CN105428659A - Composite lithium ion battery anode - Google Patents
Composite lithium ion battery anode Download PDFInfo
- Publication number
- CN105428659A CN105428659A CN201510985402.6A CN201510985402A CN105428659A CN 105428659 A CN105428659 A CN 105428659A CN 201510985402 A CN201510985402 A CN 201510985402A CN 105428659 A CN105428659 A CN 105428659A
- Authority
- CN
- China
- Prior art keywords
- lithium ion
- active material
- positive active
- conductive additive
- ion battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
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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
- H01M4/621—Binders
- H01M4/622—Binders being polymers
- H01M4/623—Binders being polymers fluorinated polymers
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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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a composite lithium ion battery anode. The composite lithium ion battery anode is composed of an anode material and a current collector; the anode material comprises a positive active material, a conductive additive and a binding material, wherein the current collector is an aluminum foil; in the anode material, the proportion of the positive active material, the conductive additive and the binding material is 93-97 to 0.5-1.5 to 1-3; the positive active material comprises 25 to 35% of lithium nickel cobaltate, 45 to 55% of ternary material and 15 to 25% of lithium manganate; the conductive additive is a composite material of a graphite and a carbon nano tube; and the binding material is polyvinylidene fluoride. The anode of the lithium ion battery provided by the invention has good cycle capacity, conductivity and high temperature stability.
Description
Technical field
The present invention relates to a kind of positive pole of lithium ion battery.
Background technology
Lithium ion battery applications field is wide, comprises the electric terminal equipment such as mobile phone, notebook computer, or even has moved towards electric automobile and technical field of energy storage; Lithium ion battery is divided into positive pole, negative pole, barrier film, electrolyte and shell from structure.Wherein, positive electrode generally comprises positive active material, conductive agent and binding agent.
The conductive agent that current lithium ion battery is conventional is granular conductive agent, and comprise acetylene black, carbon black, Delanium and native graphite etc., another kind of conductive agent is fibrous conductive agent, metallic fiber, gas-phase growth of carbon fibre VGCF, carbon nano-tube CNTs etc.Threadiness conductive agent relative particle shape conductive agent has larger draw ratio, and be conducive to forming conductive network, and resistivity is minimum, has higher conductivity, and the phenomenon of reunion not easily appears in granular conductive agent relative fiber shape conductive agent, performance is more stable.
Along with the lithium ion battery scope of application is increasing, people require also original higher to the properties of lithium ion battery, comprise battery capacity, conductivity, fail safe and cyclical stability etc.
Summary of the invention
The object of this invention is to provide a kind of compound lithium ion cell positive, make lithium ion battery have better electric conductivity, cyclical stability and Safety and Environmental Protection.
For achieving the above object, technical scheme of the present invention is:
A kind of compound lithium ion cell positive, be made up of positive electrode and collector, wherein, positive electrode comprises positive active material, conductive additive and binding material, and collector is aluminium foil; In above-mentioned positive electrode, each components based on weight percentage, positive active material: conductive additive: binding material is 95-98:0.5-1.5:0.5-1.5; By weight percentage, above-mentioned positive active material comprises the lithium nickel cobalt dioxide of 25-35%, the ternary material of 45-55% and the LiMn2O4 of 15-25%.
More preferably, positive active material: conductive additive: binding material is 98:1:1; Positive active material comprises the lithium nickel cobalt dioxide of 28%, the ternary material of 52% and the LiMn2O4 of 20%.
More specifically, conductive additive is the composite material of graphite and carbon nano-tube, and its weight ratio is 3:7.
More specifically, above-mentioned binding material is Kynoar (PVDF).
Advantage of the present invention and beneficial effect are:
1) adopt lithium nickel cobalt dioxide, ternary material and LiMn2O4 composite material as positive active material, be conducive to the battery capacity of raising lithium ion battery, electric conductivity and security performance;
2) adopt the composite material of graphite and carbon nano-tube as conductive additive, the respective advantage of particle conductive agent and fiber posts conductive agent can be utilized, form cooperative effect, be more conducive to the high-rate discharge capacity and the cycle performance that improve anode composite lithium ion battery.
3) because above-mentioned positive active material and conductive additive all adopt composite material, be conducive to forming network-like and zyklopisch structure, improve the intensity of positive electrode, the consumption of binding agent can be reduced, and the consumption of PVDF reduces and can not only reduce costs, reduce the pollution to environment, the resistance of positive pole can also be reduced, improve the electric conductivity of battery.
Embodiment
Below in conjunction with embodiment, the specific embodiment of the present invention is further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
The technical scheme that the present invention specifically implements is:
A kind of compound lithium ion cell positive, be made up of positive electrode and collector, wherein, positive electrode comprises positive active material, conductive additive and binding material, and collector is aluminium foil; In above-mentioned positive electrode, each components based on weight percentage, positive active material: conductive additive: binding material is 98:1:1; Positive active material comprises the lithium nickel cobalt dioxide of 28%, the ternary material of 52% and the LiMn2O4 of 20%; Conductive additive is the composite material of graphite and carbon nano-tube, and its weight ratio is 3:7; Binding material is Kynoar (PVDF).
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. a compound lithium ion cell positive, is made up of positive electrode and collector, and described positive electrode comprises positive active material, conductive additive and binding material, and described collector is aluminium foil; It is characterized in that, in described positive electrode, each components based on weight percentage, positive active material: conductive additive: binding material is 95-98:0.5-1.5:0.5-1.5; By weight percentage, described positive active material comprises the lithium nickel cobalt dioxide of 25-35%, the ternary material of 45-55% and the LiMn2O4 of 15-25%.
2. according to the compound lithium ion cell positive described in claim 1, it is characterized in that, described positive active material: conductive additive: binding material is 98:1:1; Described positive active material comprises the lithium nickel cobalt dioxide of 28%, the ternary material of 52% and the LiMn2O4 of 20%.
3. according to the compound lithium ion cell positive described in claim 2, it is characterized in that, described conductive additive is the composite material of graphite and carbon nano-tube, and its weight ratio is 3:7.
4. according to the compound lithium ion cell positive described in claim 3, it is characterized in that, described binding material is Kynoar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510985402.6A CN105428659A (en) | 2015-12-25 | 2015-12-25 | Composite lithium ion battery anode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510985402.6A CN105428659A (en) | 2015-12-25 | 2015-12-25 | Composite lithium ion battery anode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105428659A true CN105428659A (en) | 2016-03-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510985402.6A Pending CN105428659A (en) | 2015-12-25 | 2015-12-25 | Composite lithium ion battery anode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105428659A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106299467A (en) * | 2016-09-13 | 2017-01-04 | 清华大学 | Composite solid electrolyte and flexible all-solid-state battery and preparation method, wearable electronic |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101420035A (en) * | 2008-05-26 | 2009-04-29 | 深圳市德方纳米科技有限公司 | Preparation of carbon nanotube conductive solution for lithium ionic secondary cell |
| CN102339981A (en) * | 2011-09-23 | 2012-02-01 | 东莞新能源科技有限公司 | Lithium ion battery and anode thereof |
-
2015
- 2015-12-25 CN CN201510985402.6A patent/CN105428659A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101420035A (en) * | 2008-05-26 | 2009-04-29 | 深圳市德方纳米科技有限公司 | Preparation of carbon nanotube conductive solution for lithium ionic secondary cell |
| CN102339981A (en) * | 2011-09-23 | 2012-02-01 | 东莞新能源科技有限公司 | Lithium ion battery and anode thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106299467A (en) * | 2016-09-13 | 2017-01-04 | 清华大学 | Composite solid electrolyte and flexible all-solid-state battery and preparation method, wearable electronic |
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Application publication date: 20160323 |
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| RJ01 | Rejection of invention patent application after publication |