CN108183210A - Anode material for lithium-ion batteries, lithium ion battery and preparation method thereof - Google Patents

Anode material for lithium-ion batteries, lithium ion battery and preparation method thereof Download PDF

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Publication number
CN108183210A
CN108183210A CN201711442838.6A CN201711442838A CN108183210A CN 108183210 A CN108183210 A CN 108183210A CN 201711442838 A CN201711442838 A CN 201711442838A CN 108183210 A CN108183210 A CN 108183210A
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lithium
lifepo4
lithium ion
lini
ion batteries
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苏凯
乔乔
陆文宁
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Beijing National Battery Technology Co Ltd
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Beijing National Battery Technology Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • H01M4/364—Composites as mixtures
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/624—Electric conductive fillers
    • H01M4/625—Carbon or graphite
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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Abstract

The present invention relates to field of lithium ion battery, specifically, providing a kind of anode material for lithium-ion batteries, lithium ion battery and preparation method thereof.The anode material for lithium-ion batteries is mainly by LiNi0.05Co0.95O2It is combined with LiFePO4, the quality of LiFePO4 is LiNi0.05Co0.95O215% 50%.The anode material for lithium-ion batteries is mainly by the LiNi of certain content0.05Co0.95O2It is combined with LiFePO4, which combines LiNi0.05Co0.95O2With the respective advantage of LiFePO4, while respective deficiency is compensated for, which can increase the use voltage range of battery, improve battery specific capacity, improve battery cycle life, simultaneously because raw material reserves are more rich thus can reduce cost.

Description

Anode material for lithium-ion batteries, lithium ion battery and preparation method thereof
Technical field
The present invention relates to field of lithium ion battery, in particular to a kind of anode material for lithium-ion batteries, lithium-ion electric Pond and preparation method thereof.
Background technology
A kind of novel Green Chemistry power supply of lithium ion battery system, has compared with traditional nickel-cadmium cell, Ni-MH battery The advantages of voltage is high, long lifespan and energy density are big.With the continuous renewal and development of lithium battery technology, light, Gao Rong, length The advantages of service life, gradually obtains the favor of consumer.Lithium battery market expands to camera, DVD, boat film, toy etc. via mobile phone Multiple fields.In recent years, lithium ion battery due to have many advantages, such as voltage is high, recycle often, storage time it is long, not only It is used widely on a portable electronic device, and is widely used in electric vehicle, electric bicycle and electronic work In terms of the large and medium-sized electrical equipment such as tool.
The performance of lithium ion battery depends primarily on positive and negative pole material, ternary anode material for lithium-ion batteries LiNixCo1-xO2 (0<x<1) by the high advantage of specific capacity, it is considered to be there is the lithium ion power battery cathode material of applications well prospect, however Its cost is slightly higher, cycle performance is general, safety is slightly worse.LiFePO4 is a kind of novel anode material for lithium-ion batteries, Security performance and cycle life are that other battery materials are incomparable, meet the needs of the frequent charge and discharge of electric vehicle, and High capacity lithium ion battery using LiFePO4 as positive electrode is more easy to be used in series, and can be provided for electric vehicle higher dynamic Power；In addition, LiFePO4 have it is nontoxic, pollution-free, have a safety feature, raw material sources are extensive, cheap, long lifespan etc. is excellent Point is the preferable positive electrode of power lithium-ion battery of new generation；However, its specific capacity is relatively low, voltage is relatively low.Searching can increase Big battery using voltage range, the positive electrode for improving battery specific capacity, improving battery cycle life while reducing cost into A research emphasis for lithium electricity industry.
In view of this, it is special to propose the present invention.
Invention content
The first object of the present invention is to provide a kind of anode material for lithium-ion batteries, which can increase battery Use voltage range, improve battery specific capacity, improve battery cycle life, simultaneously because raw material reserves are more rich thus energy Reduce cost.
The second object of the present invention is to provide a kind of lithium ion battery, which includes above-mentioned lithium ion battery Positive electrode, thus have the advantages that using voltage range is wide, specific capacity is high, have extended cycle life with it is at low cost.
The third object of the present invention is to provide a kind of preparation method of lithium ion battery, and this method is simple for process, science Rationally, the lithium ion battery being prepared have using voltage range is wide, specific capacity is high, have extended cycle life with it is at low cost excellent Point.
In order to realize the above-mentioned purpose of the present invention, spy uses following technical scheme：
In a first aspect, the present invention provides a kind of anode material for lithium-ion batteries, mainly by LiNi0.05Co0.95O2And phosphoric acid Iron lithium is combined, and the quality of LiFePO4 is LiNi0.05Co0.95O215%-50%.
As further preferred technical solution, the quality of LiFePO4 is LiNi0.05Co0.95O220%-45%.
As further preferred technical solution, the quality of LiFePO4 is LiNi0.05Co0.95O225%-40%.
As further preferred technical solution, the LiFePO4 is carbon-coated LiFePO 4 for lithium ion batteries；
Preferably, the carbon content in carbon-coated LiFePO 4 for lithium ion batteries is 0.1wt.%-15wt.%, preferably 1wt.%- 10wt.%.
Second aspect, the present invention provides a kind of lithium ion battery, including above-mentioned anode material for lithium-ion batteries.
As further preferred technical solution, negative material is further included, the negative material includes native graphite, artificial At least one of graphite or silica-base material.
The third aspect, the present invention provides a kind of preparation methods of above-mentioned lithium ion battery, include the following steps：(a) divide The anode sizing agent comprising the anode material for lithium-ion batteries and negative electrode slurry plus plate current-collecting body and negative pole currect collecting are not coated on The both sides of body, are then dried and are compacted, and form positive plate and negative plate；
(b) positive plate and negative plate are cut into required size respectively and are assembled into battery core；
(c) battery core is packed into housing, electrolyte is then injected into housing, then seal, be finally melted into and partial volume Up to the lithium ion battery.
As further preferred technical solution, the anode sizing agent further includes conductive agent and binding agent, lithium ion battery The mass ratio of positive electrode, positive conductive agent and positive electrode binder is 93-97：1-2：1-2, preferably 94-96：1-2：1-2；
Preferably, positive conductive agent includes conductive carbon black；
Preferably, positive electrode binder includes PVDF.
As further preferred technical solution, the negative electrode slurry is glued including negative material, cathode conductive agent and cathode Agent is tied, the mass ratio of negative material, cathode conductive agent and negative electrode binder is 94-96：0.5-2：1-4, preferably 94-95： 0.5-1：1-2.
As further preferred technical solution, cathode conductive agent includes conductive carbon black；
Preferably, negative electrode binder includes CMC and/or SBR；
Preferably, the mass ratio of CMC and SBR is 0.5-1.5：0.5-1.5, preferably 0.8-1.2：0.8-1.2.
Compared with prior art, beneficial effects of the present invention are：
Anode material for lithium-ion batteries provided by the invention is mainly by the LiNi of certain content0.05Co0.95O2And LiFePO4 It is combined, which combines LiNi0.05Co0.95O2With the respective advantage of LiFePO4, while compensate for it is respective not Foot, the positive electrode can increase use the voltage range of battery, improve battery specific capacity, raising battery cycle life, simultaneously Since raw material reserves are more rich thus can reduce cost.
Lithium ion battery provided by the invention includes above-mentioned anode material for lithium-ion batteries, therefore has and use voltage range Extensively, specific capacity is high, the advantages of having extended cycle life and is at low cost.
The preparation method of lithium ion battery provided by the invention is simple for process, scientific and reasonable, the lithium-ion electric being prepared Pond have the advantages that using voltage range is wide, specific capacity is high, have extended cycle life with it is at low cost.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.It is not specified in embodiment specific Condition person, the condition suggested according to normal condition or manufacturer carry out.
In a first aspect, provide a kind of anode material for lithium-ion batteries at least one embodiment, mainly by LiNi0.05Co0.95O2It is combined with LiFePO4, the quality of LiFePO4 is LiNi0.05Co0.95O215%-50%.
Above-mentioned anode material for lithium-ion batteries is mainly by the LiNi of certain content0.05Co0.95O2It is compound with LiFePO4 and Into the positive electrode combines LiNi0.05Co0.95O2With the respective advantage of LiFePO4, while respective deficiency is compensated for, it should Positive electrode can increase the use voltage range of battery, improve battery specific capacity, improve battery cycle life, simultaneously because former Material storage is more rich thus can reduce cost.
LiNixCo1-xO2(0<x<1) nickel and cobalt in are the adjacent elements of same period, and the two has similar atom half Diameter and electronic configuration, LiNixCo1-xO2Have both LiCoO2And LiNiO2The advantages of, theoretical capacity 275mAhg-1。 LiNi0.05Co0.95O2Relative to other LiNixCo1-xO2Specific capacity higher, cycle performance it is more preferable.
LiFePO4 is olivine-type structure, theoretical capacity 170mAhg-1, there is electric good cycle, safety Can be good, cheap, environmentally friendly pollution-free the advantages that.
Typical but without limitation, the quality of LiFePO4 is LiNi0.05Co0.95O215%, 20%, 25%, 30%, 35%th, 40%, 45% or 50%.
In a preferred embodiment, the quality of LiFePO4 is LiNi0.05Co0.95O220%-45%.
In a preferred embodiment, the quality of LiFePO4 is LiNi0.05Co0.95O225%-40%.
When the quality of LiFePO4 is in above-mentioned preferred range, the performance of anode material for lithium-ion batteries is more excellent, Balance between each performance is more preferable, it is thus possible to which the comprehensive performance for making lithium ion battery is more excellent, and practical application effect is more It is good.
In a preferred embodiment, the LiFePO4 is carbon-coated LiFePO 4 for lithium ion batteries.The electric conductivity of LiFePO4 Slightly worse, LiFePO4 can improve the chemical property of LiFePO4 after carbon coating forms carbon-coated LiFePO 4 for lithium ion batteries.Carbon packet Organic carbon source can be selected in the carbon source covered or inorganic carbon source, organic carbon source include but not limited to sucrose and glucose.Carbon-coated side Method includes but not limited to in-situ carbon cladding process (such as solid phase method, wet method, gas phase preparation-spray pyrolysis) and ex situ carbon coating Method.
Preferably, the carbon content in carbon-coated LiFePO 4 for lithium ion batteries is 0.1wt.%-15wt.%, preferably 1wt.%- 10wt.%.Above-mentioned carbon content it is typical but non-limiting for 0.1wt.%, 1wt.%, 2wt.%, 3wt.%, 4wt.%, 5wt.%, 6wt.%, 7wt.%, 8wt.%, 9wt.%, 10wt.%, 11wt.%, 12wt.%, 13wt.%, 14wt.% or 15wt.%.By optimizing carbon content, to advanced optimize the electric conductivity of LiFePO4.
Above-mentioned anode material for lithium-ion batteries is mainly by LiNi0.05Co0.95O2It is uniformly mixed, mixes with LiFePO4 Conjunction mode uses any one existing hybrid mode, and the present invention is to this and is not particularly limited.In addition, LiNi0.05Co0.95O2With LiFePO4 using existing.
Second aspect provides a kind of lithium ion battery at least one embodiment, including above-mentioned lithium ion battery just Pole material.The lithium ion battery includes above-mentioned anode material for lithium-ion batteries, therefore with using voltage range is wide, specific capacity High, the advantages of having extended cycle life and is at low cost.
In a preferred embodiment, negative material is further included, the negative material includes native graphite, artificial stone At least one of ink or silica-base material.Natural graphite negative electrode material be using natural flakey Scaly graphite through crushing, nodularization, The processes such as classification, passivation, surface handle to obtain, what high-crystallinity was naturally occurring.Artificial plumbago negative pole material is by easy stone The carbon (such as petroleum coke, needle coke, pitch coke) of inkization is calcined, then at a certain temperature through crushing, being classified, high temperature graphitization system , high-crystallinity is formed by high temperature graphitization.Silica-base material mainly includes crystalline silicon material and the sub- silicon materials of oxidation, The advantage of crystalline silicon material maximum is capacity height, under complete embedding lithium state the specific capacity of crystalline silicon material up to 4200mAh/g, Reach 10 times or more of graphite material or even more taller than the capacity (3860mAh/g) of lithium anode；The sub- silicon materials of oxidation Volume expansion smaller in process of intercalation, therefore cycle performance has also obtained great promotion.
Typical but non-limiting above-mentioned negative material is native graphite, Delanium, silica-base material, native graphite and people Make the combination of graphite, the combination of native graphite and silica-base material, the combination of Delanium and silica-base material or, native graphite, people Make combination of graphite and silica-base material etc..
The third aspect provides a kind of preparation method of above-mentioned lithium ion battery at least one embodiment, including with Lower step：(a) anode sizing agent comprising the anode material for lithium-ion batteries and negative electrode slurry are coated on anode collection respectively The both sides of body and negative current collector, are then dried and are compacted, and form positive plate and negative plate；
(b) positive plate and negative plate are cut into required size respectively and are assembled into battery core；
(c) battery core is packed into housing, electrolyte is then injected into housing, then seal, be finally melted into and partial volume Up to the lithium ion battery.
The preparation method of above-mentioned lithium ion battery is simple for process, scientific and reasonable, the lithium ion battery being prepared have make With voltage range is wide, specific capacity is high, have extended cycle life and be at low cost the advantages of.
In a preferred embodiment, the anode sizing agent further includes conductive agent and binding agent, and lithium ion battery is just The mass ratio of pole material, positive conductive agent and positive electrode binder is 93-97：1-2：1-2, preferably 94-96：1-2：1-2.Lithium from The mass ratio of sub- cell positive material, positive conductive agent and positive electrode binder is 93-97：1-2：During 1-2, the viscosity of anode sizing agent It is more preferable with mobility, and the content of anode material for lithium-ion batteries is moderate, the energy density for the lithium ion battery being prepared is more It is high.Typical but non-limiting above-mentioned mass ratio is 93：1：1、95：1：1、97：1：1、93：2：2、95：2：2、97：2：2、94： 1：1 or 96：2：2 etc..
Preferably, positive conductive agent includes conductive carbon black.Conductive carbon black (or conductive black) can improve anode sizing agent with Electron-transport between plus plate current-collecting body reduces the interface contact resistance of electrode, plays the role of depolarising.
Preferably, positive electrode binder includes PVDF.PVDF (Polyvinylidene Fluoride) is polyvinyladine floride.
In a preferred embodiment, the negative electrode slurry includes negative material, cathode conductive agent and cathode bonding Agent, the mass ratio of negative material, cathode conductive agent and negative electrode binder is 94-96：0.5-2：1-4, preferably 94-95：0.5- 1：1-2.The mass ratio of negative material, cathode conductive agent and negative electrode binder is 94-96：0.5-2：During 1-4, negative electrode slurry glues Degree and mobility are more preferable, and the content of negative material is moderate, the energy density higher for the lithium ion battery being prepared.Above-mentioned matter Amount than it is typical but non-limiting be 94：0.5：1、95：0.5：1、96：0.5：1、94：1：2、95：1：2、96：1：2、94：2：4、 95：2：4 or 96：2：4 etc..
In a preferred embodiment, cathode conductive agent includes conductive carbon black.
Preferably, negative electrode binder includes CMC and/or SBR.CMC (Sodium carboxymethlycellulose) is Sodium carboxymethylcellulose, SBR are a kind of styrene-butadiene latexes, and aqueous binders are by styrene (Styrene) and butadiene (Butadiene) monomer adds in emulsifier initiator etc. by emulsion polymerization copolymerization generation by medium of water, and state is solid content 50% or so aqueous emulsion.
Preferably, the mass ratio of CMC and SBR is 0.5-1.5：0.5-1.5, preferably 0.8-1.2：0.8-1.2.It is above-mentioned The typical but non-limiting mass ratio of CMC and SBR is 1：1、0.5：1.5、0.5：1、1：0.5、1：1.5、1.5：0.5 or 1.5： 1 etc..
It should be understood that unmentioned preparation process and parameter in the present invention, such as positive electrode or the grain of negative material For diameter etc. according to the conventional selection of this field, the present invention is to this and is not particularly limited.
With reference to embodiment and comparative example, the present invention will be further described in detail.
Embodiment 1
A kind of anode material for lithium-ion batteries, mainly by LiNi0.05Co0.95O2It is combined with LiFePO4, LiFePO4 Quality be LiNi0.05Co0.95O215%.
Embodiment 2
A kind of anode material for lithium-ion batteries, mainly by LiNi0.05Co0.95O2It is combined with LiFePO4, LiFePO4 Quality be LiNi0.05Co0.95O220%.
Embodiment 3
A kind of anode material for lithium-ion batteries, mainly by LiNi0.05Co0.95O2It is combined with LiFePO4, LiFePO4 Quality be LiNi0.05Co0.95O225%.
Embodiment 4
A kind of anode material for lithium-ion batteries, mainly by LiNi0.05Co0.95O2It is combined with LiFePO4, LiFePO4 Quality be LiNi0.05Co0.95O230%.
Embodiment 5
A kind of anode material for lithium-ion batteries, mainly by LiNi0.05Co0.95O2It is combined with LiFePO4, LiFePO4 Quality be LiNi0.05Co0.95O240%.
Embodiment 6
A kind of anode material for lithium-ion batteries, mainly by LiNi0.05Co0.95O2It is combined with LiFePO4, LiFePO4 Quality be LiNi0.05Co0.95O250%.
Embodiment 7
A kind of anode material for lithium-ion batteries, mainly by LiNi0.05Co0.95O2It is combined with LiFePO4, LiFePO4 Quality be LiNi0.05Co0.95O250%, LiFePO4 is carbon-coated LiFePO 4 for lithium ion batteries, carbon content 0.1wt.%.
As different from Example 6, the LiFePO4 in the present embodiment is carbon-coated LiFePO 4 for lithium ion batteries.
Embodiment 8
A kind of anode material for lithium-ion batteries, mainly by LiNi0.05Co0.95O2It is combined with LiFePO4, LiFePO4 Quality be LiNi0.05Co0.95O250%, LiFePO4 is carbon-coated LiFePO 4 for lithium ion batteries, carbon content 15wt.%.
Embodiment 9
A kind of anode material for lithium-ion batteries, mainly by LiNi0.05Co0.95O2It is combined with LiFePO4, LiFePO4 Quality be LiNi0.05Co0.95O250%, LiFePO4 is carbon-coated LiFePO 4 for lithium ion batteries, carbon content 1.3wt.%.
Unlike embodiment 7 and 8, carbon content is in the range of preferred content in the present embodiment.
Embodiment 10-18
A kind of lithium ion battery, respectively includes the anode material for lithium-ion batteries described in embodiment 1-9, and negative material is soft Carbon.
Embodiment 19
A kind of lithium ion battery, including the anode material for lithium-ion batteries described in embodiment 9, negative material is artificial stone Ink.
Embodiment 20
The preparation method of lithium ion battery described in embodiment 19, includes the following steps：(a) respectively will include the lithium from The anode sizing agent and negative electrode slurry of sub- cell positive material are coated on the both sides of plus plate current-collecting body and negative current collector, then carry out Dry and compacting, forms positive plate and negative plate；
(b) positive plate and negative plate are cut into required size respectively and are assembled into battery core；
(c) battery core is packed into housing, electrolyte is then injected into housing, then seal, be finally melted into and partial volume Up to the lithium ion battery.
Embodiment 21
The preparation method of lithium ion battery described in embodiment 19, as different from Example 20, in anode sizing agent lithium from The mass ratio of sub- cell positive material, conductive carbon black and PVDF is 95：1：2, Delanium in negative electrode slurry, conductive carbon black and negative The mass ratio of pole binding agent is 94：1：2, negative electrode binder is the combination of CMC and SBR, and the mass ratio of CMC and SBR are 1：1.
Comparative example 1
A kind of lithium ion battery, positive electrode is mainly by LiNi0.05Co0.95O2It is combined with LiFePO4, LiFePO4 Quality be LiNi0.05Co0.95O210%, negative material is Delanium.
As different from Example 19, in this comparative example the quality of LiFePO4 not in range provided by the present invention.
Comparative example 2
A kind of lithium ion battery, positive electrode is mainly by LiNi0.05Co0.95O2It is combined with LiFePO4, LiFePO4 Quality be LiNi0.05Co0.95O255%, negative material is Delanium.
As different from Example 19, in this comparative example the quality of LiFePO4 not in range provided by the present invention.
Comparative example 3
A kind of lithium ion battery, positive electrode is mainly by LiNi0.2Co0.8O2It is combined with LiFePO4, LiFePO4 Quality be LiNi0.2Co0.8O215%, negative material is Delanium.
Comparative example 4
A kind of lithium ion battery, positive electrode is mainly by LiNi0.01Co0.99O2It is combined with LiFePO4, LiFePO4 Quality be LiNi0.01Co0.99O215%, negative material is Delanium.
Comparative example 5
A kind of ion battery, positive electrode LiNi0.05Co0.95O2, negative material is Delanium.
Comparative example 6
A kind of ion battery, positive electrode are LiFePO4, and negative material is Delanium.
Battery performance test
Using lithium battery grading system successively to the lithium in the lithium ion battery and comparative example 1-6 that are obtained in embodiment 10-21 Ion battery is tested for the property, and the results are shown in Table 1.
1 performance of lithium ion battery of table tests table
Although illustrate and describing the present invention with specific embodiment, it will be appreciated that without departing substantially from the present invention's Many other change and modification can be made in the case of spirit and scope.It is, therefore, intended that in the following claims Including belonging to all such changes and modifications in the scope of the invention.

Claims (10)

1. a kind of anode material for lithium-ion batteries, which is characterized in that mainly by LiNi0.05Co0.95O2It is compound with LiFePO4 and Into the quality of LiFePO4 is LiNi0.05Co0.95O215%-50%.
2. anode material for lithium-ion batteries according to claim 1, which is characterized in that the quality of LiFePO4 is LiNi0.05Co0.95O220%-45%.
3. anode material for lithium-ion batteries according to claim 1, which is characterized in that the quality of LiFePO4 is LiNi0.05Co0.95O225%-40%.
4. according to claim 1-3 any one of them anode material for lithium-ion batteries, which is characterized in that the LiFePO4 is Carbon-coated LiFePO 4 for lithium ion batteries；
Preferably, the carbon content in carbon-coated LiFePO 4 for lithium ion batteries is 0.1wt.%-15wt.%, preferably 1wt.%-10wt.%.
5. a kind of lithium ion battery, which is characterized in that including claim 1-4 any one of them lithium ion cell positive materials Material.
6. lithium ion battery according to claim 5, which is characterized in that further include negative material, the negative material packet Include at least one of native graphite, Delanium or silica-base material.
7. the preparation method of lithium ion battery described in claim 5 or 6, which is characterized in that include the following steps：(a) respectively Anode sizing agent comprising the anode material for lithium-ion batteries and negative electrode slurry are coated on plus plate current-collecting body and negative current collector Both sides, be then dried and be compacted, form positive plate and negative plate；
(b) positive plate and negative plate are cut into required size respectively and are assembled into battery core；
(c) battery core is packed into housing, electrolyte is then injected into housing, then seal, finally carry out chemical conversion and partial volume to obtain the final product The lithium ion battery.
8. the preparation method of lithium ion battery according to claim 7, which is characterized in that the anode sizing agent, which further includes, leads Electric agent and binding agent, the mass ratio of anode material for lithium-ion batteries, positive conductive agent and positive electrode binder is 93-97：1-2：1- 2, preferably 94-96：1-2：1-2；
Preferably, positive conductive agent includes conductive carbon black；
Preferably, positive electrode binder includes PVDF.
9. the preparation method of lithium ion battery according to claim 7 or 8, which is characterized in that the negative electrode slurry includes Negative material, cathode conductive agent and negative electrode binder, the mass ratio of negative material, cathode conductive agent and negative electrode binder is 94- 96：0.5-2：1-4, preferably 94-95：0.5-1：1-2.
10. the preparation method of lithium ion battery according to claim 9, which is characterized in that cathode conductive agent includes conduction Carbon black；
Preferably, negative electrode binder includes CMC and/or SBR；
Preferably, the mass ratio of CMC and SBR is 0.5-1.5：0.5-1.5, preferably 0.8-1.2：0.8-1.2.
CN201711442838.6A 2017-12-26 2017-12-26 Anode material for lithium-ion batteries, lithium ion battery and preparation method thereof Pending CN108183210A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030003369A1 (en) * 2000-04-26 2003-01-02 Hongli Dai High performance lithium or lithium ion cell
CN101202361A (en) * 2007-04-24 2008-06-18 万向集团公司 Lithium ion battery
CN106505205A (en) * 2016-12-30 2017-03-15 先雪峰 Lithium ion battery active material and preparation method thereof, lithium ion battery electrode sizing agent, negative or positive electrode and lithium ion battery

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030003369A1 (en) * 2000-04-26 2003-01-02 Hongli Dai High performance lithium or lithium ion cell
CN101202361A (en) * 2007-04-24 2008-06-18 万向集团公司 Lithium ion battery
CN106505205A (en) * 2016-12-30 2017-03-15 先雪峰 Lithium ion battery active material and preparation method thereof, lithium ion battery electrode sizing agent, negative or positive electrode and lithium ion battery

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Application publication date: 20180619