CN110156086A - A kind of preparation method of manganate cathode material for lithium - Google Patents
A kind of preparation method of manganate cathode material for lithium Download PDFInfo
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- CN110156086A CN110156086A CN201910251325.XA CN201910251325A CN110156086A CN 110156086 A CN110156086 A CN 110156086A CN 201910251325 A CN201910251325 A CN 201910251325A CN 110156086 A CN110156086 A CN 110156086A
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 75
- 238000002360 preparation method Methods 0.000 title claims abstract description 53
- 239000010406 cathode material Substances 0.000 title claims abstract description 50
- LBSANEJBGMCTBH-UHFFFAOYSA-N manganate Chemical compound [O-][Mn]([O-])(=O)=O LBSANEJBGMCTBH-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 238000005245 sintering Methods 0.000 claims abstract description 50
- 239000000463 material Substances 0.000 claims abstract description 48
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000000498 ball milling Methods 0.000 claims abstract description 44
- 239000006230 acetylene black Substances 0.000 claims abstract description 42
- 239000011572 manganese Substances 0.000 claims abstract description 30
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 239000002243 precursor Substances 0.000 claims abstract description 20
- 150000001875 compounds Chemical class 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 19
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 15
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 150000002697 manganese compounds Chemical class 0.000 claims abstract description 10
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 9
- 229910001947 lithium oxide Inorganic materials 0.000 claims abstract description 4
- 238000010792 warming Methods 0.000 claims abstract description 4
- 238000005303 weighing Methods 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 26
- 150000002500 ions Chemical class 0.000 claims description 13
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 10
- 150000001450 anions Chemical class 0.000 claims description 10
- 150000001768 cations Chemical class 0.000 claims description 9
- GEYXPJBPASPPLI-UHFFFAOYSA-N manganese(III) oxide Inorganic materials O=[Mn]O[Mn]=O GEYXPJBPASPPLI-UHFFFAOYSA-N 0.000 claims description 5
- 229910052801 chlorine Inorganic materials 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 3
- 229910002651 NO3 Inorganic materials 0.000 claims description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 3
- 229910052772 Samarium Inorganic materials 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910052732 germanium Inorganic materials 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052746 lanthanum Inorganic materials 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 229910052711 selenium Inorganic materials 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 229910052740 iodine Inorganic materials 0.000 claims description 2
- 229940071125 manganese acetate Drugs 0.000 claims description 2
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 claims description 2
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 abstract description 33
- 239000013078 crystal Substances 0.000 abstract description 29
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 abstract description 20
- 238000004090 dissolution Methods 0.000 abstract description 9
- 229910052596 spinel Inorganic materials 0.000 abstract description 8
- 239000011029 spinel Substances 0.000 abstract description 8
- 239000008151 electrolyte solution Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 21
- 230000008569 process Effects 0.000 description 13
- 239000003792 electrolyte Substances 0.000 description 12
- 239000000126 substance Substances 0.000 description 10
- 229910015645 LiMn Inorganic materials 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 238000000354 decomposition reaction Methods 0.000 description 8
- 229910001416 lithium ion Inorganic materials 0.000 description 8
- 229910014127 LiMn2 O4 -LiMn2 O4 Inorganic materials 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 238000005868 electrolysis reaction Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 229910052808 lithium carbonate Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000011049 filling Methods 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 2
- 239000010405 anode material Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000013590 bulk material Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000005518 electrochemistry Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 150000002642 lithium compounds Chemical class 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Chemical compound O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000002345 surface coating layer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 230000005536 Jahn Teller effect Effects 0.000 description 1
- 229910003327 LiNbO3 Inorganic materials 0.000 description 1
- 229910013872 LiPF Inorganic materials 0.000 description 1
- 101150058243 Lipf gene Proteins 0.000 description 1
- 229910018663 Mn O Inorganic materials 0.000 description 1
- 229910003176 Mn-O Inorganic materials 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009831 deintercalation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000010339 dilation Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000003836 solid-state method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G45/00—Compounds of manganese
- C01G45/12—Manganates manganites or permanganates
- C01G45/1221—Manganates or manganites with a manganese oxidation state of Mn(III), Mn(IV) or mixtures thereof
- C01G45/1242—Manganates or manganites with a manganese oxidation state of Mn(III), Mn(IV) or mixtures thereof of the type [Mn2O4]-, e.g. LiMn2O4, Li[MxMn2-x]O4
-
- 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
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/40—Electric properties
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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
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention provides a kind of preparation methods of manganate cathode material for lithium, the following steps are included: according to metering than weighing lithium-containing compound, containing manganese compound, and Carbon Materials are added by certain mass percent, above-mentioned raw material are subjected to ball milling mixing, obtain precursor powder；Precursor powder is warming up to the first preset temperature, the first sintering stage is carried out, decomposes part of compounds, then cool to room temperature；By the resulting material of the first sintering stage, from room temperature to the second preset temperature, the second sintering stage is carried out, then cools down, obtains manganate cathode material for lithium.The present invention is by being added acetylene black in oxide spinel lithium and manganese dioxide, it is set to gasify after oversintering, the spheroidization of monocrystalline LiMn2O4 microscopic appearance can be controlled, reduce the area of (111) crystal face of LiMn2O4, the dissolution of the manganese in lithium manganate material in the electrolytic solution to reduce preparation, improves the crystal structural stability of lithium manganate material.
Description
Technical field
The present invention relates to technical field of lithium ion, in particular to a kind of preparation side of manganate cathode material for lithium
Method.
Background technique
LiMn2O4Positive electrode belongs to cubic system spinel structure, and theoretical capacity is 148mAh/g, possess 3.9V and
4.1V(vs.Li+/ Li) two discharge platforms, lithium ion intercalation/deintercalation is carried out in two steps, and corresponding reaction equation is as follows:
LiMn2O4 includes: that can pass through Li as the advantage of anode material for lithium-ion batteries2CO3And MnO2High temperature solid-state method is anti-
It should synthesize, step is simple, and synthesis condition requires low, technical maturity；With good thermal stability；Manganese resource is abundant, cost
It is low；Charge and discharge platform compared with other positive electrodes height, make up the deficiency on its capacity density, have preferable normal-temperature circulating performance and
Overcharging resisting ability；Lithium ion and electronic conductivity is good, it can be achieved that high power charging-discharging, meets high power requirement.But due to Jahn-
Teller effect, the reasons such as dissolution of Mn cause its practical specific discharge capacity lower, and high temperature capacity attenuation is fast, cycle performance compared with
Difference, therefore for spinelle LiMn2O4Study on the modification have very great meaning.
At present to spinelle LiMn2O4Method of modifying mainly include bulk phase-doped and surface cladding.It is bulk phase-doped to refer to pair
LiMn2O4 carries out cation or anion doped, adjusts the average valence of Mn, improves the stability of Mn, to inhibit the molten of manganese
Solution.Bulk phase-doped mainly includes cation doping, anion doped, Anion-cation multiple dope and Diversity doping.Sun
Ion doping is mainly by the way that in LiMn2O4 synthesis process, by sol-gal process or directly the methods of mixing introduces other gold
Belong to ion to realize.Anion doped mainly doping nonmetallic ion, these general nonmetallic ions include F, S, O, Cl,
Se, I etc..Composite mixed is a direction for being widely used in modification of lithium ion battery anode material research in recent years, it refers to
Two or more ion is introduced to be doped.Cooperative compensating is played between each Doped ions in the material of composite mixed synthesis
Effect while having played respective advantage respectively, also compensates for the deficiency of other materials, further perfect lithium ion battery
Performance.
Surface coated method of modifying mainly coat some compounds, as transition metal oxide containing polymer metal,
Lithium compound, fluoride, amorphous state oxide and some oxysalts etc. form the protection for resisting electrolyte erosion on surface
Layer, this layer of substance is to Li+Penetrating power it is stronger, to inhibit H+It is penetrated with electrolyte.It is acted on, can be subtracted by surface coating layer
Corrosion function of the weak electrolyte to material surface, improves the cyclical stability of material.
Although the bulk phase-doped high temperature circulation stability that can improve material to a certain extent, but it is not can avoid
It is reacted with the Free HF in electrolyte, leads to the dissolution of manganese.Along with the dissolution of manganese, thus the variation of recurring structure, and cause
Capacity attenuation.And in full battery, the manganese dissolved in electrolyte can destroy the formation of graphite cathode SEI film, so as to cause complete
Cycle performance of battery sharply declines.
Although likewise, surface coated method can also completely cut off the straight of bulk material and electrolyte to a certain extent
Contact, but due to the stress of lattice dilation repeatedly in the uneven and charge and discharge process of surface coating layer, it makes
At falling off for clad, these situations can all cause electrolyte to draw the direct contact erosion of spinel lithium manganate bulk material
Play the capacity attenuation during high temperature circulation.
Summary of the invention
In consideration of it, the invention proposes a kind of preparation methods of manganate cathode material for lithium, it is intended to solve existing LiMn2O4 just
Mn is readily dissolved in the problems in electrolyte in the material of pole.
The preparation method of manganate cathode material for lithium provided by the invention, comprising the following steps: step 1, according to metering than claiming
It takes lithium-containing compound, containing manganese compound, and Carbon Materials are added by certain mass percent, above-mentioned raw material progress ball milling is mixed
It closes, obtains precursor powder；Step 2, the precursor powder is warming up to the first preset temperature, carries out the first sintering stage,
Part of compounds is decomposed, is then cooled to room temperature；By the resulting material of the first sintering stage, from room temperature to second
Preset temperature carries out the second sintering stage, then cools down, obtain manganate cathode material for lithium.
Further, in the preparation method of above-mentioned manganate cathode material for lithium, the lithium-containing compound is the carbon of lithia, lithium
At least one of hydrochlorate, the nitrate of lithium, the acetate of lithium and hydroxide of lithium；The manganese compound that contains is MnO2、
Mn2O3, at least one of manganese nitrate and manganese acetate；The Carbon Materials are at least one of acetylene black and graphite powder.
Further, in the preparation method of above-mentioned manganate cathode material for lithium, can also add in raw material in the step 1
Enter the compound containing Doped ions.
Further, in the preparation method of above-mentioned manganate cathode material for lithium, in the step 1, the Doped ions include
The cation of at least one of Co, Al, Mg, Zn, Cr, Fe, Ni, Nb, La, Sm, Cu, Ti and Ge element；Or F, S, O, Cl, Se
With the anion or PO of at least one of I element4 3-；Or containing at least one of above-mentioned cation and the anion
Combination.
Further, in the preparation method of above-mentioned manganate cathode material for lithium, quality hundred of the Carbon Materials in raw material
Dividing than range is 5-10%.
Further, in the preparation method of above-mentioned manganate cathode material for lithium, in the step 2, to the precursor
Before end is sintered, tabletting is carried out to it.
Further, in the preparation method of above-mentioned manganate cathode material for lithium, in the step 2, by the precursor powder
According to the first preset heating rate from room temperature to the first preset temperature, and after the first preset time of heat preservation, it is cooled to room temperature.
Further, in the preparation method of above-mentioned manganate cathode material for lithium, by the resulting material of the first sintering stage,
According to the second preset heating rate, from room temperature to the second preset temperature, after keeping the temperature the second preset time, it is cooled to room temperature.
Further, in the preparation method of above-mentioned manganate cathode material for lithium, first preset heating rate be 2-10 DEG C/
Min, preferably 5 DEG C/min；First preset temperature is 550-650 DEG C, preferably 600 DEG C；First preset time is
2-8h, preferably 6h.
Further, in the preparation method of above-mentioned manganate cathode material for lithium, second preset heating rate be 2-10 DEG C/
Min, preferably 5 DEG C/min；Second preset temperature is 650-800 DEG C, preferably 700 DEG C；Second preset time is
8-12h, preferably 10h.
Further, in the preparation method of above-mentioned manganate cathode material for lithium, first sintering stage and described second is burnt
Sintering atmosphere in the knot stage is air atmosphere.
The preparation method of manganate cathode material for lithium provided by the invention, by adding in the raw material before ball milling mixing step
Enter Carbon Materials, so that it is oxidized to gaseous state after oversintering and vapor away, the spheroidization of monocrystalline LiMn2O4 microscopic appearance can be promoted, subtracted
The area of (111) crystal face of few LiMn2O4, so that the dissolution of Mn in the electrolytic solution in the manganate cathode material for lithium of preparation is reduced,
The crystal structural stability of manganate cathode material for lithium is improved, and then effectively improves the electrochemistry of manganate cathode material for lithium
Can, also, present invention process process is simple, and lower cost for material is easy to get, and is suitable for large-scale industrial production.
Detailed description of the invention
Fig. 1 is the flow chart of the preparation method of manganate cathode material for lithium provided in an embodiment of the present invention；
Fig. 2 a is that crystal habit is octahedral LiMn2O4 model structure；
Fig. 2 b is that crystal habit is polyhedral LiMn2O4 model structure；
Fig. 3 is the LiMn that ball milling premixes the sintering preparation of different content acetylene black in the embodiment of the present invention2O4The XRD of LiMn2O4
Figure；
Fig. 4 is the LiMn that ball milling premixes the sintering preparation of different content acetylene black in the embodiment of the present invention2O4Lithium manganate cathode material
Expect the LiPF in 1mol/L6In EC:DMC:EMC=1:1:1 (volume ratio) electrolyte, the charge and discharge cycles figure at 25 DEG C；
Fig. 5 is the LiMn for not mixing the premix sintering preparation of acetylene black ball milling in comparative example 12O4LiMn2O4 and the embodiment of the present invention 2
The LiMn of middle incorporation 8% acetylene black ball milling premix sintering preparation2O4LiMn2O4 charge and discharge cycles at 25 DEG C and 55 DEG C respectively
Figure；
Fig. 6 is the Li for not mixing the premix sintering preparation of acetylene black ball milling in comparative example 21.05Mn1.97Nb0.03O4Sample (A) and sheet
The Li of 8% acetylene black ball milling premix sintering preparation is mixed in inventive embodiments 41.05Mn1.97Nb0.03O4Sample (B) XRD diagram；
Fig. 7 is the Li for not mixing the premix sintering preparation of acetylene black ball milling in comparative example 21.05Mn1.97Nb0.03O4Sample (A) and sheet
The Li of 8% acetylene black ball milling premix sintering preparation is mixed in inventive embodiments 41.05Mn1.97Nb0.03O4Sample (B) filling at 25 DEG C
Discharge cycles figure；
Fig. 8 is the Li for not mixing the premix sintering preparation of acetylene black ball milling in comparative example 21.05Mn1.97Nb0.03O4Sample (A) and sheet
The Li of 8% acetylene black ball milling premix sintering preparation is mixed in inventive embodiments 41.05Mn1.97Nb0.03O4Sample (B) filling at 55 DEG C
Discharge cycles figure.
Specific embodiment
The following is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principle of the present invention, some improvements and modifications can also be made, these improvement and modification are also considered as
Protection scope of the present invention.
Refering to fig. 1, the present invention provides a kind of preparation methods of manganate cathode material for lithium, comprising the following steps:
Step S1 is added according to default metering than weighing lithium-containing compound, containing manganese compound, and by certain mass percent
Above-mentioned raw material are carried out ball milling mixing, obtain precursor powder by Carbon Materials.
Specifically, the lithium-containing compound is the acetate and lithium of lithia, the carbonate of lithium, the nitrate of lithium, lithium
At least one of hydroxide；Such as Li2CO3With LiOH etc..The manganese compound that contains is MnO2、Mn2O3, manganese nitrate and vinegar
At least one of sour manganese, such as MnO2Electrolytic manganese dioxide can be selected；The Carbon Materials are in acetylene black and graphite powder
It is at least one；Preferably acetylene black.
Carbon Materials and reactant (lithium-containing compound and contain manganese compound) are by ball milling premix, in the burning in two stages of later period
During knot, the growth of LiMn2O4 partial size is controlled, is distributed final manganate cathode material for lithium crystal grain particle size range narrower,
Final crystal morphology is set to tend to spherical polyhedral structure, it is suppressed that (111) growth of crystal face, it is suppressed that lithium manganate material is filling
With the side reaction of electrolyte in discharge process, be conducive to the chemical property for improving final product.
When it is implemented, in order to guarantee that Carbon Materials effectively can be wrapped in reaction-ure surface control crystal during the sintering process
Pattern and partial size will also guarantee vapor away with air reaction in the later period, to not influence needed for the generation of LiMn2O4 Spinel
Oxidizing atmosphere, mass percent range of the Carbon Materials in above-mentioned raw material be 5-10%, preferably 8%.
The raw material sources that the present embodiment is selected are extensive, cheap, are conducive to control preparation cost；Technical solution of the present invention
Technical process is simple, and the methods of ball milling sintering equipment is all conventional equipment, is conducive to heavy industrialization application；The present invention is using low
The short-cut method of cost realizes the control of manganate cathode material for lithium granule-morphology, effectively increases the chemical property of material.
In order to, as further optimization, the compound containing Doped ions be added in the feed to composition of raw materials.
Specifically, the Doped ions include in Co, Al, Mg, Zn, Cr, Fe, Ni, Nb, La, Sm, Cu, Ti and Ge at least
A kind of cation of element；The either anion or PO of at least one of F, S, O, Cl, Se and I element4 3-；Or containing upper
State the combination of at least one of cation with the anion.For example, available Li after doped1+yMn2-x-yAlxO4、
Li1+yMn2-x-yNbxO4-z(PO4)zDeng the lithium manganate material containing Doped ions.
When specific ball milling, Ball-milling Time 3-24h, preferably 6-15h, such as can for 6h, 8h, 10h, 12h, 15h,
18h etc..
By the step, enable lithium-containing compound, uniformly mix containing manganese compound and Carbon Materials, raw material of wood-charcoal
Material is uniformly wrapped in raw materials particles surface.
The precursor powder is warming up to the first preset temperature, carries out the first sintering stage, make part chemical combination by step S2
Object decomposes, and then cools to room temperature；By the resulting material of the first sintering stage, from room temperature to the second preset temperature,
Then it cools down, obtains manganate cathode material for lithium.
Can part of compounds be decomposed specifically, carrying out first sintering, such as contain when selecting lithium carbonate to be used as
It when lithium compound, can decompose at a certain temperature, carbonate decomposition vapors away, and partial solid phase reactant melts, lithium member
The warm-up movement diffusion under suitable sintering temperature of element and manganese element accelerates, and tentatively reaches the mixing of atomic level, while being situated between in charcoal
The fusion of zonule one by one is formed under the package of matter, conducive to the control of later period crystallite dimension and pattern.
Carry out the first stage sintering when, by the precursor powder according to the first preset heating rate from room temperature to
First preset temperature, and after the first preset time of heat preservation, it is cooled to room temperature.
When it is implemented, the first preset heating rate, the first preset temperature and the first preset time are needed according to specific
Reactant selected, such as when lithium-containing compound is lithium carbonate, when containing manganese compound being manganese dioxide, described first is default
Heating rate is 2-10 DEG C/min, preferably 5 DEG C/min；First preset temperature is 550-650 DEG C, preferably 600 DEG C；Institute
Stating the first preset time is 2-8h, preferably 6h.
When carrying out the sintering of second stage: by the resulting material of the first sintering stage, according to the second default heating speed
Degree after keeping the temperature the second preset time, is cooled to room temperature from room temperature to the second preset temperature.
When it is implemented, second preset heating rate is 2-10 DEG C/min, preferably 5 DEG C/min；Described second is pre-
If temperature is 650-800 DEG C, preferably 700 DEG C；Second preset time is 8-12h, preferably 10h.
It should be noted that the sintering process of entire step 2 can carry out under the air atmosphere in Muffle furnace.By this
It is brilliant to form cube point under suitable sintering temperature for step, elemental lithium and manganese element and other foreign cations or anion
The manganate cathode material for lithium of stone phase.
Refering to Fig. 2 a and 2b, spinel lithium manganate crystal has multiple crystal faces, and being generally the most common crystal habit has eight
Face body and polyhedron show in polyhedral LiMn2O4 model that Mn- or Mn-O is connected each face by first-principles calculations
Surface can size be arranged as (111) > (110) > (001)；Also, the spinel lithium manganate with polyhedron crystal form is in electrolyte
The meltage of middle manganese lower than the LiMn2O4 of octahedra crystal form 40% or so.The dissolution of manganese occurs mainly on (111) face, polyhedron
(111) face of polycrystalline LiMn2O4 is smaller than octahedra LiMn2O4 (111) face.In the base of the spinel lithium manganate of stoichiometric ratio
On plinth, how to go to reduce (111) face, is the key that improve high temperature circulation to reduce the dissolution of manganese during high-temperature storage.
Therefore, in the embodiment of the present invention, acetylene black and lithium carbonate, manganese dioxide are premixed by ball milling, in the sintering in two stages of later period
In the process, the growth of LiMn2O4 partial size is controlled, and keeps particle size range distribution narrower, final crystal morphology tends to spherical polyhedron
Structure, it is suppressed that (111) growth of crystal face, it is suppressed that lithium manganate material, with the side reaction of electrolyte, has in charge and discharge process
Conducive to the chemical property for improving final product.
The preparation method of manganate cathode material for lithium provided by the invention, by adding in the raw material before ball milling mixing step
Enter Carbon Materials, so that it is oxidized to gaseous state after oversintering and vapor away, the spheroidization of monocrystalline LiMn2O4 microscopic appearance can be promoted, subtracted
The area of (111) crystal face of few LiMn2O4, so that the dissolution of Mn in the electrolytic solution in the manganate cathode material for lithium of preparation is reduced,
The crystal structural stability of manganate cathode material for lithium is improved, and then effectively improves the electrochemistry of manganate cathode material for lithium
Can, also, present invention process process is simple, and lower cost for material is easy to get, and is suitable for large-scale industrial production.
It is said below by preparation method of several specific embodiments to manganate cathode material for lithium provided by the invention
It is bright.
Embodiment 1
Li is weighed according to stoichiometric ratio2CO3, electrolysis MnO2, and the acetylene black that mass percent is 5% is added, it will be above-mentioned
The material of tabletting is put into two ranks of progress in Muffle furnace by the precursor powder tabletting after ball milling by raw material ball milling mixing 6h
The sintering of section.
First stage: according to the heating rate of 5 DEG C/min, from room temperature to 600 DEG C, keeping the temperature 6h, make carbonate decomposition,
Then the cooled to room temperature in Muffle furnace；
Second stage: by first stage resulting materials, according to the heating rate of 5 DEG C/min, from room temperature to 700 DEG C,
10h is kept the temperature, then the cooled to room temperature in Muffle furnace, obtains LiMn2O4 LiMn2O4Sample.
Embodiment 2
Li is weighed according to stoichiometric ratio2CO3, electrolysis MnO2, and the acetylene black that mass percent is 8% is added, it will be above-mentioned
The material of tabletting is put into two ranks of progress in Muffle furnace by the precursor powder tabletting after ball milling by raw material ball milling mixing 6h
The sintering of section；
First stage: according to the heating rate of 5 DEG C/min, from room temperature to 600 DEG C, keeping the temperature 6h, make carbonate decomposition,
Then the cooled to room temperature in Muffle furnace；
Second stage: by first stage resulting materials, according to the heating rate of 5 DEG C/min, from room temperature to 700 DEG C,
10h is kept the temperature, then the cooled to room temperature in Muffle furnace, obtains LiMn2O4 LiMn2O4Sample.
Embodiment 3
Li is weighed according to stoichiometric ratio2CO3, electrolysis MnO2, and the acetylene black that mass percent is 10% is added, it will be upper
Raw material ball milling mixing 6h is stated, by the precursor powder tabletting after ball milling, the material of tabletting is put into Muffle furnace and carries out two
The sintering in stage；
First stage: according to the heating rate of 5 DEG C/min, from room temperature to 600 DEG C, keeping the temperature 6h, make carbonate decomposition,
Then the cooled to room temperature in Muffle furnace；
Second stage: by first stage resulting materials, according to the heating rate of 5 DEG C/min, from room temperature to 700 DEG C,
10h is kept the temperature, then the cooled to room temperature in Muffle furnace, obtains LiMn2O4 LiMn2O4Sample.
Embodiment 4
Li is weighed according to stoichiometric ratio2CO3, electrolysis MnO2、Nb2O5, and the acetylene black that mass percent is 8% is added,
The material of tabletting is put into Muffle furnace and is carried out by above-mentioned raw material ball milling mixing 6h by the precursor powder tabletting after ball milling
The sintering in two stages；
First stage: according to the heating rate of 5 DEG C/min, from room temperature to 600 DEG C, keeping the temperature 6h, make carbonate decomposition,
Then the cooled to room temperature in Muffle furnace；
Second stage: by first stage resulting materials, according to the heating rate of 5 DEG C/min, from room temperature to 700 DEG C,
10h is kept the temperature, then the cooled to room temperature in Muffle furnace, obtains Li1.05Mn1.97Nb0.03O4Sample.
Embodiment 5
Li is weighed according to stoichiometric ratio2CO3、Mn2O3, and the acetylene black that mass percent is 8% is added, by above-mentioned original
The material of tabletting is put into two stages of progress in Muffle furnace by the precursor powder tabletting after ball milling by material ball milling mixing 10h
Sintering；
First stage: according to the heating rate of 3 DEG C/min, from room temperature to 650 DEG C, keeping the temperature 8h, make carbonate decomposition,
Then the cooled to room temperature in Muffle furnace；
Second stage: by first stage resulting materials, according to the heating rate of 5 DEG C/min, from room temperature to 700 DEG C,
8h is kept the temperature, then the cooled to room temperature in Muffle furnace, obtains LiMn2O4 LiMn2O4Sample.
Embodiment 6
Li is weighed according to stoichiometric ratio2CO3, electrolysis MnO2, and the acetylene black that mass percent is 8% is added, it will be above-mentioned
The material of tabletting is put into two ranks of progress in Muffle furnace by the precursor powder tabletting after ball milling by raw material ball milling mixing 20h
The sintering of section；
First stage: according to the heating rate of 4 DEG C/min, from room temperature to 600 DEG C, keeping the temperature 2h, make carbonate decomposition,
Then the cooled to room temperature in Muffle furnace；
Second stage: by first stage resulting materials, according to the heating rate of 3 DEG C/min, from room temperature to 680 DEG C,
10h is kept the temperature, then the cooled to room temperature in Muffle furnace, obtains LiMn2O4 LiMn2O4Sample.
Embodiment 7
Li is weighed according to stoichiometric ratio2CO3, electrolysis MnO2, and the acetylene black that mass percent is 8% is added, it will be above-mentioned
The material of tabletting is put into two ranks of progress in Muffle furnace by the precursor powder tabletting after ball milling by raw material ball milling mixing 5h
The sintering of section；
First stage: according to the heating rate of 6 DEG C/min, from room temperature to 650 DEG C, keeping the temperature 2h, make carbonate decomposition,
Then the cooled to room temperature in Muffle furnace；
Second stage: by first stage resulting materials, according to the heating rate of 3 DEG C/min, from room temperature to 750 DEG C,
8h is kept the temperature, then the cooled to room temperature in Muffle furnace, obtains LiMn2O4 LiMn2O4Sample.
Comparative example 1
Identical as the condition of embodiment 2, difference is only that acetylene black is not added in the feed carries out ball milling premixed operation.
Comparative example 2
Identical as the condition of embodiment 4, difference is only that acetylene black is not added in the feed carries out ball milling premixed operation
Experimental example
In order to verify the crystal structure and chemical property of the lithium manganate material prepared in the embodiment of the present invention, to embodiment
Manganate cathode material for lithium in 1-4 and comparative example 1-2 carries out XRD test and charge and discharge cycles test respectively, as a result such as table 1 and figure
Shown in 3-8 (LiMn is represented in table and in attached drawing with LMO2O4Manganate cathode material for lithium, " LMO+5/8/10% acetylene black " are respectively
Represent in raw material premix mass percent be 5/8/10% acetylene black sintering prepare LiMn2O4Manganate cathode material for lithium；
Li1.05Mn1.97Nb0.03O4+ 8% acetylene black is represented containing doped chemical Nb in raw material, and is premixed mass percent in raw material and be
The Li of 8% acetylene black sintering preparation1.05Mn1.97Nb0.03O4Manganate cathode material for lithium):
Table 1 is corresponding 2 θ of LMO sample crystal face and diffracted intensity ratio that ball milling premixes the sintering preparation of different content acetylene black
Value.
As can be seen from Table 1, ball milling does not premix the LiMn of acetylene black sintering preparation2O4LiMn2O4 sample I(111)/I(311)、
I(111)/I(400)Ratio, hence it is evident that greater than the LiMn of other ball millings premix acetylene black sintering preparation2O4LiMn2O4 sample, illustrates sample
Crystal grain is along (111) face well-grown, and crystal is at octahedral shape.The sample of preparation, I are sintered after premix acetylene black(111)/
I(311)、I(111)/I(400)Ratio becomes smaller, and illustrates that crystal has preferred orientation trend along (311), (400) crystal face, and along (111) face
Direction growth is suppressed, and this crystal orientation structure is very beneficial for the promotion of lithium manganate material chemical property.
As seen from Figure 3, the LiMn of 1-3 of embodiment of the present invention synthesis2O4It is brilliant that the crystal form of lithium manganate material meets Fd3m point
Stone structure (JCPDS35-0782).
As seen from Figure 4, the LiMn of 1-3 of embodiment of the present invention synthesis2O4Lithium manganate material recycle the 500th week when
Specific discharge capacity is respectively 87.1mAh/g, 94.3mAh/g, 90.4mAh/g, than not mixing acetylene black ball milling premix sintered sample
500th week specific discharge capacity 84.8mAh/g wants high.
As seen from Figure 5,25 DEG C and 55 DEG C when, LMO+8% acetylene black LiMn2O4 sample obtained in the embodiment of the present invention 2
Product, first week specific discharge capacity respectively reach 123.3mAh/g and 107.4mAh/g, and at 25 DEG C and 55 DEG C, in comparative example 1 not
Mix acetylene black ball milling premix be sintered LMO LiMn2O4 sample obtained all specific discharge capacities of head be respectively 118.5mAh/g and
87.0mAh/g.As can be seen that ball milling premixes acetylene black for not premixing acetylene black and being sintered lithium manganate material obtained
It is sintered the lithium manganate material of preparation, either room temperature chemical property or high-temperature electrochemical properties, has obtained significantly mentioning
It rises.
As seen from Figure 6, Li made from the embodiment of the present invention 41.05Mn1.97Nb0.03O4+ 8% acetylene black lithium manganate material
In, in addition to a small amount of LiNbO3And Mn2O3Impurity peaks other than, XRD spectra still conforms to Fd3m spinel structure (JCPDS35-
0782)。
The Li made from the embodiment of the present invention 4 it can be seen from Fig. 7 and Fig. 81.05Mn1.97Nb0.03O4+ 8% acetylene black mangaic acid
The lithium material specific discharge capacity in 25 DEG C and 55 DEG C, cyclical stability respectively, are superior to not mix acetylene black ball milling in comparative example 2
Premix is sintered Li obtained1.05Mn1.97Nb0.03O4LiMn2O4 sample.
It in summary it can be seen, in raw material lithium-containing compound and containing acetylene black is added in manganese compound, make it after oversintering
Gasification, can promote the spheroidization of monocrystalline LiMn2O4 microscopic appearance, the area of (111) crystal face of LiMn2O4 be reduced, to reduce
The dissolution of Mn in the electrolytic solution in the lithium manganate material of preparation, improves the crystal structural stability of lithium manganate material, in turn
Effectively improve the chemical property of lithium manganate material.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (11)
1. a kind of preparation method of manganate cathode material for lithium, which comprises the following steps:
Step 1, Carbon Materials are added than weighing lithium-containing compound, containing manganese compound, and by certain mass percent according to metering, it will
Above-mentioned raw material carry out ball milling mixing, obtain precursor powder；
Step 2, the precursor powder is warming up to the first preset temperature, carries out the first sintering stage, make part of compounds point
Solution, then cools to room temperature；By the resulting material of the first sintering stage, from room temperature to the second preset temperature, carry out
Second sintering stage, then cools down, and obtains manganate cathode material for lithium.
2. the preparation method of manganate cathode material for lithium according to claim 1, which is characterized in that the lithium-containing compound is
At least one of lithia, the carbonate of lithium, the nitrate of lithium, the acetate of lithium and hydroxide of lithium；It is described to contain manganese
Conjunction object is MnO2、Mn2O3, at least one of manganese nitrate and manganese acetate；The Carbon Materials be in acetylene black and graphite powder at least
It is a kind of.
3. the preparation method of manganate cathode material for lithium according to claim 1 or 2, which is characterized in that in the step 1 also
The compound containing Doped ions can be added in raw material.
4. the preparation method of manganate cathode material for lithium as claimed in claim 3, which is characterized in that in the step 1, the doping
Ion includes the cation of at least one of Co, Al, Mg, Zn, Cr, Fe, Ni, Nb, La, Sm, Cu, Ti and Ge element；Or F,
S, the anion or PO of at least one of O, Cl, Se and I element4 3-；Or containing at least one of above-mentioned cation with it is described
The combination of anion.
5. the preparation method of manganate cathode material for lithium according to claim 1 or 2, which is characterized in that the Carbon Materials exist
Mass percent range in raw material is 5-10%.
6. the preparation method of manganate cathode material for lithium according to claim 1 or 2, which is characterized in that in the step 2,
Before being sintered to the precursor powder, tabletting is carried out to it.
7. the preparation method of manganate cathode material for lithium according to claim 1, which is characterized in that in the step 2, by institute
Precursor powder is stated according to the first preset heating rate from room temperature to the first preset temperature, and keeps the temperature the first preset time
Afterwards, it is cooled to room temperature.
8. the preparation method of manganate cathode material for lithium according to claim 7, which is characterized in that by the first sintering rank
The resulting material of section, from room temperature to the second preset temperature, keeps the temperature the second preset time according to the second preset heating rate
Afterwards, it is cooled to room temperature.
9. the preparation method of manganate cathode material for lithium according to claim 7, which is characterized in that the described first default heating
Speed is 2-10 DEG C/min, preferably 5 DEG C/min；First preset temperature is 550-650 DEG C, preferably 600 DEG C；Described
One preset time is 2-8h, preferably 6h.
10. the preparation method of manganate cathode material for lithium according to claim 8, which is characterized in that the described second default liter
Warm speed is 2-10 DEG C/min, preferably 5 DEG C/min；Second preset temperature is 650-800 DEG C, preferably 700 DEG C；It is described
Second preset time is 8-12h, preferably 10h.
11. the preparation method of manganate cathode material for lithium according to claim 1, which is characterized in that the first sintering rank
Sintering atmosphere in section and second sintering stage is air atmosphere.
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| CN114188526B (en) * | 2020-09-15 | 2024-06-28 | 中国石油化工股份有限公司 | Single crystal positive electrode material, preparation method thereof and application of single crystal positive electrode material in lithium ion battery |
| CN116425204A (en) * | 2023-04-28 | 2023-07-14 | 巴斯夫杉杉电池材料有限公司 | Spinel type lithium manganate, preparation method thereof and lithium ion battery |
| CN116425204B (en) * | 2023-04-28 | 2024-03-22 | 巴斯夫杉杉电池材料有限公司 | Spinel type lithium manganate, preparation method thereof and lithium ion battery |
| CN117246990A (en) * | 2023-11-16 | 2023-12-19 | 合肥国轩高科动力能源有限公司 | Lithium iron manganese phosphate, preparation method thereof and lithium ion battery |
| CN117246990B (en) * | 2023-11-16 | 2024-03-05 | 合肥国轩高科动力能源有限公司 | Lithium iron manganese phosphate, preparation method thereof and lithium ion battery |
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Application publication date: 20190823 |