CN103199246B - A kind of two yuan of Compound C u2Se positive electrodes for sodium-ion battery and preparation method thereof - Google Patents
A kind of two yuan of Compound C u2Se positive electrodes for sodium-ion battery and preparation method thereof Download PDFInfo
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- CN103199246B CN103199246B CN201310087461.2A CN201310087461A CN103199246B CN 103199246 B CN103199246 B CN 103199246B CN 201310087461 A CN201310087461 A CN 201310087461A CN 103199246 B CN103199246 B CN 103199246B
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- sodium
- ion battery
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- electrode
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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 belongs to sodium-ion battery technical field, be specifically related to a kind of positive electrode for sodium-ion battery and preparation method thereof.This material copper mesh is placed in selenium steam selenium and copper reacts, at the uniform Cu of copper mesh Surface Creation one deck
2se, remaining copper is used as collector.This electrode is used in sodium-ion battery, and specific capacity reaches 253mAh/g first, and discharge platform is 1.93V vs. Na
+/ Na, specific energy can reach 488Wh/kg, and electrode capacity after 100 circulations still has 113.6mAh/g.Cu
2the electrochemical stability of Se is good, specific capacity is high, good cycle, preparation method simple, is applicable to sodium-ion battery.
Description
Technical field
The invention belongs to technical field of electrochemistry, being specifically related to a class for receiving the positive electrode and preparation method thereof of ion battery.
Background technology
The reserves that a large amount of uses due to traditional energies such as fossil fuels cause the non-renewable energy resources such as global environmental problem and climate change another aspect fossil fuel are also limited.Just seem so tap a new source of energy and be even more important, wind energy, solar energy, tidal energy etc. are owing to being subject to the impact of weather and qualifications and record of service position larger, just need itself and chemical power source to be combined to its effective utilization, the electrical power storage sent, in chemical power source, is flowing to user through electrical network.Large-scale energy storage needs a large amount of chemical power sources, commercial battery such as the lead acid accumulator of comparative maturity can cause very large environmental pollution owing to using heavy metal lead now, for lithium ion battery, if used on a large scale, be that lithium reserves are on earth limited on the one hand, the cost of lithium ion battery is very high on the other hand.And sodium-ion battery, mainly use sodium, sodium element reserves are on earth far longer than lithium, and price is also cheap than lithium.Sodium-ion battery will have great advantage as the battery of extensive stored energy application.Find Large Copacity, the sodium ion positive electrode of high-energy-density seems particularly urgent.
Summary of the invention
The object of the invention is to proposition one class sodium-ion battery positive material of good performance and preparation method thereof.
The anode material for lithium-ion batteries that the present invention proposes is a kind of Cu with face-centred cubic structure
2se material.Show after deliberation, this type of material has good chemical property, can be used as the positive electrode of high-performance sodium-ion battery.So far not about Cu
2se material is used as the report of sodium-ion battery positive material.
The Cu as sodium-ion battery positive material that the present invention proposes
2se is form of film, and the thickness of its thin-film material is 1.8-2.5 μm, and preferred thickness is 2 μm.
The present invention uses a kind of simple rear selenizing method to prepare Cu
2se positive electrode, does not need process further simultaneously and obtains the binder free that can directly use and the pole piece additionally adding conductive agent.Concrete steps are as follows:
Get a certain amount of selenium and be placed in reactor, then copper mesh is put in reactor, cover the lid of reactor, vacuumize with mechanical pump, to 1 × 10
-3below Pa; Heating reactor to 380--420 DEG C, and keeps 1.5-2.5 hours in this temperature; Be cooled to room temperature.
Film thickness can be measured by ESEM, and after selenizing, the weight of selenium is according to electronic balance weighing, and before and after experiment, substrate weight does poor obtaining, and copper selenide (Cu
2se) quality calculates according to stoichiometric proportion.
In the present invention, copper selenide (Cu
2se) crystal structure is measured by X-ray diffractometer.
In the present invention, copper selenide (Cu
2se) film can directly make sodium-ion battery membrane electrode.Electrochemical property test adopts the battery system be made up of two electrodes, wherein, and Cu
2se film is used as work electrode, and high pure sodium sheet is used as electrode and reference electrode.Electrolyte is 1M NaClO
4+ EC+DMC (V/V=1/1).Carry out in the drying box that battery is assemblied in applying argon gas.The charge-discharge test of battery carries out on blue electricity (Land) battery test system.
In the present invention, the copper selenide (Cu be made up of rear selenizing method
2se) electrode has good charge-discharge performance, and the discharge platform that first time discharge and recharge is reacted appears at 1.93V(relative to Na
+/ Na), the platform of each discharge process also appears at 1.93 V afterwards.Charging platform is 2.02V, and in each charging process afterwards, its platform also remains on 2.02V, copper selenide (Cu
2se) polarization of electrode is very little.After carrying out 100 circulations, its capacity still has 113.6mAh/g.Under the condition of 0.1C, capacity is the capacity still having 90.8mA/g under 251.4mAh/g, 2C condition.
Above-mentioned performance shows, copper selenide (Cu
2se) be the novel positive electrode of a class, can be applicable to sodium-ion battery.
Accompanying drawing explanation
Fig. 1 is copper selenide (Cu
2se) charging and discharging curve of electrode.
Embodiment
The invention is further illustrated by the following examples.
Get a certain amount of selenium to put in reactor, then copper mesh is put in reactor, cover the lid of reactor, vacuumize with mechanical pump, to 1 × 10
-3below Pa, heating reactor to 400 degree Celsius also keeps 400 DEG C of 2h, is cooled to room temperature.XRD diffraction pattern shows that the film prepared is Cu
2se.
Using obtained electrode as work electrode, become simulated battery using high pure sodium sheet as to electrode assembling.Wherein electrolyte is 1M NaClO
4+ EC+DMC (volume ratio of EC and DMC is 1/1), carries out in the drying box that battery is assemblied in applying argon gas.The discharge and recharge of battery is carried out on Land battery test system.Cu
2se membrane electrode shows good chemical property.Battery discharge platform is at about 1.9V, and capacity reaches about 253mAh/g (see figure 1).
Claims (2)
1. a method for preparing anode material for sodium-ion battery, is characterized in that concrete steps are: get a certain amount of selenium and be placed in reactor, then be put in reactor by copper mesh, cover the lid of reactor, vacuumize with mechanical pump, to 1 × 10
-3below Pa; Heating reactor to 380--420 DEG C, and keeps 1.5-2.5 hours; Be cooled to room temperature, obtain face-centred cubic Cu
2se material.
2. the sodium-ion battery positive material for preparing of preparation method as claimed in claim 1, is characterized in that for the face-centred cubic Cu of one
2se material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310087461.2A CN103199246B (en) | 2013-03-19 | 2013-03-19 | A kind of two yuan of Compound C u2Se positive electrodes for sodium-ion battery and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310087461.2A CN103199246B (en) | 2013-03-19 | 2013-03-19 | A kind of two yuan of Compound C u2Se positive electrodes for sodium-ion battery and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103199246A CN103199246A (en) | 2013-07-10 |
| CN103199246B true CN103199246B (en) | 2015-10-07 |
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ID=48721673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310087461.2A Expired - Fee Related CN103199246B (en) | 2013-03-19 | 2013-03-19 | A kind of two yuan of Compound C u2Se positive electrodes for sodium-ion battery and preparation method thereof |
Country Status (1)
| Country | Link |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102362385A (en) * | 2009-03-25 | 2012-02-22 | 住友化学株式会社 | Sodium ion battery |
-
2013
- 2013-03-19 CN CN201310087461.2A patent/CN103199246B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102362385A (en) * | 2009-03-25 | 2012-02-22 | 住友化学株式会社 | Sodium ion battery |
Non-Patent Citations (3)
| Title |
|---|
| 《Fabrication and Electrochemical Characterization of CopperSelenide Thin Films by Pulsed Laser Deposition》;Ming-Zhe Xue等;《Journal of The Electrochemical Society》;20061017;第153卷(第12期);第A2262-A2268页 * |
| 谢大,等.用磁控溅射和真空硒化退火方法制备高质量的铜铟硒多晶薄膜.《物理学报》.2002,第51卷(第6期),第1378页. * |
| 赵湘辉,等.《硒化方式对CuInSe2薄膜结构、成分和形貌的影响》.《真空科学与技术学报》.2012,第32卷(第2期),第141页. * |
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| CN103199246A (en) | 2013-07-10 |
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Granted publication date: 20151007 Termination date: 20180319 |