 5 hours.
The scanning electron micrograph of example 4 below shows that the surface has a spot-like coating layer with a diameter of 10 to 200 nm.
Comparative example 1
Referring to the method described in CN201811492423.4, the ternary cathode material is the same as that in example 1, an oxygen atmosphere is adopted, only a temperature rise stage exists, the temperature rise stage is divided into 2 stages of temperature rise, one stage is pre-temperature rise, the temperature rise rate is 2 ℃/min, the pre-temperature rise total time is 5h, and the temperature rise stage is from room temperature to 500 ℃; the method is characterized in that a calcination stage is followed, the temperature of the calcination stage is increased from 500 ℃ to 750 ℃, the temperature increasing rate is 2 ℃/min, and the total time of the calcination stage is 15h. The flow rate of oxygen in the preheating and calcining stages is controlled at 100-500ml/min.
And after the calcination stage is finished, taking out the material at the temperature of 750 ℃, cooling and testing the electrochemical performance.
According to the mass ratio of 92:5:3, weighing the ternary material, the conductive agent acetylene black and the binder PVDF, uniformly mixing with a dispersant N-methyl pyrrolidone (NMP) to form slurry, coating the slurry on a current collector aluminum foil, drying at 120 ℃, and cutting into a circular positive pole piece with the thickness of 1.56cm < 2 >. A metal lithium sheet is used as a negative electrode, and a diaphragm, the positive electrode sheet and LiPF6 (EC: DEC = 1) electrolyte are combined to assemble a 2016 type button cell in a glove box. Constant current charge and discharge test is carried out in a new power battery test system for performance test. And (3) testing conditions are as follows: current 1.0C multiplying power, cycle 100 weeks, voltage range 3.0-4.3V. The examples 1 to 4 and the comparative example 1 did not have the problems of structural fracture and flatulence during the test; test results refer to fig. 5 and table 1 below;
TABLE 1 test results of examples 1-4 and comparative example 1
Number of cycles Comparative example 1 Example 1 Example 2 Example 3 Example 4
Cycle retention at 50 weeks 94.49 97.56 96.44 95.75 96.45
Retention rate of 100 cycles 91.10 95.84 95.36 93.22 95.31
From the above tests, it was found that comparative example 1 had a significantly deteriorated discharge capacity after 18 cycles, as compared to example 1.
Therefore, the electrical properties of the material can be effectively improved by combining the phosphotungstate particles and the borate particles with a slow cooling method.

Claims (8)

1. A preparation method of a multi-element coated modified single crystal ternary cathode material is characterized by comprising the following steps: the method specifically comprises the following steps: mixing a ternary positive electrode material, phosphotungstate particles and borate particles together, preserving heat for 2-8 hours at 200-400 ℃ in an aerobic environment, and then cooling to room temperature to form a multi-element coated modified single crystal ternary positive electrode material; the cooling duration is 5-10 hours in the cooling process; the mass ratio of the ternary cathode material to the phosphotungstate particles to the borate particles is 100:0.5-5:0.2-3, and the ternary positive electrode material is LiNi x Co y Mn (1-x-y) O 2 Wherein x is more than 0 and less than or equal to 0.65, y is more than 0 and less than 1.0, and x + y is more than 0 and less than 1.0.
2. The preparation method of the multi-element coated modified single crystal ternary cathode material according to claim 1, wherein the phosphotungstate particles are one of ammonium phosphotungstate and lithium phosphotungstate; the borate particles are one of lithium tetraborate and lithium metaborate.
3. The method for preparing the multi-element coated modified single crystal ternary cathode material as claimed in claim 1, wherein the volume ratio content in the aerobic environment is 20vol% to 100vol%.
4. The preparation method of the multi-element coated modified single crystal ternary cathode material according to any one of claims 1 to 3, wherein the method specifically comprises the following steps:
step 1: uniformly mixing a ternary positive electrode material, phosphotungstate particles and borate particles together;
step 2: preserving heat for 2-8 hours at 200-400 ℃ in an aerobic environment;
and step 3: and cooling to room temperature to form the multi-element coated modified single crystal ternary cathode material.
5. The method for preparing the multi-element coated modified monocrystal ternary cathode material as claimed in claim 4, wherein the particle size of the phosphotungstate particles is 0.1-2 um; the particle size of the borate particles is 0.1um-2um.
6. The method for preparing the multi-element coated modified single crystal ternary cathode material according to claim 4, wherein the particle size of the ternary cathode material is 1.0-5.0um.
7. The method for preparing the multi-element coated modified single-crystal ternary cathode material according to claim 4, wherein the ternary cathode material, the phosphotungstate particles and the borate particles are mixed in a solid phase or mixed in a liquid phase.
8. A multi-element coated modified single crystal ternary cathode material, which is characterized by being prepared by the method of any one of claims 1 to 7.
CN201910896271.2A 2019-09-22 2019-09-22 Multi-element coated modified single crystal ternary cathode material and preparation method thereof Active CN110803720B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910896271.2A CN110803720B (en) 2019-09-22 2019-09-22 Multi-element coated modified single crystal ternary cathode material and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910896271.2A CN110803720B (en) 2019-09-22 2019-09-22 Multi-element coated modified single crystal ternary cathode material and preparation method thereof

Publications (2)

Publication Number Publication Date
CN110803720A CN110803720A (en) 2020-02-18
CN110803720B true CN110803720B (en) 2022-11-25

Family

ID=69487622

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910896271.2A Active CN110803720B (en) 2019-09-22 2019-09-22 Multi-element coated modified single crystal ternary cathode material and preparation method thereof

Country Status (1)

Country Link
CN (1) CN110803720B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114772574B (en) * 2022-05-31 2023-12-05 蜂巢能源科技股份有限公司 Method for doping positive electrode material by using heteropolyacid and/or heteropolyacid salt, positive electrode material and application
CN115832240A (en) * 2022-06-20 2023-03-21 宁德时代新能源科技股份有限公司 Positive electrode active material, method for producing same, secondary battery, battery module, battery pack, and electric device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109742336A (en) * 2018-12-07 2019-05-10 北京理工大学 A kind of surface layer coats the tertiary cathode material and preparation method of tungstate lithium and doping W
CN109768232A (en) * 2018-12-11 2019-05-17 广东邦普循环科技有限公司 A kind of complex phase doping nickel-cobalt-manganternary ternary anode material and its preparation method and application
CN110120505A (en) * 2019-05-07 2019-08-13 厦门厦钨新能源材料有限公司 Anode material for lithium-ion batteries, preparation method and lithium ion battery

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109742336A (en) * 2018-12-07 2019-05-10 北京理工大学 A kind of surface layer coats the tertiary cathode material and preparation method of tungstate lithium and doping W
CN109768232A (en) * 2018-12-11 2019-05-17 广东邦普循环科技有限公司 A kind of complex phase doping nickel-cobalt-manganternary ternary anode material and its preparation method and application
CN110120505A (en) * 2019-05-07 2019-08-13 厦门厦钨新能源材料有限公司 Anode material for lithium-ion batteries, preparation method and lithium ion battery

Also Published As

Publication number Publication date
CN110803720A (en) 2020-02-18

Similar Documents

Publication Publication Date Title
CN109301174B (en) Positive electrode material, method for producing same, and lithium secondary battery
CN110783538B (en) Ternary positive electrode material of lithium battery with metal oxide coated in gas phase and preparation method thereof
CN112421048A (en) Method for preparing graphite-coated nano-silicon lithium battery negative electrode material at low cost
CN109755513B (en) Metal selenide/C/B composite coated positive electrode material and preparation method thereof
CN109950480B (en) Preparation method of carbon-coated tin sulfide nanobelt of lithium ion battery cathode material
CN110803720B (en) Multi-element coated modified single crystal ternary cathode material and preparation method thereof
CN110391406A (en) A kind of lithium ion battery silicon oxygen negative electrode material and preparation method thereof, lithium ion battery
EP2639199A1 (en) Heterojunction nanomaterial, cathode pole piece for lithium-ion batteries, and lithium-ion battery
CN113697823A (en) Quaternary positive electrode material and preparation method and application thereof
CN112820847A (en) Silicon-based negative electrode material and preparation method thereof, lithium ion battery and electric appliance
CN115072703A (en) Composite negative electrode material and preparation method and application thereof
CN112310373B (en) Preparation method of ternary cathode material of lithium ion battery
CN105185969B (en) A kind of positive electrode and preparation method thereof
CN108183216B (en) Carbon-coated lithium-rich manganese-based positive electrode material, preparation method thereof and lithium ion battery
CN112242502A (en) Positive electrode material, modification method thereof and battery
GB2619443A (en) Graphene-based nitride negative electrode material and preparation method therefor
CN106920961B (en) Modification method of ternary material for lithium ion battery
CN111029535A (en) Composite positive electrode material of lithium ion battery and preparation method thereof
CN113003578A (en) Preparation method of high-performance SiOx-C negative electrode material of lithium ion battery
CN109962232B (en) Positive electrode active material, preparation method, positive electrode and battery
CN113003581A (en) Preparation method of SiOx-C composite negative electrode material for lithium ion battery
CN117352704B (en) Silicon anode material and preparation method and application thereof
CN116826059B (en) Lithium battery negative electrode material applied to marine environment and preparation method thereof
CN115986068B (en) Low-polarization silicon-oxygen anode material and preparation method and application thereof
CN114388763B (en) NiS/graphene@carbon composite material and preparation method and application thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant