CN102244277A - Diamond-like carbon film anode material for lithium-air batteries and preparation method thereof - Google Patents
Diamond-like carbon film anode material for lithium-air batteries and preparation method thereof Download PDFInfo
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- CN102244277A CN102244277A CN2011101425429A CN201110142542A CN102244277A CN 102244277 A CN102244277 A CN 102244277A CN 2011101425429 A CN2011101425429 A CN 2011101425429A CN 201110142542 A CN201110142542 A CN 201110142542A CN 102244277 A CN102244277 A CN 102244277A
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- lithium
- diamond
- film
- carbon
- dlc
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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
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention relates to a lithium-air battery anode material and a preparation method thereof, belonging to the technical field of electrochemistry. The anode material is a diamond-like carbon (DLC) film material, and the thickness of the film is 0.1-1 mum. The film is prepared through an electron beam thermal evaporation method. An electrode made from the film has good charge-discharge cycle reversibility, and the reversible specific capacity is 2318 Ah/g. The DLC film anode material has the advantages of good chemical stability, high specific capacity, excellent cycle performance and simple preparation method and is applicable to lithium-air batteries.
Description
Technical field
The invention belongs to technical field of electrochemistry, be specifically related to a class and be used for diamond like carbon (DLC, diamond-like carbon) film positive electrode of the empty battery of lithium and preparation method thereof.
Background technology
The empty battery of lithium has great potential to become the accumulation power supply of following a new generation because energy density is very high.The empty battery of typical nonaqueous lithium comprises lithium anode, is dissolved in electrolyte that forms in the organic solvent and the O that is made up of the material with carbon element with high-specific surface area, catalyst and binding agent by lithium salts
2Breathe electrode (positive pole).At present the empty cell positive material of the lithium that generally adopts is a porous carbon materials, yet all there are obvious deficiency in its weight ratio capacity, cycle performance.In order further to improve the performance of the empty battery of lithium, people study, seek better novel positive electrode of performance.In addition, along with the miniaturization of microelectronic component, the empty hull cell of the lithium that an urgent demand exploitation is complementary therewith.
Summary of the invention
The objective of the invention is to empty cell positive material of lithium that proposes a class weight ratio capacity height, good cycle and preparation method thereof.
The empty cell positive material of the lithium that the present invention proposes is a kind of diamond like carbon (DLC) thin-film material.Show that after deliberation this type of material can be used as the positive electrode of the empty battery of high-performance lithium.So far not about the report of diamond like carbon (DLC) thin-film material as the empty cell positive material of lithium.
Diamond like carbon (DLC) material as the empty cell positive material of lithium that the present invention proposes is a form of film, and film thickness is 0.1 ~ 1 μ m.
The preparation method that the present invention's proposition is used for diamond like carbon (DLC) the film positive electrode of the empty battery of lithium adopts the electron beam evaporation method, and concrete steps are: graphite is deposited used target as electron beam evaporation.Target and substrate distance are 6～7cm, and vacuum degree is 10 in the evaporation cavity
-3～10
-4Pa, sedimentation time are 20 ~ 40 minutes.
Among the present invention, the crystal structure of diamond like carbon (DLC) material film is determined by transmission electron microscope (JEOL 2010).Selected area electron diffraction collection of illustrative plates (SAED) shows that the structure of matter of diamond like carbon (DLC) material film that is made by the electron beam evaporation method is that Nano diamond is dispersed in the amorphous carbon.
Among the present invention, diamond like carbon (DLC) material film can directly be made the empty battery thin film electrode of lithium.
Among the present invention, the electrochemical property test of diamond like carbon (DLC) material film electrode adopts the hull cell system that is made up of three electrodes.Wherein, diamond like carbon film is as work electrode, and the high purity lithium sheet is used separately as to electrode and reference electrode.Electrolyte is 1M LiClO
4+ EC+DMC (V/V=1/1).Hull cell is assemblied in the drying box of applying argon gas and carries out.The experiment that discharges and recharges of hull cell is carried out on blue electricity (Land) hull cell test macro.
Among the present invention, diamond like carbon (DLC) membrane electrode that is made on substrates such as silicon chip by the electron beam evaporation method has charge-discharge performance, at voltage range 2.0～4.5V and current density 20 μ A/cm
2The time, the platform of exoelectrical reaction appears at 2.67V(with respect to Li/Li
+), for the second time discharge process with the first time discharge process compare, discharge platform is promoted to 2.73V, capacity does not have obvious decay.The second later cyclic process of week has good invertibity.
Above-mentioned performance shows that diamond like carbon (DLC) thin-film material is a kind of novel positive electrode, can be applicable to the empty battery of lithium.
Description of drawings
Fig. 1 is embodiment 1
The SAED spectrogram of diamond like carbon (DLC) material film.
Fig. 2 is the charging and discharging curve of embodiment 1 diamond like carbon (DLC) material film.
Embodiment
Further specify the present invention below by embodiment.
Embodiment:When adopting the electron beam evaporation legal system to be equipped with diamond-like materials (DLC) film, graphite is deposited used target as electron beam evaporation.Target and substrate distance are 6～7cm, and vacuum degree is 10 in the evaporation cavity
-3～10
-4Pa, sedimentation time are 20 ~ 40 minutes.
SAED measures the structure of matter (accompanying drawing 1) of diamond like carbon (DLC) material film that shows deposition.
Electrochemical property test result to the diamond like carbon on the silicon chip (DLC) material film electrode is as follows:
Diamond like carbon (DLC) material film electrode can be at 20 μ A/cm
2Carry out charge and discharge cycles under the charge-discharge velocity.In voltage range 2.0-4.5V, discharge capacity can reach 2318mAh/g for the first time, and heap(ed) capacity is about 2730mAh/g.Charging and discharging curve is seen accompanying drawing 2.
Therefore, the diamond like carbon that deposits on silicon chip (DLC) material film can be used as the positive electrode of the empty hull cell of lithium.
Claims (2)
1. the empty cell positive material of a lithium, this is characterised in that and is a kind of diamond like carbon film thin-film material that film thickness is 0.1 ~ 1 μ m.
2. the preparation method of the empty cell positive material of lithium as claimed in claim 1 is characterized in that adopting the electron beam evaporation method, and concrete steps are: graphite is deposited used target as electron beam evaporation; Target and substrate distance are 6～7cm, and vacuum degree is 10 in the evaporation cavity
-3～10
-4Pa, sedimentation time are 20 ~ 40 minutes, promptly get required diamond like carbon film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101425429A CN102244277A (en) | 2011-05-30 | 2011-05-30 | Diamond-like carbon film anode material for lithium-air batteries and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101425429A CN102244277A (en) | 2011-05-30 | 2011-05-30 | Diamond-like carbon film anode material for lithium-air batteries and preparation method thereof |
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|---|---|
| CN102244277A true CN102244277A (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101425429A Pending CN102244277A (en) | 2011-05-30 | 2011-05-30 | Diamond-like carbon film anode material for lithium-air batteries and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054473A (en) * | 2017-12-26 | 2018-05-18 | 深圳先进技术研究院 | A kind of metal-air battery and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5624718A (en) * | 1995-03-03 | 1997-04-29 | Southwest Research Institue | Diamond-like carbon based electrocatalytic coating for fuel cell electrodes |
| JP3218062B2 (en) * | 1991-10-25 | 2001-10-15 | 並木精密宝石株式会社 | Method for producing diamond-like carbon film |
-
2011
- 2011-05-30 CN CN2011101425429A patent/CN102244277A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3218062B2 (en) * | 1991-10-25 | 2001-10-15 | 並木精密宝石株式会社 | Method for producing diamond-like carbon film |
| US5624718A (en) * | 1995-03-03 | 1997-04-29 | Southwest Research Institue | Diamond-like carbon based electrocatalytic coating for fuel cell electrodes |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054473A (en) * | 2017-12-26 | 2018-05-18 | 深圳先进技术研究院 | A kind of metal-air battery and preparation method thereof |
| CN108054473B (en) * | 2017-12-26 | 2024-04-09 | 深圳先进技术研究院 | Metal-air battery and preparation method thereof |
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Application publication date: 20111116 |