CN104064741A - Efficient sulfur/carbon doped lithium cobalt oxide cathode material and preparation method thereof - Google Patents
Efficient sulfur/carbon doped lithium cobalt oxide cathode material and preparation method thereof Download PDFInfo
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- CN104064741A CN104064741A CN201410268979.0A CN201410268979A CN104064741A CN 104064741 A CN104064741 A CN 104064741A CN 201410268979 A CN201410268979 A CN 201410268979A CN 104064741 A CN104064741 A CN 104064741A
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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
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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
- H01M4/38—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
- H01M4/52—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
- H01M4/36—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
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
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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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Abstract
The invention relates to an efficient sulfur/carbon doped lithium cobalt oxide cathode material and a preparation method thereof. The efficient sulfur/carbon doped lithium cobalt oxide cathode material is prepared from the following components in parts by weight: 30 parts of sulfur/carbon composite material, 95 parts of active material, 3 parts of functional material, 6 parts of conductive material and 6 parts of binding material, wherein the functional material is 60% lithium iron nitrate solution; the cathode material is lithium cobalt oxide; the conductive agent is flake graphite. The defect of failure of lithium ion batteries caused by self-discharge of protection boards is overcome by adopting the efficient sulfur/carbon doped lithium cobalt oxide cathode material, thus improving self-discharge of the whole battery pack, achieving the aim of prolonging the lithium battery storage time and ensuring that the lithium batteries can be stored for a longer time under the condition that users do not charge the electric appliances after using the electric appliances.
Description
Technical field
The present invention relates to lithium cobaltate cathode material of a kind of efficient sulphur/charcoal doping and preparation method thereof.
Background technology
Lithium ion battery is since commercialization, and lithium ion battery positive electrode used is mostly cobalt acid lithium, cobalt acid lithium or ternary material etc., and its component is mainly that active material adds conductive agent adding additives again, and described active material is cobalt acid lithium, cobalt acid lithium or ternary etc.; It is active material that negative material adopts graphite mostly, then adds some conductive agents and binding agent; Its advantage is that capacity is higher, has extended cycle life, but cobalt resource scarcity, expensive and there is toxicity, therefore seeking excellent honest and clean, the dependable performance of price, eco-friendly positive electrode becomes the important research direction of lithium ion battery.In the past decade obtain broad research taking cobalt acid lithium as spinel-type positive electrode and the ternary material layered oxide of representative, still restricted their development prospect due to its defect existing separately.In addition, the system of positive and negative pole material composition has a common feature to discharge the later stage exactly, and especially, in the time that electric discharge finishes, voltage drop is very fast, and namely, in this voltage range the inside, the capacity of lithium ion battery has not almost had.
Summary of the invention
The technical problem to be solved in the present invention is the above-mentioned defect that how to overcome prior art, and lithium cobaltate cathode material of a kind of efficient sulphur/charcoal doping and preparation method thereof is provided.
For solving the problems of the technologies described above, lithium cobaltate cathode material of this efficient sulphur/charcoal doping by weight, by following component according to shown in ratio be prepared from, sulphur/carbon composite 30, active material 95, functional material 3, electric conducting material 6, binding material 6.
As optimization, the ferric nitrate lithium solution that described functional material is 60%.
As optimization, described positive electrode is cobalt acid lithium.
As optimization, described conductive agent is crystalline flake graphite.
The lithium cobaltate cathode material preparation method of this efficient sulphur/charcoal doping comprises the following steps:
(1) according to above-mentioned weight ratio, material with carbon element and sublimed sulfur or Cosan are put into zirconium dioxide or agate jar, in glove box, ball grinder is injected after high purity inert gas, be placed in ball milling 5h on planetary ball mill, rotational speed of ball-mill is 500 r/min, and the mass ratio of elemental sulfur and carbon is 1:2 ~ 3: 2; Obtain sulphur/carbon composite, this sulphur/carbon composite is warming up to 180 DEG C with the rate of heat addition of 6 DEG C/min in baking oven, and be incubated 24h at this temperature;
(2) sulphur/carbon composite, active material, functional material, electric conducting material, binding material are mixed, being dispersed in volume ratio is in the water of 3:1 and the mixed solvent of acetone, water or chloroform, and ultrasonic or stirring, disperses it completely equably;
(3), under ice-water bath and inert atmosphere protection, add ammonium persulfate aqueous solution or FeCl
3chloroformic solution, stirring reaction 24h under constant temperature, then by product centrifugation, washing, the vacuum drying chamber of putting into 60 DEG C is dried, and is ground to powder.
The lithium cobaltate cathode material preparation method method of a kind of efficient sulphur of the present invention/charcoal doping is simple; with low cost; overcome lithium ion battery causes inefficacy defect because of baffle self discharge; thereby improve the self discharge of whole battery pack; realize and extend the object of lithium battery resting period, ensure that user uses electrical appliance and can store the longer time in the situation of not charging.
Embodiment
Lithium cobaltate cathode material of this efficient sulphur/charcoal doping by weight, by following component according to shown in ratio be prepared from, sulphur/carbon composite 30, active material 95, functional material 3, electric conducting material 6, binding material 6.Described functional material is 60% ferric nitrate lithium solution.Described positive electrode is cobalt acid lithium.Described conductive agent is crystalline flake graphite
The lithium cobaltate cathode material preparation method of this efficient sulphur/charcoal doping comprises the following steps:
(1) according to above-mentioned weight ratio, material with carbon element and sublimed sulfur or Cosan are put into zirconium dioxide or agate jar, in glove box, ball grinder is injected after high purity inert gas, be placed in ball milling 5h on planetary ball mill, rotational speed of ball-mill is 500 r/min, and the mass ratio of elemental sulfur and carbon is 1:2 ~ 3: 2; Obtain sulphur/carbon composite, this sulphur/carbon composite is warming up to 180 DEG C with the rate of heat addition of 6 DEG C/min in baking oven, and be incubated 24h at this temperature;
(2) sulphur/carbon composite, active material, functional material, electric conducting material, binding material are mixed, being dispersed in volume ratio is in the water of 3:1 and the mixed solvent of acetone, water or chloroform, and ultrasonic or stirring, disperses it completely equably;
(3), under ice-water bath and inert atmosphere protection, add ammonium persulfate aqueous solution or FeCl
3chloroformic solution, stirring reaction 24h under constant temperature, then by product centrifugation, washing, the vacuum drying chamber of putting into 60 DEG C is dried, and is ground to powder.
The present invention includes but be not limited to above-mentioned execution mode, any product that meets the description of these claims, within all falling into protection scope of the present invention.
Claims (5)
1. the lithium cobaltate cathode material of efficient sulphur/charcoal doping, it is characterized in that: by weight, the lithium cobaltate cathode material of this efficient sulphur/charcoal doping by following component according to shown in ratio be prepared from, sulphur/carbon composite 30, active material 95, functional material 3, electric conducting material 6, binding material 6.
2. the lithium cobaltate cathode material of efficient sulphur according to claim 1/charcoal doping, is characterized in that: the ferric nitrate lithium solution that described functional material is 60%.
3. the lithium cobaltate cathode material of efficient sulphur according to claim 1/charcoal doping, is characterized in that: described positive electrode is cobalt acid lithium.
4. the lithium cobaltate cathode material of efficient sulphur according to claim 1/charcoal doping, is characterized in that: described conductive agent is crystalline flake graphite.
5. the lithium cobaltate cathode material preparation method of efficient sulphur/charcoal doping, it is characterized in that: the lithium cobaltate cathode material of described efficient sulphur/charcoal doping is the lithium cobaltate cathode material of claim 1 ~ 4 arbitrary described efficient sulphur/charcoal doping, and its preparation method comprises the following steps:
(1) according to above-mentioned weight ratio, material with carbon element and sublimed sulfur or Cosan are put into zirconium dioxide or agate jar, in glove box, ball grinder is injected after high purity inert gas, be placed in ball milling 5h on planetary ball mill, rotational speed of ball-mill is 500 r/min, and the mass ratio of elemental sulfur and carbon is 1:2 ~ 3: 2; Obtain sulphur/carbon composite, this sulphur/carbon composite is warming up to 180 DEG C with the rate of heat addition of 6 DEG C/min in baking oven, and be incubated 24h at this temperature;
(2) sulphur/carbon composite, active material, functional material, electric conducting material, binding material are mixed, being dispersed in volume ratio is in the water of 3:1 and the mixed solvent of acetone, water or chloroform, and ultrasonic or stirring, disperses it completely equably;
(3), under ice-water bath and inert atmosphere protection, add ammonium persulfate aqueous solution or FeCl
3chloroformic solution, stirring reaction 24h under constant temperature, then by product centrifugation, washing, the vacuum drying chamber of putting into 60 DEG C is dried, and is ground to powder.
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| CN201410268979.0A CN104064741A (en) | 2014-06-17 | 2014-06-17 | Efficient sulfur/carbon doped lithium cobalt oxide cathode material and preparation method thereof |
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| CN201410268979.0A CN104064741A (en) | 2014-06-17 | 2014-06-17 | Efficient sulfur/carbon doped lithium cobalt oxide cathode material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767190A (en) * | 2018-05-25 | 2018-11-06 | 吕军 | A kind of formula of spray unmanned plane lithium battery dispensing |
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2014
- 2014-06-17 CN CN201410268979.0A patent/CN104064741A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767190A (en) * | 2018-05-25 | 2018-11-06 | 吕军 | A kind of formula of spray unmanned plane lithium battery dispensing |
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