CN103700509A - Preparation method of solid-state sensitized battery - Google Patents
Preparation method of solid-state sensitized battery Download PDFInfo
- Publication number
- CN103700509A CN103700509A CN201310727259.1A CN201310727259A CN103700509A CN 103700509 A CN103700509 A CN 103700509A CN 201310727259 A CN201310727259 A CN 201310727259A CN 103700509 A CN103700509 A CN 103700509A
- Authority
- CN
- China
- Prior art keywords
- preparation
- nanofiber
- electrolyte
- battery
- tio
- 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.)
- Granted
Links
Images
Classifications
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
Landscapes
- Hybrid Cells (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to the technical field of solar batteries, in particular to a preparation method of a solid-state sensitized battery. The preparation method comprises a step of preparing TiO2 nanometer fibers, a step of preparing gel ion electrolyte, a step of treating FTO and preparing a photo anode and a step of sensitizing the photo anode, treating the electrolyte and assembling batteries. The preparation method has the beneficial effects that 1, by adopting an electrospinning technology, nanometer fibers with large specific surface area and large length-diameter ratio can be obtained, and the absorption of dyes is facilitated; 2, by adopting an ALD technology for preparing a titanium oxide layer, the collection for battery cells can be improved, and the composition of the electrolyte and the FTO can be obstructed; 3, the sensitized nanometer fibers are directly packaged after being soaked in the gel electrolyte, so that the packaging process is simple.
Description
Technical field
The present invention relates to technical field of solar batteries, refer in particular to a kind of preparation method of solid-state sensitization battery, be applied to DSSC.
Background technology
Energy and environment problem has now become the focus that the whole world is paid close attention to, and that solar energy has is clean, it is safe, inexhaustible to use, utilize cost low and be not subject to the plurality of advantages such as geographical conditions restriction, is the desirable energy that solves the energy and environmental problem; DSSC is a kind of novel solar battery getting up based on Nano-technology Development, has that cost of manufacture is low, production technology is simple, pollution-free, good light stability, is a kind of environment protection solar cell.
DSSC (DSSC) is mainly by transparent conduction base sheet, porous nano crystallized semiconductor thin film, electrolyte solution with electrode is formed; How to make DSSC obtain higher photoelectric conversion efficiency, improve the stability of battery, increase the service life is the hot issue of research always, development along with nanometer technology, novel nano material with its good performance applications in DSSC, monodimension nanometer material (as nano wire, nanotube etc.) has good electron-transporting, can make fast electronics separated with hole, suppresses the generation of dark current; And electrostatic spinning technique can be prepared one-dimensional nano structure material, have that specific area is large, aperture size is little, draw ratio is high, porosity advantages of higher, and technique is simple, cost is low.
Liquid electrolyte is owing to having high conductivity, ion diffusion velocity is fast, the advantages such as porous electrode good penetrability are widely studied, but the shortcomings such as desorption that this type of organic solvent liquid electrolyte exists volatile, difficult encapsulation, poor stability, has certain toxicity and can cause dyestuff; And ionic liquid electrolyte has " zero " vapour pressure, electrochemical window is wide, heat-resistant stability is high, conductivity advantages of higher, can effectively solve the shortcoming such as volatile, poor stability of organic solvent.
Summary of the invention
The object of the invention is to: for liquid electrolyte, exist to be difficult for the defects such as encapsulation, high temperature are unstable, easy leakage, a kind of preparation method of solid-state sensitization battery is provided, and the method has packaging technology is simple, packaging cost is cheap, can improve DSSC stability, extending battery life etc.
To achieve the above object, the present invention adopts following technical scheme: a kind of preparation method of solid-state sensitization battery, comprises the following steps:
The first step: TiO
2the preparation of nanofiber: a certain amount of polyvinylpyrrolidone, butyl titanate, glacial acetic acid and absolute ethyl alcohol stir, after standing 1～2h, prepares nanofiber, and calcining at a certain temperature obtains TiO
2nanofiber.
Second step: the preparation of gel ion electrolyte: a certain amount of 1-methyl-3-propyl imidazole iodized salt, iodine, two fluoroform sulfimide lithium, 4-tert .-butylpyridine and poly ion liquid stir 4～8h at a certain temperature, it is mixed, obtain il electrolyte.
The preparation of the processing of the 3rd step: FTO and light anode: by ALD technology at the certain thickness titanium oxide of FTO deposition on glass, then by TiO
2nanofiber is placed in FTO glass surface, TiO
2the Area Ratio of nanofiber and FTO glass is 1:8, drips solution, makes it have certain adhesiveness.
The 4th step: the assembling of the sensitization of light anode, electrolyte processing and battery.
The described method first step, is 2:5:10:40 according to mass ratio, by polyvinylpyrrolidone: butyl titanate: glacial acetic acid: absolute ethyl alcohol mixes, stirs 2～4h, and standing 1～2h forms homogeneous, transparent and have a spinning solution of certain viscosity; The method of preparing nanofiber is method of electrostatic spinning, and nozzle diameter is 0.6mm, and operating voltage is 10～20kV; Syringe needle nozzle is 10～15cm to the curing distance of accepting screen; Indoor temperature is 10～15
oc, relative humidity is 25～45%, the calcining heat of nanofiber is at 500～700 ℃.
Described method second step, takes 1-methyl-3-propyl imidazole iodized salt (PMII) of 1～2 M, the iodine (I of 0.1～0.3 M according to volume ratio 6:6:7:6
2), the two fluoroform sulfimide lithiums (LITFSI) of 0.2～0.4 M, 0.5～0.7 M 4-tert .-butylpyridine (TBP), add again the poly ion liquid ([PBVIm] [TFSI]) of 20～30 wt% of above-mentioned substance gross mass in container, at 60～70 ℃, stir 6～10h, it is mixed, obtain the gel poly ion liquid electrolyte of certain denseness.
Described method the 3rd step, the thickness of titanium oxide layer prepared by ALD technology is 2-5nm, the ethanol solution that dropping solution is butyl titanate, the volume ratio of butyl titanate and absolute ethyl alcohol is 1:10.
Described method the 4th step, sensitizing dyestuff includes but not limited to N719, and electrolyte processing method is for injecting or soaking, and encapsulating film is PTFTO or PET, makes light anode and electrode is combined.
1), electrostatic spinning technique can prepare the nanofiber that specific area is large, draw ratio is high, is conducive to the absorption of dyestuff beneficial effect of the present invention is:; 2), ALD technology prepares the collection that titanium oxide layer can improve on the one hand battery electron, can hinder the compound of electrolyte and FTO simultaneously; 3) nanofiber after sensitization directly encapsulates after being immersed in gel electrolyte, and packaging technology is simple.
Accompanying drawing explanation
Fig. 1 is TiO in example one of the present invention
2the scanning electron microscope (SEM) photograph of nanofiber, as can be seen from Figure nanofiber surface smoother;
Fig. 2 is TiO in example one of the present invention
2nanofiber 500
oxRD figure after C calcining, can find out TiO in figure
2110 principal character peaks of Anatase;
Fig. 3 is with butyl titanate solution-treated TiO in example one of the present invention
2the adhering sectional view of nanofiber and FTO electro-conductive glass, as can be seen from the figure TiO
2nanofiber and FTO have good adhesiveness;
Fig. 4 is the picture of putting upside down of gel ionomer synthetic in example two of the present invention, and as can be seen from the figure gel ionomer has good viscosity;
Fig. 5 is the I-V curve chart of the sensitization battery in example of the present invention, in figure, can find out in example three, by ALD method, prepare titanium oxide layer and the sensitization battery prepared than other of the sensitization battery performance prepared of gel ionomer electrolyte be significantly improved.
Embodiment
Below in conjunction with example, further illustrate content of the present invention:
Example one: the TiO of liquid electrolyte
2the preparation of the sensitization battery of nanofiber.
1, TiO
2the preparation of nanofiber:
According to mass ratio, be 2:5:10:40, take 1g polyvinylpyrrolidone (PVP) in the beaker of 100ml, add the butyl titanate of 2.5ml, 5ml glacial acetic acid, 20ml absolute ethyl alcohol, stirs 3h under room temperature, standing 1h, obtains homogeneous, transparent and have a spinning solution of certain viscosity; The spinning solution configuring is added in the existing electrostatic spinning apparatus of device for spinning, carry out electrostatic spinning, nozzle diameter is 0.6mm, and operating voltage is 15kV; Syringe needle nozzle is 13cm to the curing distance of accepting screen; Indoor temperature is 15
oc, relative humidity is 45%, obtains PVP/TiO
2composite nano fiber; By prepared PVP/TiO
2composite nano fiber is put in temperature programmed control stove and heat-treats, and heating rate is 1
oc/min, 500
oc constant temperature 2h, rate of temperature fall is 1
oc/min, cools to 200
oduring C, be naturally down to room temperature, obtain TiO
2nanofiber.
2, TiO
2the processing of nanofiber light anode
By the TiO preparing
2nanofiber cutting area is 0.5 * 0.5cm
2, the butyl titanate of 2ml and 20ml absolute ethyl alcohol are configured to the ethanol solution of butyl titanate, drip at TiO
2nanofiber and FTO are upper, make it have good adhesiveness.
3, the sensitization of electrode and battery assembling
In N719 dye solution, soak 24h, make light anode, take Pt electrode as to electrode, take PET as heat-seal film, be heated to 150
oc is assembled into solar cell, and the electrolyte of injection is for containing 0.5M LiI, 0.05M I
2acetonitrile solution with 0.5M TBP (4-tert-butylpyridine).
Example two: the TiO of gel ionomer electrolyte
2the preparation of the sensitization battery of nanofiber
2, TiO
2the preparation of nanofiber
With TiO in example one
2the preparation of nanofiber.
2, TiO
2the processing of nanofiber light anode
With TiO in example one
2the preparation of nanofiber light anode.
3, the preparation of gel ionomer electrolyte
According to volume ratio 6:6:7:6, take 1M 1-methyl-3-propyl imidazole iodized salt (PMII), 0.1M iodine (I
2), the two fluoroform sulfimide lithiums (LITFSI) of 0.2M, 0.5M 4-tert .-butylpyridine (TBP), 25wt% poly ion liquid ([PBVIm] [TFSI]) is in 100ml round-bottomed flask, at 60 ℃, stir 8h, it is mixed, obtain the gel poly ion liquid electrolyte of certain denseness.
4, the sensitization of electrode and battery assembling
In N719 dye solution, soak 24h, be then positioned in the gel poly ion liquid electrolyte preparing and soak 15min, it is fully absorbed, take Pt electrode as to electrode, take PET as heat-seal film, be heated to 150
oc is assembled into solar cell.
Example three: ALD processes the TiO of FTO, gel ionomer electrolyte
2the preparation of the sensitization battery of nanofiber
1, TiO
2the preparation of nanofiber
With TiO in example one
2the preparation of nanofiber.
2, the preparation of gel ionomer electrolyte
Preparation with gel ionomer electrolyte in example two.
3, ALD method is processed FTO electro-conductive glass
By ALD method, at cleaned FTO conductive glass surface, prepare the titanium oxide layer that a layer thickness is 5nm.
4, TiO
2the processing of nanofiber light anode
By the TiO preparing
2nanofiber cutting area is 0.5 * 0.5cm
2, the butyl titanate of 2ml and 20ml absolute ethyl alcohol are configured to the ethanol solution of butyl titanate, drip at TiO
2fTO after nanofiber and ALD method are processed is upper, makes it have good adhesiveness.
5, the sensitization of electrode and battery assembling
Sensitization and battery assembling with electrode in example two.
Implementation result: finally carry out the performance test of battery, at AM1.5,100mW/cm
2under the irradiation of etalon optical power, TiO in example one
2the open circuit voltage of nanofiber sensitization solar battery sample is 0.815V, and short circuit current is 7.16mA, and fill factor, curve factor is 0.53, and photoelectric conversion efficiency is 3.14%, and test data as shown in Figure 5; In figure, provided the test result of battery in example two and example three, in example two, the short circuit current of battery is 10.4mA simultaneously, and fill factor, curve factor is 0.738, and photoelectric conversion efficiency is 5.64%; In example three, the short circuit current of battery is 11.1mA, and fill factor, curve factor is 0.765, and photoelectric conversion efficiency is 6.10%.From experimental result can find out by ALD method, prepare titanium oxide layer and the sensitization battery prepared than other of the sensitization battery performance prepared of gel ionomer electrolyte be significantly improved, gel state electrolyte easily encapsulates, can not reveal.
Claims (5)
1. a preparation method for solid-state sensitization battery, is characterized in that comprising the following steps:
(1) TiO
2the preparation of nanofiber: a certain amount of polyvinylpyrrolidone, butyl titanate, glacial acetic acid and absolute ethyl alcohol stir, after standing 1～2h, prepares nanofiber, and calcining at a certain temperature obtains TiO
2nanofiber;
(2) preparation of gel ion electrolyte: a certain amount of 1-methyl-3-propyl imidazole iodized salt, iodine, two fluoroform sulfimide lithium, 4-tert .-butylpyridine and poly ion liquid stir 4～8h at a certain temperature, it is mixed, obtain il electrolyte;
(3) preparation of the processing of FTO and light anode: by ALD technology at the certain thickness titanium oxide of FTO deposition on glass, then by TiO
2nanofiber is placed in FTO glass surface, TiO
2the Area Ratio of nanofiber and FTO glass is 1:8, drips solution, makes it have certain adhesiveness;
(4) assembling of the sensitization of light anode, electrolyte processing and battery.
2. the preparation method of a kind of solid-state sensitization battery as claimed in claim 1, it is characterized in that: described step 1, according to mass ratio, be 2:5:10:40, by polyvinylpyrrolidone: butyl titanate: glacial acetic acid: absolute ethyl alcohol mixes, stir 2～4h, standing 1～2h, forms homogeneous, transparent and have a spinning solution of certain viscosity; The method of preparing nanofiber is method of electrostatic spinning, and nozzle diameter is 0.6mm, and operating voltage is 10～20kV; Syringe needle nozzle is 10～15cm to the curing distance of accepting screen; Indoor temperature is 10～15
oc, relative humidity is 25～45%, the calcining heat of nanofiber is at 500～700 ℃.
3. the preparation method of a kind of solid-state sensitization battery as claimed in claim 1, is characterized in that: described step 2, takes 1-methyl-3-propyl imidazole iodized salt (PMII) of 1～2 M, the iodine (I of 0.1～0.3 M according to volume ratio 6:6:7:6
2), the two fluoroform sulfimide lithiums (LITFSI) of 0.2～0.4 M, 0.5～0.7 M 4-tert .-butylpyridine (TBP), add again the poly ion liquid ([PBVIm] [TFSI]) of 20～30 wt% of above-mentioned substance gross mass in container, at 60～70 ℃, stir 6～10h, it is mixed, obtain the gel poly ion liquid electrolyte of certain denseness.
4. the preparation method of a kind of solid-state sensitization battery as claimed in claim 1, it is characterized in that: described step 3, the thickness of titanium oxide layer prepared by ALD technology is 2-5nm, the ethanol solution that dropping solution is butyl titanate, and the volume ratio of butyl titanate and absolute ethyl alcohol is 1:10.
5. the preparation method of a kind of solid-state sensitization battery as claimed in claim 1, it is characterized in that: described step 4, sensitizing dyestuff includes but not limited to N719, electrolyte processing method is for injecting or soaking, encapsulating film is PTFTO or PET, makes light anode and electrode is combined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310727259.1A CN103700509B (en) | 2013-12-26 | 2013-12-26 | Preparation method of solid-state sensitized battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310727259.1A CN103700509B (en) | 2013-12-26 | 2013-12-26 | Preparation method of solid-state sensitized battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103700509A true CN103700509A (en) | 2014-04-02 |
| CN103700509B CN103700509B (en) | 2017-02-08 |
Family
ID=50362003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310727259.1A Active CN103700509B (en) | 2013-12-26 | 2013-12-26 | Preparation method of solid-state sensitized battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103700509B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105023758A (en) * | 2015-07-13 | 2015-11-04 | 复旦大学 | Ionic liquid gel electrolyte used for dye-sensitized solar cell and preparation method |
| CN105280389A (en) * | 2015-10-16 | 2016-01-27 | 湖北大学 | Preparation method for dye-sensitized solar cell |
| CN105788869A (en) * | 2016-03-02 | 2016-07-20 | 常州大学 | Preparation method for ultrathin quasi-solid dye sensitized cell |
| CN106592197A (en) * | 2016-12-20 | 2017-04-26 | 大连交通大学 | Preparation method of multifunctional electrostatic spinning luminescent fiber with core-shell structure |
| CN108649200A (en) * | 2018-05-08 | 2018-10-12 | 宁波大学 | A kind of LaTi21O38·CoTiO3·Mn3O4The preparation method of compound nano wire |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546655A (en) * | 2009-01-15 | 2009-09-30 | 湘潭大学 | Quasi-solid dye sensitized flexible solar cell battery and its preparation method |
| CN101901692A (en) * | 2010-04-21 | 2010-12-01 | 苏州大学 | Solar cell gel electrolyte and preparation method and application thereof |
| CN102832051A (en) * | 2012-10-07 | 2012-12-19 | 复旦大学 | Preparation method for photoanode of dye-sensitized solar battery |
-
2013
- 2013-12-26 CN CN201310727259.1A patent/CN103700509B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546655A (en) * | 2009-01-15 | 2009-09-30 | 湘潭大学 | Quasi-solid dye sensitized flexible solar cell battery and its preparation method |
| CN101901692A (en) * | 2010-04-21 | 2010-12-01 | 苏州大学 | Solar cell gel electrolyte and preparation method and application thereof |
| CN102832051A (en) * | 2012-10-07 | 2012-12-19 | 复旦大学 | Preparation method for photoanode of dye-sensitized solar battery |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105023758A (en) * | 2015-07-13 | 2015-11-04 | 复旦大学 | Ionic liquid gel electrolyte used for dye-sensitized solar cell and preparation method |
| CN105280389A (en) * | 2015-10-16 | 2016-01-27 | 湖北大学 | Preparation method for dye-sensitized solar cell |
| CN105788869A (en) * | 2016-03-02 | 2016-07-20 | 常州大学 | Preparation method for ultrathin quasi-solid dye sensitized cell |
| CN105788869B (en) * | 2016-03-02 | 2019-11-12 | 常州大学 | A kind of preparation method of ultra-thin quasi- solid-state sensitized cells |
| CN106592197A (en) * | 2016-12-20 | 2017-04-26 | 大连交通大学 | Preparation method of multifunctional electrostatic spinning luminescent fiber with core-shell structure |
| CN106592197B (en) * | 2016-12-20 | 2019-05-28 | 大连交通大学 | A kind of preparation method of the Multifunctional static electricity spinning luminescent fibre with core-shell structure |
| CN108649200A (en) * | 2018-05-08 | 2018-10-12 | 宁波大学 | A kind of LaTi21O38·CoTiO3·Mn3O4The preparation method of compound nano wire |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103700509B (en) | 2017-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Bella et al. | Interfacial effects in solid–liquid electrolytes for improved stability and performance of dye-sensitized solar cells | |
| Priya et al. | High-performance quasi-solid-state dye-sensitized solar cell based on an electrospun PVdF− HFP membrane electrolyte | |
| Lv et al. | Large size, high efficiency fiber-shaped dye-sensitized solar cells | |
| Huo et al. | Nanocomposite gel electrolyte with large enhanced charge transport properties of an I3−/I− redox couple for quasi-solid-state dye-sensitized solar cells | |
| JP5675636B2 (en) | Glass sealing method for dye-sensitized solar cell | |
| KR20090010632A (en) | Photo electrodes equipped hollow sphere metal oxide nanoparticle for dye-sensitized photovoltaic cell and method for preparing the same | |
| JP2009032547A (en) | Dye-sensitized photoelectric conversion element, its manufacturing method, electronic equipment, semiconductor electrode, and its manufacturing method | |
| JP2008218394A (en) | Dye-sensitized solar cell and method of manufacturing the same | |
| Li et al. | Organic ionic plastic crystal-based electrolytes for solid-state dye-sensitized solar cells | |
| CN103700509B (en) | Preparation method of solid-state sensitized battery | |
| Dissanayake et al. | Efficiency enhancement in dye sensitized solar cells based on PAN gel electrolyte with Pr 4 NI+ MgI 2 binary iodide salt mixture | |
| Chen et al. | New fabrication process of long-life dye-sensitized solar cells by in situ gelation of quasi-solid polymer electrolytes | |
| TWI449236B (en) | Gel type electrolyte, method of fabrication thereof and dye-sensitized solar cell using the same | |
| JP2012204275A (en) | Method for manufacturing dye-sensitized solar cell, dye-sensitized solar cell, and dye-sensitized solar cell module | |
| KR101172361B1 (en) | Manufacturing method of photo electrode for dye-sensitized solar cell | |
| Rong et al. | Monolithic all-solid-state dye-sensitized solar cells | |
| Park et al. | Fabrication of hole-patterned TiO2 photoelectrodes for solid-state dye-sensitized solar cells | |
| KR101532421B1 (en) | Quasi-solid electrolyte for dye-sensitized solar cell and dye-sensitized solar cell containing the electrolyte | |
| KR101131055B1 (en) | Dye sensitized solar cell comprising counter electrode having mesoporous carbon electrode deposited on transparent substrate and preparation method thereof | |
| CN105390294B (en) | A kind of quasi-solid electrolyte used for solar batteries based on Bis-imidazole ionic crystal | |
| WO2011118197A1 (en) | Photoelectric conversion element, light sensor and solar cell | |
| Wang et al. | Quasi-solid-state dye-sensitized solar cell based on gel electrolyte with high gel to solution transition temperature using low molecular mass organogelator | |
| KR20110025573A (en) | Dye sensitized solar cell comprising negative electrode including nano oxide layer adsorbed with dye and polyatomic anion and preparation method thereof | |
| KR101006078B1 (en) | Dye sensitized solar cells using solid-state nanocomposite electrolytes | |
| Wang et al. | Effect of the self-assembled gel network formed from a low molecular mass organogelator on the electron kinetics in quasi-solid-state dye-sensitized solar cells |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201113 Address after: No.8, wisdom Avenue, Donghu scenic area, Dayu Town, Rudong County, Nantong City, Jiangsu Province, 226400 Patentee after: Nantong Donghu International Travel Agency Co., Ltd Address before: Gehu Lake Road Wujin District 213164 Jiangsu city of Changzhou province No. 1 Patentee before: CHANGZHOU University |
|
| TR01 | Transfer of patent right |