CN104966836A - Method for improving electrochemical performance of LiFePO4 through polypyrrole/graphene - Google Patents
Method for improving electrochemical performance of LiFePO4 through polypyrrole/graphene Download PDFInfo
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- CN104966836A CN104966836A CN201510350773.7A CN201510350773A CN104966836A CN 104966836 A CN104966836 A CN 104966836A CN 201510350773 A CN201510350773 A CN 201510350773A CN 104966836 A CN104966836 A CN 104966836A
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- lifepo4
- polypyrrole
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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
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
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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 invention relates to the technical field of lithium battery manufacturing and provides a method for improving the electrochemical performance of LiFePO4 through polypyrrole/graphene. According to the method, pyrrole is subjected to oxidation and automatic polymerization, and oxidized graphene is subjected to chemical reduction. The method comprises the steps that the pyrrole is oxidized and polymerized into polypyrrole; the oxidized graphene is reduced into grapheme by the pyrrole; a polypyrrole/graphene composite layer with the conductivity and corrosion resistance is formed on the surface of LiFePO4 powder in treating fluid through one-time operation. According to the method, the operating process and the technology are simple; organic solvent, surface active agents, reducing agents and oxidizing agents do not need to be added in the forming process of the composite layer, and therefore the production cost is low. Meanwhile, compared with simple mechanical mixing, atomic-scale chemical reduction automatic polymerization reaction attachment can produce higher combination degree and uniformity, and accordingly the rate discharge performance and cyclic stability of the LiFePO4 can be obviously improved.
Description
Technical field
What the present invention relates to is a kind of method of lithium battery manufacturing technology field, specifically a kind ofly applies the method that polypyrrole/graphene improves electrochemical performances of lithium iron phosphate.
Background technology
Along with the problem of environmental pollution using fossil energy to cause is day by day serious, green, free of contamination New Energy Industry more and more causes the attention of people.As one of the representative of New Energy Industry, lithium ion battery industry was obtaining swift and violent development in recent years.A kind of high energy green battery that lithium ion battery gets up as fast development in recent years, compared with other secondary cell, has that energy density is high, power output is large, memory-less effect, good cycle and the advantage such as environmental pollution is little, has a extensive future.But relative to other lithium ion battery material, the development of its positive electrode is comparatively slow, has become the principal element that restriction lithium ion battery overall performance improves.
In recent years, there is the LiFePO4 (LiFePO of olivine structural
4) positive electrode becomes one of current study hotspot because of advantages such as it is cheap, environmental friendliness, specific capacity are high and good high-temperature electrochemical properties, but still the problems such as the diffusion coefficient that there is lithium ion is little, electronics and ionic conductivity is low, high current density charge-discharge performance difference.Therefore LiFePO is improved
4electric conductivity, improve high rate during charging-discharging and high rate performance is LiFePO
4the key content of investigation of materials work.
Through finding the retrieval of prior art, open (bulletin) the day 2014.08.27 of Chinese patent literature CN104009232A, discloses a kind of preparation method of iron phosphate compound anode material of lithium.After LiFePO4 and polypyrrole fiber are first uniformly dispersed by the inventive method in absolute ethyl alcohol, spraying dry, nodularization fusion treatment again, then calcine under inert atmosphere conditions, ball milling screening after namely obtain LiFePO4 and nitrogenous carbon fiber composite positive pole.This technology address the preparation method of composite material, step is complicated, polymer cost is high, and the time is longer, and operating process is wayward; In involved lithium ion battery applications, Expected Results is limited and improve the demand that performance of lithium ion battery degree is not enough to meet electrokinetic cell market.
Polypyrrole (PPy) is a kind of heterocycle conjugated type straight-chain conducting polymer, and conductivity can reach 10 ~ 103S/cm, have that property stable in the air is good, thermal endurance, chemically-resistant oxidizability and well electricity ization learn Yangization ?the characteristic such as reduction invertibity.Because it prepares easy, easy processing, feature that monomer is nontoxic, be considered to the electric conducting material that comparatively there is commercial value 21st century.So we intend the mode by being combined with Graphene by polypyrrole, are coated on LiFePO4 surface, utilize the physicochemical properties of polypyrrole and Graphene to improve high-rate discharge ability and the stable circulation performance of LiFePO4.
Summary of the invention
The present invention is directed to prior art above shortcomings, propose a kind ofly to apply the method that polypyrrole/graphene improves electrochemical performances of lithium iron phosphate, technique is simple, conjugation and uniformity good.
The present invention is achieved by the following technical solutions:
The present invention utilizes reacting without electric auto polymerization of pyrroles, graphene oxide is reduced into Graphene by azoles moiety, pyrroles is oxidized simultaneously aggregates into polypyrrole, thus realizes forming the polypyrrole/graphene composite bed with conductivity and corrosion resistance at the powder surface of LiFePO4.
Described without electric auto polymerization reaction by the treatment fluid of configuration containing graphene oxide, pyrroles, ammonium persulfate and water, fully react with LiFePO4 and be achieved, the mass ratio of graphene oxide in this treatment fluid, pyrroles, ammonium persulfate and water is 0.2 ~ 5 × 10
?4: 1 ~ 6 × 10
?3: 0.2 ~ 1 × 10
?5: 1.
The powder of described LiFePO4 and the mass ratio for the treatment of fluid are 0.01 ~ 0.2:1.
Described abundant reaction refers to: low whipping speed is stir 5 ~ 40min under the condition of 120 ~ 360 turns/min.
Described reacts without electric auto polymerization, is taken out by the powder of LiFePO4 and wash 2 ~ 3 times after being preferably stirring, and namely suction filtration forms polypyrrole/graphene composite bed on surface to being placed on vacuumize in the vacuum drying chamber of pressure little Yu ?0.08MPa without water droplet.
The present invention relates to the LiFePO4 with polypyrrole/graphene composite bed that said method prepares, there are graphene layer and spongy conductive materials in its surface, and has the dual shape characteristic that electronation Graphene and polypyrrole are oxidized auto polymerization.
The present invention relates to a kind of ferric phosphate lithium cell, comprise: both positive and negative polarity, barrier film and electrolyte, wherein: positive pole by N ?methyl pyrrolidone (NMP), the powder with the LiFePO4 of polypyrrole/graphene composite bed, conductive black and polyvinyladine floride (PVDF) form.
Described positive pole, with N ?methyl pyrrolidone (NMP) for solvent, to there is the mixing of the powder of the LiFePO4 of polypyrrole/graphene composite bed, conductive black and polyvinyladine floride (PVDF), be stirred into muddy be coated on aluminium foil surface and make after drying, wherein: the mass ratio with the powder of the LiFePO4 of polypyrrole/graphene composite bed, conductive black and polyvinyladine floride (PVDF) is preferably 80:10:10.
Described drying refers to vacuumize 12 hours.
Described negative pole adopts lithium metal.
Described barrier film, adopts capillary polypropylene (Celgard2300) film.
Described electrolyte, by lithium hexafluoro phosphate (LiPF
6)/ethylene carbonate (EC), diethyl carbonate (DEC), methyl ethyl ester (EMC) are mixed, and its component and content are preferably: 1mol/L LiPF
6/ EC, DEC, EMC are that 1:1:1 mixes with volume ratio.
Described battery is assembled and is obtained in the glove box being full of high-purity argon gas.
Technique effect
Compared with prior art, the present invention forms the polypyrrole/graphene composite bed of high conductivity and corrosion resistance in a treatment fluid in the powder surface of LiFePO4 through once-through operation, operating process and technique simple, without the need to adding organic solvent, surfactant, reducing agent and oxidant in composite bed generative process, production cost is low.Meanwhile, the electronation auto polymerization reaction attachment of atom level of the present invention, compared with simple mechanical mixture, has higher conjugation and homogeneity, thus can significantly improve multiplying power discharging property and the cyclical stability of LiFePO4.
Accompanying drawing explanation
Fig. 1 is the field emission scanning electron microscope figure of the powder of commodity carbon-covering lithium iron phosphate before and after process in the embodiment of the present invention 1;
In figure: (a) is the powder of untreated commodity carbon-covering lithium iron phosphate, (b) is the powder of the commodity carbon-covering lithium iron phosphate after polypyrrole/graphene compound base amount method.
Fig. 2 is the cycle performance curve of commodity carbon-covering lithium iron phosphate electrode before and after process in the embodiment of the present invention 1;
In figure: (a) is untreated iron phosphate lithium electrode, (b) is the iron phosphate lithium electrode after polypyrrole/graphene compound base amount method.
Fig. 3 is commodity carbon-covering lithium iron phosphate rate charge-discharge curve in process front and back in the embodiment of the present invention 1;
In figure: (a) is untreated iron phosphate lithium electrode, (b) is the iron phosphate lithium electrode after polypyrrole/graphene compound base amount method.
Embodiment
Elaborate to embodiments of the invention below, the present embodiment is implemented under premised on technical solution of the present invention, give detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
The present embodiment comprises the following steps: preparation 200mL is containing the mixed aqueous solution of graphene oxide 0.01g, pyrroles 1mL, ammonium persulfate 0.002g; In above-mentioned mixed solution, add the powder of 2g commodity carbon-covering lithium iron phosphate, low whipping speed is stir 8min under 180 turns/min condition; By the powder of above-mentioned reacted LiFePO4 through washing, suction filtration, Zhi Yu ?0.08MPa vacuum drying chamber in vacuumize.
As shown in Figure 1, compared with the powder (a) of untreated LiFePO4, there are obvious graphene layer and spongy conductive materials in powder (b) surface of the LiFePO4 after polypyrrole/graphene compound base amount method, has electronation Graphene and polypyrrole to be oxidized the dual shape characteristic of auto polymerization.
As shown in Figures 2 and 3, with N ?methyl pyrrolidone (NMP) for solvent, 80:10:10 in mass ratio, by the mixing of the powder of the LiFePO4 before and after process, conductive black and polyvinyladine floride (PVDF), be stirred into muddy and be coated on aluminium foil surface, then vacuumize 12 hours, the positive plate that diameter is 10mm made by compressing tablet.Using lithium metal as with reference to negative pole, with capillary polypropylene (Celgard2300) film for barrier film, with 1mol/L LiPF
6/ EC+DEC+EMC (volume ratio is 1:1:1) is electrolyte.In the glove box being full of high-purity argon gas, be assembled into CR2032 button cell.Leave standstill and carry out electrochemical property test after 12 hours.
Simulated battery adopts blue electric battery test system (LAND CT ?2001A) to carry out charge-discharge performance test.With different charge-discharge magnification (0.2,0.5,1,2,5 and 10C), in 2.5 ~ 4.2V voltage range, charge-discharge performance test is carried out to the LiFePO4 sample before and after process.Charge and discharge cycles test result shows: specific capacity during 0.2C and 10C discharge and recharge is about 170 and 97mAh/g respectively.
Embodiment 2
The present embodiment comprises the following steps: preparation 150mL is containing the mixed aqueous solution of graphene oxide 0.2g, pyrroles 0.5mL, ammonium persulfate 0.001g; In above-mentioned mixed solution, add the powder of 20g commodity carbon-covering lithium iron phosphate, low whipping speed is stir 60min under 120 turns/min condition; By the powder of above-mentioned reacted LiFePO4 through washing, suction filtration, Zhi Yu ?0.08MPa vacuum drying chamber in vacuumize.
Charge-discharge performance test is carried out to the LiFePO4 sample before and after process.Charge and discharge cycles test result shows: specific capacity during 0.2C and 10C discharge and recharge is about 165 and 92mAh/g respectively.
Embodiment 3
The present embodiment comprises the following steps: preparation 100mL is containing the mixed aqueous solution of graphene oxide 0.003g, pyrroles 2mL, ammonium persulfate 0.0005g; In above-mentioned mixed solution, add the powder of 1g commodity carbon-covering lithium iron phosphate, low whipping speed is stir 10min under 300 turns/min condition; By the powder of above-mentioned reacted LiFePO4 through washing, suction filtration, Zhi Yu ?0.08MPa vacuum drying chamber in vacuumize.
Charge-discharge performance test is carried out to the LiFePO4 sample before and after process.Charge and discharge cycles test result shows: specific capacity during 0.2C and 10C discharge and recharge is about 175 and 96mAh/g respectively.
Claims (9)
1. one kind has the preparation method of the LiFePO4 of polypyrrole/graphene composite bed, it is characterized in that, utilize reacting without electric auto polymerization of pyrroles, graphene oxide is reduced into Graphene by azoles moiety, pyrroles is oxidized simultaneously aggregates into polypyrrole, thus realizes forming the polypyrrole/graphene composite bed with conductivity and corrosion resistance at the powder surface of LiFePO4;
Described without electric auto polymerization reaction by the treatment fluid of configuration containing graphene oxide, pyrroles, ammonium persulfate and water, fully react with LiFePO4 and be achieved.
2. method according to claim 1, is characterized in that, described treatment fluid is made up of graphene oxide, pyrroles, ammonium persulfate and water, and its mass ratio is 0.2 ~ 5 × 10
?4: 1 ~ 6 × 10
?3: 0.2 ~ 1 × 10
?5: 1.
3. method according to claim 1, is characterized in that, the powder of described LiFePO4 and the mass ratio for the treatment of fluid are 0.01 ~ 0.2:1.
4. method according to claim 1, is characterized in that, described abundant reaction refers to: low whipping speed is stir 5 ~ 40min under the condition of 120 ~ 360 turns/min.
5. method according to claim 4, it is characterized in that, taken out by the powder of LiFePO4 after stirring and wash 2 ~ 3 times, namely suction filtration forms polypyrrole/graphene composite bed on surface to being placed on vacuumize in the vacuum drying chamber of pressure little Yu ?0.08MPa without water droplet.
6. one kind has the LiFePO4 of polypyrrole/graphene composite bed, it is characterized in that, prepared by method described in above-mentioned arbitrary claim, there are graphene layer and spongy conductive materials in its surface, and has the dual shape characteristic that electronation Graphene and polypyrrole are oxidized auto polymerization.
7. a ferric phosphate lithium cell, it is characterized in that, comprise: both positive and negative polarity, barrier film and electrolyte, wherein: positive pole by N ?methyl pyrrolidone, form according to the powder with the LiFePO4 of polypyrrole/graphene composite bed, conductive black and the polyvinyladine floride described in above-mentioned arbitrary claim.
8. ferric phosphate lithium cell according to claim 7, it is characterized in that, described positive pole, with N ?methyl pyrrolidone for solvent, to there is the mixing of the powder of the LiFePO4 of polypyrrole/graphene composite bed, conductive black and polyvinyladine floride, be stirred into muddy be coated on aluminium foil surface and make after drying, wherein: the mass ratio with the powder of the LiFePO4 of polypyrrole/graphene composite bed, conductive black and polyvinyladine floride is 80:10:10.
9. ferric phosphate lithium cell according to claim 7, is characterized in that, described electrolyte, is mixed by lithium hexafluoro phosphate/ethylene carbonate, diethyl carbonate, methyl ethyl ester, and its component and content are: 1mol/L LiPF
6/ EC, DEC, EMC are that 1:1:1 mixes with volume ratio.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105489884A (en) * | 2016-02-01 | 2016-04-13 | 上海交通大学 | Method for improving electrochemical performance of nickel-cobalt lithium manganate by chemically reducing oxidized graphene/magnesium |
| CN105562119A (en) * | 2015-12-22 | 2016-05-11 | 济宁学院 | Reduced graphene supported molybdenum or tungsten carbide catalyst and preparation method and application thereof |
| CN105633391A (en) * | 2016-02-03 | 2016-06-01 | 上海交通大学 | Preparation method of metal manganese/reduced-oxidized graphene/lithium iron phosphate composite material |
| CN109037658A (en) * | 2018-08-31 | 2018-12-18 | 重庆工商大学 | A kind of lithium iron phosphate positive material preparation method of polymer overmold |
| CN114477174A (en) * | 2020-11-12 | 2022-05-13 | 中国科学院大连化学物理研究所 | Composite carbon material, preparation thereof and application of composite carbon material in lead-carbon battery |
| CN114784249A (en) * | 2022-04-29 | 2022-07-22 | 楚能新能源股份有限公司 | Lithium iron phosphate composite positive electrode material and preparation method thereof |
| CN117238680A (en) * | 2023-11-10 | 2023-12-15 | 江西五十铃汽车有限公司 | Graphene oxide/polypyrrole composite electrode material and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101478039A (en) * | 2009-02-05 | 2009-07-08 | 上海交通大学 | Preparation for polypyrole coated lithium iron phosphate |
| CN103682274A (en) * | 2013-12-19 | 2014-03-26 | 浙江师范大学 | Graphene/polyaniline/sulfur composite material and preparation method thereof |
| CN104022283A (en) * | 2014-06-09 | 2014-09-03 | 上海交通大学 | Method for improving electrochemical characteristics of lithium iron phosphate by use of graphene/polyaniline |
| CN104600316A (en) * | 2015-01-07 | 2015-05-06 | 上海大学 | Sulfur/polymer/graphene ternary composite and preparation method thereof |
-
2015
- 2015-06-23 CN CN201510350773.7A patent/CN104966836A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101478039A (en) * | 2009-02-05 | 2009-07-08 | 上海交通大学 | Preparation for polypyrole coated lithium iron phosphate |
| CN103682274A (en) * | 2013-12-19 | 2014-03-26 | 浙江师范大学 | Graphene/polyaniline/sulfur composite material and preparation method thereof |
| CN104022283A (en) * | 2014-06-09 | 2014-09-03 | 上海交通大学 | Method for improving electrochemical characteristics of lithium iron phosphate by use of graphene/polyaniline |
| CN104600316A (en) * | 2015-01-07 | 2015-05-06 | 上海大学 | Sulfur/polymer/graphene ternary composite and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| IKER BOYANO ER AL.: ""Preparation of C-LiFePO4/polypyrrole lithium rechargeable cathode by consecutive potential steps electrodeposition"", 《JOURNAL OF POWER SOURCES》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105562119A (en) * | 2015-12-22 | 2016-05-11 | 济宁学院 | Reduced graphene supported molybdenum or tungsten carbide catalyst and preparation method and application thereof |
| CN105562119B (en) * | 2015-12-22 | 2017-12-26 | 济宁学院 | Reduced graphene loads molybdenum carbide or tungsten catalyst and its preparation method and application |
| CN105489884A (en) * | 2016-02-01 | 2016-04-13 | 上海交通大学 | Method for improving electrochemical performance of nickel-cobalt lithium manganate by chemically reducing oxidized graphene/magnesium |
| CN105489884B (en) * | 2016-02-01 | 2019-01-11 | 上海交通大学 | The method that electronation graphene oxide/magnesium improves nickle cobalt lithium manganate chemical property |
| CN105633391A (en) * | 2016-02-03 | 2016-06-01 | 上海交通大学 | Preparation method of metal manganese/reduced-oxidized graphene/lithium iron phosphate composite material |
| CN105633391B (en) * | 2016-02-03 | 2019-01-11 | 上海交通大学 | Manganese metal/redox graphene/composite ferric lithium phosphate material preparation method |
| CN109037658A (en) * | 2018-08-31 | 2018-12-18 | 重庆工商大学 | A kind of lithium iron phosphate positive material preparation method of polymer overmold |
| CN114477174A (en) * | 2020-11-12 | 2022-05-13 | 中国科学院大连化学物理研究所 | Composite carbon material, preparation thereof and application of composite carbon material in lead-carbon battery |
| CN114477174B (en) * | 2020-11-12 | 2023-11-21 | 中国科学院大连化学物理研究所 | Composite carbon material, preparation thereof and application thereof in lead-carbon battery |
| CN114784249A (en) * | 2022-04-29 | 2022-07-22 | 楚能新能源股份有限公司 | Lithium iron phosphate composite positive electrode material and preparation method thereof |
| CN117238680A (en) * | 2023-11-10 | 2023-12-15 | 江西五十铃汽车有限公司 | Graphene oxide/polypyrrole composite electrode material and preparation method and application thereof |
| CN117238680B (en) * | 2023-11-10 | 2024-04-09 | 江西五十铃汽车有限公司 | Graphene oxide/polypyrrole composite electrode material and preparation method and application thereof |
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Application publication date: 20151007 |