CN110165141A - The active material of cathode of electrochemical apparatus and method for active material of cathode coating - Google Patents
The active material of cathode of electrochemical apparatus and method for active material of cathode coating Download PDFInfo
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- CN110165141A CN110165141A CN201910112533.1A CN201910112533A CN110165141A CN 110165141 A CN110165141 A CN 110165141A CN 201910112533 A CN201910112533 A CN 201910112533A CN 110165141 A CN110165141 A CN 110165141A
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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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
- 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
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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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
- H01M4/362—Composites
- H01M4/366—Composites as layered products
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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
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
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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
- 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
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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
- 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
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
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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
- H01M2004/027—Negative electrodes
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- 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
Abstract
The present invention relates to one kind for electrochemical apparatus (2), the especially active material of cathode (1) of the cathode (5) of lithium ion battery, wherein, active material of cathode (1) has each secondary granule (3) for being respectively equipped with active layer (4).The present invention is additionally related to the cathode (5) for electrochemical apparatus (2), electrochemical apparatus (2) and the method (9) for being used for coated cathode active material (2).The present invention also relates to the methods for manufacturing active material of cathode according to the present invention (1).
Description
Technical field
The present invention relates to a kind of active material of cathode for electrochemical apparatus, especially lithium ion battery cathode,
It includes each secondary granule.The invention further relates to the electrochemistry for including at least one cathode made of active material of cathode to set
It is standby and for the method to active material of cathode coating.
Background technique
Secondary granule is the particle to form substantial active material of cathode in the case.Secondary granule is by initially with powder
Small primary granule existing for last form is formed.Lithium ion battery is energy storage system, is deposited in chemistry and electrochemical energy
There is very high energy density under reservoir.Lithium ion battery is initially used for portable electronic device, such as laptop
Or mobile phone, and use is in vehicular field (motorcycle, motor vehicle, ship).
Lithium ion battery has positive electrode (in electric discharge: cathode) and negative electrode (in electric discharge: anode).The electricity of positive and negative
Pole respectively includes discharger, is electrically connected with positive or negative active material (cathode or active material of positive electrode).Cathode or anode are living
The feature of property material is especially, can reversibly store and export lithium ion.
Active material for negative electrode is, for example, silicon, and silicon can form compound with lithium atom.But also by carbon (such as
Graphite) it expands as the active material for negative electrode.In the charge state, lithium ion is stored into the active material of negative electrode.
Transition metal oxide containing lithium, such as LCO (lithium and cobalt oxides) and NMC are typically used as positive electrode (cathode)
Active material, which can reversibly store and discharge lithium ion again.It is high in particular for needing
Energy density using so-called high energy material, such as HE (high energy) NMC (nickel manganese cobalt) electrode.
It is its aging in the problems in lithium ion battery, achievable storage is substantially reduced after multiple charge cycles
Capacity.The reason is that the oxygen of active material of cathode discharges.The oxygen of discharge can not be escaped from battery pack, and can be with
Organic bath is under combustion case or even explosive reacts.Transition metal (cobalt, nickel, manganese etc.) is in common electrolysis
Solubility in matter will lead to transition metal ions (such as Co ion) from the dissolution in active material of cathode structure, and therefore
Lead to apparent capacitance loss.
There are different schemes to eliminate the above problem and to improve active material of cathode.Known solution is to utilize
Metallic compound (such as Al2O3、TiO2、AlF3Deng) coating is carried out to active material of cathode, to prevent transition metal ions
The evolution of (such as Mn ion).
It there is known a kind of active material of cathode for battery pack from 10 2,015 217 749 A1 of DE, wherein in cathode
Matcoveredn is laid on active material, protective layer is formed by the solid electrolyte layer of conducting lithium ions.The layer have conductive lithium from
The function of son and prevent contact between active material of cathode and electrolyte.Solid electrolyte layer does not form the oxygen for discharge
The barrier or reduction components of gas.
Electrode (the yin based on metal oxide for secondary lithium ion battery there is known by 2003/0039887 A1 of US
Pole), wherein cathode utilizes porous metal layer or carbon-coating coated in outside.Porous layer improves the resistance to ag(e)ing of battery
With charging and discharging capacity.This layer is not the barrier of reactant and not the oxygen for formation.
Summary of the invention
Technical problem to be solved by the present invention lies in, the improved active material of cathode for lithium ion battery is provided,
It at least partly overcomes disadvantages mentioned above.Other technical problem is to provide electrode and the electrochemical apparatus including active material of cathode
And the method for manufacturing active material of cathode.
The technical problem is by the active material of cathode of the cathode according to the present invention for electrochemical apparatus, cathode and leads to
The method for manufacturing active material of cathode is crossed to solve.
According to the first aspect of the invention, active material of cathode includes each secondary granule, and the secondary granule is set respectively
There is active layer.It can be prolonged by the active material of cathode according to the present invention including each secondary granule for being respectively equipped with active layer
The aging of slow battery.Here, active layer is used as the barrier of the oxygen for transition metal and discharge.
Coating (active layer) with metallic element also serves as the reducing agent of the oxygen for discharge.Oxygen can and metal
It chemically reacts, metal is oxidized in the chemical reaction, and is retained on active material of cathode as oxide.Respectively
The coating of a particle provides the bigger surface reacted for the oxygen with discharge, and therefore provides high oxygen capacity.
According to another aspect of the invention, the present invention includes for the method to active material of cathode coating.
Other design scheme of the invention is obtained by the application and then to the description of a preferred embodiment of the present invention.
Each particle of active material of cathode is preferably provided with the active layer thin, as uniform as possible of metallic element material,
The active layer is for example including Al, Ti, Zn, Zr and Rh element material.
By carrying out coating using the active material that metallic element is electrode according to the present invention, battery pack, outstanding can be improved
It is the service life with the battery pack of NCA (nickel cobalt aluminium) or NMC or HE-NMC (high-energy nickel manganese cobalt) active material.It is known
It is that the battery pack with these materials discharges aging more quickly based on the oxygen of active material of cathode.Metal layer, which is used as, to be directed to
The barrier of the evolution of transition metal ions (Mn, Co, Ni etc.) as the barrier for oxygen discharge and is also served as discharge
The reducing agent of oxygen.
Preferably, active layer has 0.5 to 10nm thickness.If the thickness of protective layer is excessive, protected seam is applied
If active material resistance improve and and then battery pack interior resistance improve.Meanwhile in the case where blocked up coating, pass through
The self weight of coating and own vol reduce the energy density of battery pack, benefit because coating material has no the capacity of battery pack.
Active layer be preferably it is circular and closure, thus its be used as protective layer and reducing agent.
Too thin coating (0.5nm or less) will lead to active layer based on the very low concentration of the metal material in active layer
The loss of effect.
In the presence of the scheme that is implemented as follows, wherein, coating according to the present invention and the positive electrode (yin for lithium ion battery
Pole) active material be in contact, active material be easy at such as 4.3V or bigger high voltage be included in lithium ion battery
In other components, especially electrolyte occur redox reaction.This is especially LiMO in general molecular formula2Be used for lithium ion
It is such situation in the active material of the positive electrode of battery, wherein M includes at least one in component Co, Ni, Mn and Al.
In the presence of the scheme that is implemented as follows, wherein, active material includes that general molecular formula is n (LiNi1-xMxO2)·1-n
(Li2MnO3) mistake lithiumation so-called high energy (HE) material.Here, M is related to the metal ion being made of Co and/or Mn.It is applicable in
: 0 < n < 1 and 0 < x < 1.Material be referred to as HE-NMC (high-energy nickel manganese cobalt) and it is characterized in that, its with extra high ratio
Capacity.
Coating can be laid on each secondary granule of active material.
In the presence of the scheme that is implemented as follows, wherein, the active material for manufacturing electrode is equipped with other improvement active materials
Property component.For this purpose, conductive additive and/or at least one cementing agent can be added in active material.It especially can be with
Carbon material, such as graphite are defined as conductive additive.
Polymer, especially Kynoar (PVDF), polytetrafluoroethylene (PTFE) (PTFE) and ethylene propylene diene rubber (EPDM) example
Such as it is suitable as cementing agent.
It suggested a kind of electrode for electrochemical apparatus, especially cathode comprising active material according to the present invention.
A kind of lithium ion battery is also proposed, with electrode according to the present invention, especially positive electrode (cathode), packet
Include active material of cathode according to the present invention.
In addition, battery pack includes negative electrode (anode) and the separator that is arranged between negative electrode and positive electrode.Separator
For guard electrode to prevent mutual direct contact, and therefore prevent short circuit.Meanwhile separator must assure that particle from one
A electrode to another electrode transmission.It is important, therefore, that separator is nonconducting, however there is ion as high as possible to wear
Permeability, the ion permeability especially relative to lithium ion.Material appropriate especially polymer, for example, polyolefin, polyester and
Fluorinated polymer.
Finally, battery pack includes electrolyte, transmission of the lithium ion from an electrode to another electrode can be realized.It is logical
Often, which is carried out in the form of lithium ion transport.Here, electrolyte should be able to realize smoothly passing as far as possible for lithium ion
It is defeated.Electrolyte appropriate generally includes anhydrous solvent and lithium salts.Solvent appropriate is organic carbonic ester, especially by least
For the mixture that one cyclic carbonate and at least one linear carbonate are constituted as solvent, cyclic carbonate is, for example, carbonic acid second
Enester (EC), propene carbonate (PC) and butylene (BC), linear carbonate are, for example, dimethyl carbonate (DMC), carbonic acid
Diethylester (DEC) and methyl ethyl carbonate (EMC).Salt appropriate is all lithium salts for supporting the transmission of lithium ion between the electrodes.
Subject of the present invention is the method for coated cathode active material comprising following steps:
Prepare secondary granule；
Especially with metallic element material be secondary granule carry out coating, the metallic element material include including Al,
Ti, Zn, Zr and Rh；
Active material of cathode is manufactured by secondary granule.
It, wherein, can be directly in synthesizing activity material, especially particle be in the reactor in the presence of the scheme that is implemented as follows
Pass through cohesion manufacture secondary granule during precipitation.
In the presence of the scheme that is implemented as follows, wherein, the secondary granule of active material directly utilizes metallic element material coating.
In the presence of the scheme that is implemented as follows, wherein, method can be realized very thin coating, the especially less than thickness of 10nm.
Coating can carry out herein by the method for physics, wet-chemical or machinery.Physical method appropriate is sedimentation, such as atomic layer
Deposit (ALD), chemical vapor deposition (CVD) and physical vapour deposition (PVD) (PVD).
Atomic layer deposition (atomic layer deposition, ALD) is the side for the stringer on raw material
Method.It is the multistage CVD method (chemical vapor deposition from the reaction of the surface of limitation implemented with two or more circulations
CVD).CVD method is related to the reaction of two reactive chemical raw materials in the gas phase, and raw material are deposited on substrate as coating
On.In ALD method, this method is implemented with several individual stages.Coating cycle can be repeated according to desired film thickness,
In, the film of deposition is grown layer by layer.
Physical vapour deposition (PVD) (physical vapour deposition, PVD) is following method, in the method, object
Raw material are converted to gas by reason method (with injection that is laser beam, magnetic steering ion or electronics and passing through arc discharge)
Phase.Gaseous material is directed to substrate, which condenses there and form coating.
Detailed description of the invention
The embodiment of the present invention illustratively and is described with reference to the drawings now.Wherein:
Fig. 1 shows the schematic diagram of the secondary granule of the setting active layer of active material of cathode；
Fig. 2 shows the schematic diagrames of the cathode with active material of cathode；
Fig. 3 shows the schematic diagram of electrochemical apparatus；
Fig. 4 shows the schematical stream of the embodiment of the method for the coating according to the present invention for active material of cathode
Journey.
Specific embodiment
It is shown in FIG. 1 and is used to form active material of cathode 1, secondary with the active layer 4 being made of metallic element 2
The embodiment of particle 3.Left figure shows the particle 3 of initial non-coating, the particle of non-coating individually bear coating procedure (in
Figure), 4 (middle) of active layer being made of coating material 2 is set for particle in the coating procedure.Coating is by for example implementing
The coating apparatus 10 of ALD, CVD or PVD are implemented.Each particle 3 of active material of cathode 1 has thin, uniform active layer 4,
The active layer includes metallic element material, such as Al, Ti, Zn, Zr and Rh.Active layer 4 is circular and closure.Metal layer 4
It is used as the barrier for preventing transition metal ions (Mn, Co, Ni etc.) from escaping in active material of cathode 1, is used as and is directed to oxygen
The barrier of discharge and as discharge oxygen reducing agent.Particle 3 as active material of cathode includes following compound
Any one: LMO2(M includes Co, Ni, Mn and Al), LNMO (N=Ni, M=Mn) and nLiNi1-xMxO2·(1-n)
Li2MnO3(M includes Co and/or Mn and/or Ni).
Fig. 2 shows the schematic diagrames of the cathode 5 of active material of cathode 1 for lithium ion battery, with coating.Yin
Pole 5 includes (such as being made of aluminium) conductive film, and the film is with active material of cathode 1 and auxiliary material coated.It is auxiliary
Help material (such as conductive additive and/or cementing agent) for being connected with each other secondary granule 3.
The embodiment for being configured to the electrochemical apparatus 9 of secondary lithium ion battery is schematically shown in Fig. 3.Lithium ion battery
9 include cathode 5 and anode 6.Cathode 5 and anode 6 are implemented in a thin film respectively, and are separated from each other by separator 8.Separator
8 by can pass through lithium ion diaphragm formed, diaphragm electrical isolation ground but construct while ion can be conducted.Cathode 5 includes having each time
The active material of cathode 1 of grade particles 3.The active layer 4 being made of metallic element is laid on the particle 3 of active material of cathode 1.Make
It circumferentially and is closely constructed with layer 4.Active layer 4 includes metallic element materials A l, Ti, Zn, Zr and Rh.Active layer 4 is to be directed to
The barrier of the oxygen of transition metal ions (Mn, Co, Ni etc.) evolution and discharge.Additionally, active layer is used as the oxygen formed
Reducing agent.
Anode 6 include active material of positive electrode, in a thin film or plate implement.Active material of positive electrode have graphite and/
Or silicon or silicon-containing alloy are as element material.
The medium of liquid as electrolyte 7 passes through separator 8, and part also passes through anode 6 and cathode 5 is negative in other words
Pole active material 1, and surround particle 3.Medium can conduct ion.
During the charging process, lithium ion is removed from cathode 5, is migrated by electrolyte 7 towards anode 6, and store there
Into active material 1.The reaction is reversible, and lithium ion stream flow to cathode from anode 6 in opposite direction in electric discharge
5.It is necessary that secondary granule 3 is by cementing for the effect of the active layer 4 of active material of cathode 1 according to the present invention
Agent is adhering to each other, and is adhered on metallic film, to ensure the mechanical integrity of active layer 4.
Metal function layer 4 and its thickness degree are set as unified and uniform on entire outer surface, to avoid based on office
Subsequent battery failure caused by the inhomogeneities in portion.Thickness is 0.5 to 10nm.In a further embodiment, thickness is
0.1 to 5nm or 0.5 to 3.5nm or 1 to 2nm or 1.5nm.
Fig. 4 shows the schematical process of the method for the coating according to the present invention for active material of cathode.This method
Including step 100: preparing secondary granule；Step 101: being secondary using metallic element material (including Al, Ti, Zn, Zr and Rh)
Particle carries out coating；With step 102: preparing active material of cathode by the secondary granule with Al, Ti, Zn, Zr and Rh.
Secondary granule is prepared in first method step (100).It mixes, grind and/or is sintered for synthesizing in the preparation
Compound (LMO2And nLiNi1-xMxO2·(1-n)Li2MnO3) raw material.
It is that secondary granule carries out coating using metallic element material in second method step (101).Coating directly
It is carried out on grain, and coating for example implements (such as atomic layer deposition method) in a looping fashion.Coating is often in a coating cycle
Corresponding one layer of growth.Coating cycle can be repeated in order to obtain more layers.Then control the thickness laid.Raw material are (secondary
Grade particles and metal material) it is directed in vacuum chamber.Coating cycle generally includes following steps: implemented for the first preproduction phase,
Reaction chamber is rinsed, was implemented for the second preproduction phase, and second is rinsed reaction chamber.The circulation often repeats, desired until reaching
Thickness.
Active material of cathode is prepared by the secondary granule with metal material layer in third method step (102).Here,
The secondary granule of coating is for example connected as solvent-laden material by the energy input realized via rotation tool.It is solvent-laden
Material further includes conductive additive, solvent and cementing agent other than secondary granule.Cathode material, cementing agent and conductive black
It can with dry type mix.
List of numerals
1 active material of cathode
2 coating materials
3 secondary granules
4 active layers
5 cathodes
6 anodes
7 can conduct the medium (electrolyte) of ion
8 separators
9 electrochemical apparatus
10 coating apparatus
11 method for carrying out coating for active material of cathode
100 preparations or manufacture secondary granule
101 carry out coating for secondary granule
102 manufacture active material of cathode
Claims (10)
1. one kind is for electrochemical apparatus (2), the active material of cathode (1) of the cathode (5) of especially lithium ion battery,
In, the active material of cathode (1) has each secondary granule (3) for being respectively equipped with active layer (4).
2. active material of cathode (1) according to claim 1, wherein active layer (4) includes metallic element material.
3. active material of cathode (1) according to claim 2, wherein metallic element material includes following material: Al, Ti,
Zn, Zr and Rh.
4. active material of cathode (1) according to any one of claim 1 to 3, wherein active layer (4) has 0.5nm extremely
The thickness of 10nm.
5. active material of cathode (1) according to any one of claim 1 to 4, wherein active layer (4) is configured to, especially
Any one of it is circumferentially and to be closely configured to, active layer (4) has the following properties that:
Shielding to transition metal ions (Mn, Co, Ni etc.)；
Shielding to oxygen；
The reducing agent of oxygen.
6. active material of cathode (1) according to claim 1 comprising at least one in following compound:
-LMO2, wherein M includes at least one in component Co, Ni, Mn and Al；
-nLiNi1-xMxO2·(1-n)Li2MnO3, wherein M is the metal ion being made of Co and/or Mn, and is applicable in: 0
< n < 1 and 0 < x < 1.
7. the cathode (5) that one kind is used for electrochemical apparatus (2) comprising at least one is according to claim 1 to any one of 6 institutes
The active material of cathode (1) stated.
8. a kind of electrochemical apparatus (2) comprising at least one cathode (5) according to claim 7, anode (6), conduction
The medium (7) and separator (8), the separator of ion are separated from each other cathode and anode.
9. one kind is used to manufacture the method (9) of active material of cathode according to any one of claim 1 to 6 (2),
In, the method (9) includes:
Prepare (10) secondary granule；
Using metallic element material to secondary granule coating (11), the metallic element material includes Al, Ti, Zn, Zr and Rh；
(12) active material of cathode is manufactured by the secondary granule with Al, Ti, Zn, Zr and Rh,
Wherein, coating is carried out using physics coating process, machine coating methods or wet-chemical coating process.
10. according to the method for claim 9 (9), wherein the physics coating process includes sedimentation, especially atom
Layer deposition (ALD), chemical vapor deposition (CVD) and/or physical vapour deposition (PVD) (PVD).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018202180.5A DE102018202180A1 (en) | 2018-02-13 | 2018-02-13 | Cathode active material for an electrochemical device and method for coating a cathode active material |
| DE102018202180.5 | 2018-02-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110165141A true CN110165141A (en) | 2019-08-23 |
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ID=67644813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910112533.1A Pending CN110165141A (en) | 2018-02-13 | 2019-02-13 | The active material of cathode of electrochemical apparatus and method for active material of cathode coating |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110165141A (en) |
| DE (1) | DE102018202180A1 (en) |
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