CN109545571A - A kind of preparation method of hollow tubular self-supporting super capacitor electrode material - Google Patents

A kind of preparation method of hollow tubular self-supporting super capacitor electrode material Download PDF

Info

Publication number
CN109545571A
CN109545571A CN201811442133.9A CN201811442133A CN109545571A CN 109545571 A CN109545571 A CN 109545571A CN 201811442133 A CN201811442133 A CN 201811442133A CN 109545571 A CN109545571 A CN 109545571A
Authority
CN
China
Prior art keywords
electrode material
foam copper
hollow tubular
preparation
super capacitor
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.)
Pending
Application number
CN201811442133.9A
Other languages
Chinese (zh)
Inventor
王超
何欣芮
姜晶
胡娅林
田瀚卿
牛夷
范家豪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
University of Electronic Science and Technology of China
Original Assignee
University of Electronic Science and Technology of China
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by University of Electronic Science and Technology of China filed Critical University of Electronic Science and Technology of China
Priority to CN201811442133.9A priority Critical patent/CN109545571A/en
Publication of CN109545571A publication Critical patent/CN109545571A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22Electrodes
    • H01G11/24Electrodes characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22Electrodes
    • H01G11/26Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22Electrodes
    • H01G11/30Electrodes characterised by their material
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/66Current collectors
    • H01G11/68Current collectors characterised by their material
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/66Current collectors
    • H01G11/70Current collectors characterised by their structure
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/84Processes for the manufacture of hybrid or EDL capacitors, or components thereof
    • H01G11/86Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/13Energy storage using capacitors

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Abstract

A kind of preparation method of hollow tubular self-supporting super capacitor electrode material of the disclosure of the invention, belongs to electrode material for super capacitor preparation technical field, and in particular to a kind of using foam copper as the preparation of the hollow tubular self-supporting material of substrate.It is applied in supercapacitor by the self-supporting electrode material of substrate of foam copper, since active material to be deposited directly in conductive substrates, produces efficient ion/electron-transport path, reduce the contact resistance between conductive substrates and active material.It eliminates adhesive and conductive agent during manufacturing electrode material simultaneously to use, to optimize the preparation process of electrode material.The present invention provides one kind directly to grow one layer of Kocide SD on foam copper, vulcanizes Cu/Cu (OH) followed by hydro-thermal method2, the cuprous sulfide Cu@Cu of one layer of hollow tubular has finally been grown on foam copper surface2S electrode material for super capacitor, the material show excellent chemical property.

Description

A kind of preparation method of hollow tubular self-supporting super capacitor electrode material
Technical field
The invention belongs to electrode material for super capacitor preparation technical fields, and in particular to a kind of using foam copper as substrate The preparation of hollow tubular self-supporting material.
Background technique
In supercapacitor field, rarely has people's research by the self-supporting material of substrate of foam copper, foam copper and tradition are steeped Foam nickel substrate, which compares, has the advantage that (1) has higher electric conductivity and ductility, and (2) preparation cost is lower.With foam Copper is that the self-supporting electrode material of substrate applies in supercapacitor, since active material is deposited directly to conductive substrates On, efficient ion/electron-transport path is produced, the contact resistance between conductive substrates and active material is reduced.Simultaneously It eliminates adhesive and conductive agent during manufacturing electrode material to use, to optimize the preparation process of electrode material.This Invention then provides one kind and directly grows one layer of Kocide SD on foam copper, vulcanizes Cu/Cu followed by hydro-thermal method (OH)2, the cuprous sulfide Cu@Cu of one layer of hollow tubular has finally been grown on foam copper surface2S electrode of super capacitor material Material, the Cu@Cu of hollow tubular2S has bigger specific surface area, provides more for faraday's redox reaction of material Reactivity site, therefore there is better chemical property.
Summary of the invention
Technical solution of the present invention is mainly simplified positive electrode preparation process and raising electrode material chemical property And proposing a kind of foam copper is the preparation of the hollow tubular self-supporting super capacitor electrode material with special appearance of substrate Method.
Technical solution of the present invention is a kind of preparation method of hollow tubular self-supporting super capacitor electrode material, this method Include:
Step 1: the pretreatment of foam copper;
By foam copper with concentration be 1-2mol/L dilute hydrochloric acid processing 30-60min, then with acetone soln be ultrasonically treated 30- It is dry to be finally transferred into vacuum oven by 60min;
Step 2: synthesis Cu/Cu (OH)2
By NaOH and (NH4)2S2O8It is dissolved in deionized water respectively, by the deionized water solution of NaOH and (NH4)2S2O8's Deionized water solution after mixing evenly, mixes rapidly respectively, makes mixed solution NaOH and (NH4)2S2O8Molal weight ratio For 2:1;Then the foam copper that pretreatment obtains is soaked in stand in solution and is reacted;Last deionized water repeated flushing is transferred to Dry 10-12h in 20-40 DEG C of vacuum oven;
Step 3: synthesis Cu@Cu2S;
By the obtained Cu/Cu of step 2 (OH)2It is put into polytetrafluoroethylcontainer container, the thioacetamide of 1mol/L is added As solvent, 100-120 DEG C of reaction 3-7h in reaction kettle;It is dry to after the reaction was completed, be transferred to vacuum oven;
Step 4: the dry hollow tubular Cu@Cu completed2Electrode material of the S as supercapacitor carries out electrochemistry It can test.
A process for preparing the electrodes come, due to being that the material of growth in situ out, preparation process are more excellent on foam copper In traditional cladding process;Foam copper has better electric conductivity and ductility compared to nickel foam simultaneously, and the cost of preparation is also low In nickel foam;The Cu@Cu of hollow tubular2S has bigger specific surface area, provides for faraday's redox reaction of material More reactivity sites, therefore there is better chemical property;
It is applied in supercapacitor by the self-supporting electrode material of substrate of foam copper, since active material is directly heavy Product produces efficient ion/electron-transport path, reduces connecing between conductive substrates and active material in conductive substrates Electric shock resistance.It eliminates adhesive and conductive agent during manufacturing electrode material simultaneously to use, to optimize electrode material Preparation process.The present invention provides one kind directly to grow one layer of Kocide SD on foam copper, followed by hydro-thermal method sulphur Change Cu/Cu (OH)2, the cuprous sulfide Cu@Cu of one layer of hollow tubular has finally been grown on foam copper surface2S supercapacitor Electrode material, the material show excellent chemical property.
Detailed description of the invention
Fig. 1 is Cu@Cu2S electrode material production flow diagram;
Fig. 2 is Cu@Cu2The XRD diagram of S electrode material, it is known that this Success in Experiment is prepared for self-supporting electrode of super capacitor Material, diffraction maximum match well with standard card PDF#83-1462;
Fig. 3 is Cu@Cu2The SEM of S material difference enlargement ratio schemes, it is known that self-supporting material shows three-dimensional and is arranged alternately Hollow tubular structure, tube length is about at 3 μm;
Fig. 4 is Cu@Cu2CV at S material is respectively 100,110,120 DEG C in vulcanization time schemes, and material is in 5mV s-1's Specific capacity under scanning speed is respectively 2.76,3.68,2.37F cm-2
Fig. 5 is Cu@Cu2EIS at S material is respectively 100,110,120 DEG C in vulcanization time schemes, equivalent series resistance point It Wei not 2.22,1.98,4.46 Ω.
Specific embodiment
Prepare the detailed process of electrode material for super capacitor:
Example 1
Step (1) pretreatment of foam copper: will buy resulting foam copper and be cut to area 1cm*1cm size.It is soaked in It is ultrasonically treated 30-60min respectively in the dilute hydrochloric acid solution and acetone soln that concentration is 1-2mol/L, at above-mentioned two step Reason, gets rid of the impurity on foam copper surface, then to be transferred into 20 DEG C of vacuum oven dry 6h stand-by.
Step (2), Cu/Cu (OH)2Synthesis: weigh molal weight than the NaOH and (NH for 2:14)2S2O8It is dissolved in respectively It is stirred in 25ml deionized water.After being stirred evenly respectively to the two, it is mixed rapidly, then step (1) pretreatment is obtained Foam copper be soaked in above-mentioned solution stand reaction 1h.A large amount of deionized water repeated flushing are used after complete reaction, then are turned It is stand-by to move to 40 DEG C of vacuum oven dry 6h.
Step (3), Cu@Cu2The synthesis of S: by step (2) obtained Cu/Cu (OH)2It is put into polytetrafluoroethyllining lining, Take 1mol/L thioacetyl amine aqueous solution as solvent, 100 DEG C of reaction 3-7h of hydro-thermal in reaction kettle.Obtained material after the reaction was completed Expect 60-80 DEG C of vacuum dry 1-2h again, obtains the self-supporting Cu@Cu of hollow tubular2S material.
Step (4), by the obtained Cu@Cu of step (3)2S is as working electrode, and platinized platinum is used as to electrode, and Hg/HgO makees Electrochemical property test is carried out on electrochemical operation platform for reference electrode.
Example 1 is 100 DEG C of obtained electrode material for super capacitor Cu@Cu by curing temperature2S is in current density 5mVs-1Current density under by CV figure measure area specific capacity be 2.76F cm-2, equivalent series resistance is 2.22 Ω.
Example 2
Step (1) pretreatment of foam copper: will buy resulting foam copper and be cut to area 1cm*1cm size.It is soaked in It is ultrasonically treated 30-60min respectively in the dilute hydrochloric acid solution and acetone soln that concentration is 1-2mol/L, at above-mentioned two step Reason, gets rid of the impurity on foam copper surface, then to be transferred into 20-40 DEG C of vacuum oven dry 6-8h stand-by.
Step (2), Cu/Cu (OH)2Synthesis: weigh molal weight than the NaOH and (NH for 2:14)2S2O8It is dissolved in respectively It is stirred in 25ml deionized water.After being stirred evenly respectively to the two, it is mixed rapidly, then step (1) pretreatment is obtained Foam copper be soaked in above-mentioned solution stand reaction 1h.A large amount of deionized water repeated flushing are used after complete reaction, then are turned It is stand-by to move to 40 DEG C of vacuum oven dry 8h.
Step (3), Cu@Cu2The synthesis of S: by step (2) obtained Cu/Cu (OH)2It is put into polytetrafluoroethyllining lining, Take 1mol/L thioacetyl amine aqueous solution as solvent, 110 DEG C of reaction 3-7h of hydro-thermal in reaction kettle.Obtained material after the reaction was completed Expect 60-80 DEG C of vacuum dry 1-2h again, obtains the self-supporting Cu@Cu of hollow tubular2S material;
Step (4), by the obtained Cu@Cu of step (3)2S is as working electrode, and platinized platinum is used as to electrode, and Hg/HgO makees Electrochemical property test is carried out on electrochemical operation platform for reference electrode.
Example 2 is 110 DEG C of obtained electrode material for super capacitor Cu@Cu by curing temperature2S is in current density 5mVs-1Current density under by CV figure measure area specific capacity be 3.68F cm-2, equivalent series resistance is 1.98 Ω.
Example 3
Step (1) pretreatment of foam copper: will buy resulting foam copper and be cut to area 1cm*1cm size.It is soaked in It is ultrasonically treated 30-60min respectively in the dilute hydrochloric acid solution and acetone soln that concentration is 1-2mol/L, at above-mentioned two step Reason, gets rid of the impurity on foam copper surface, then to be transferred into 20-40 DEG C of vacuum oven dry 6-8h stand-by.
Step (2), Cu/Cu (OH)2Synthesis: weigh molal weight than the NaOH and (NH for 2:14)2S2O8It is dissolved in respectively It is stirred in 25ml deionized water.After being stirred evenly respectively to the two, it is mixed rapidly, then step (1) pretreatment is obtained Foam copper be soaked in above-mentioned solution stand reaction 1h.A large amount of deionized water repeated flushing are used after complete reaction, then are turned It is stand-by to move to 20 DEG C of vacuum oven dry 6h.
Step (3), Cu@Cu2The synthesis of S: by step (2) obtained Cu/Cu (OH)2It is put into polytetrafluoroethyllining lining, Take 1mol/L thioacetyl amine aqueous solution as solvent, 120 DEG C of reaction 3-7h of hydro-thermal in reaction kettle.Obtained material after the reaction was completed Expect 60-80 DEG C of vacuum dry 1-2h again, obtains the self-supporting Cu@Cu of hollow tubular2S material.
Step (4), by the obtained Cu@Cu of step (3)2S is as working electrode, and platinized platinum is used as to electrode, and Hg/HgO makees Electrochemical property test is carried out on electrochemical operation platform for reference electrode.
Example 3 is 100 DEG C of obtained electrode material for super capacitor Cu@Cu by curing temperature2S is in current density 5mVs-1Current density under by CV figure measure area specific capacity be 2.37F cm-2, equivalent series resistance is 4.46 Ω.

Claims (1)

1. a kind of preparation method of hollow tubular self-supporting super capacitor electrode material, this method comprises:
Step 1: the pretreatment of foam copper;
By foam copper with concentration be 1-2mol/L dilute hydrochloric acid processing 30-60min, then with acetone soln be ultrasonically treated 30-60min, It is dry to be finally transferred into vacuum oven;
Step 2: synthesis Cu/Cu (OH)2
By NaOH and (NH4)2S2O8It is dissolved in deionized water respectively, by the deionized water solution of NaOH and (NH4)2S2O8Go from Sub- aqueous solution after mixing evenly, mixes rapidly respectively, makes mixed solution NaOH and (NH4)2S2O8Molal weight ratio be 2: 1;Then the foam copper that pretreatment obtains is soaked in stand in solution and is reacted;Last deionized water repeated flushing is transferred to 20- Dry 10-12h in 40 DEG C of vacuum oven;
Step 3: synthesis Cu@Cu2S;
By the obtained Cu/Cu of step 2 (OH)2It is put into polytetrafluoroethylcontainer container, the thioacetamide of 1mol/L is added as molten Agent, 100-120 DEG C of reaction 3-7h in reaction kettle;It is dry to after the reaction was completed, be transferred to vacuum oven;
Step 4: the dry hollow tubular Cu@Cu completed2Electrode material of the S as supercapacitor carries out chemical property survey Examination.
CN201811442133.9A 2018-11-29 2018-11-29 A kind of preparation method of hollow tubular self-supporting super capacitor electrode material Pending CN109545571A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811442133.9A CN109545571A (en) 2018-11-29 2018-11-29 A kind of preparation method of hollow tubular self-supporting super capacitor electrode material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811442133.9A CN109545571A (en) 2018-11-29 2018-11-29 A kind of preparation method of hollow tubular self-supporting super capacitor electrode material

Publications (1)

Publication Number Publication Date
CN109545571A true CN109545571A (en) 2019-03-29

Family

ID=65852297

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811442133.9A Pending CN109545571A (en) 2018-11-29 2018-11-29 A kind of preparation method of hollow tubular self-supporting super capacitor electrode material

Country Status (1)

Country Link
CN (1) CN109545571A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113299491A (en) * 2021-05-31 2021-08-24 中南大学 Photo-thermal enhanced supercapacitor electrode material and preparation method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105024071A (en) * 2015-06-24 2015-11-04 三峡大学 Cu2S/Cu anode material for lithium ion battery and preparation method
CN106629814A (en) * 2017-01-23 2017-05-10 吉林大学 Sulfur-doped three-dimensional porous cuprous oxide nano-material and application thereof to electrochemical hydrogen evolution reaction

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105024071A (en) * 2015-06-24 2015-11-04 三峡大学 Cu2S/Cu anode material for lithium ion battery and preparation method
CN106629814A (en) * 2017-01-23 2017-05-10 吉林大学 Sulfur-doped three-dimensional porous cuprous oxide nano-material and application thereof to electrochemical hydrogen evolution reaction

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
WANGDONG LU,ET AL.: ""Fabrication of cuprous sulfide nanorods supported on copper foam for nonenzymatic amperometric determination of glucose and hydrogen peroxide"", 《RSC ADV.》 *
田瀚卿: ""金属硫化物的制备复合及其超级电容器性能的研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113299491A (en) * 2021-05-31 2021-08-24 中南大学 Photo-thermal enhanced supercapacitor electrode material and preparation method thereof
CN113299491B (en) * 2021-05-31 2022-06-21 中南大学 Photo-thermal enhanced supercapacitor electrode material and preparation method thereof

Similar Documents

Publication Publication Date Title
Wang et al. Cation exchange formation of prussian blue analogue submicroboxes for high-performance Na-ion hybrid supercapacitors
Ni et al. Free-standing and highly conductive PEDOT nanowire films for high-performance all-solid-state supercapacitors
Liu et al. Ionic liquids in surface electrochemistry
CN104779380B (en) A kind of method that utilization electrochemistry prepares phosphorus alkene
CN104768871B (en) Graphene superthin section and its producing device, preparation method and capacitor and preparation method thereof
CN104600238B (en) Method for preparing directly soaking reaction type foamed nickel-graphene three-dimensional porous electrode
Yang et al. Ni–Co oxides nanowire arrays grown on ordered TiO 2 nanotubes with high performance in supercapacitors
KR101775468B1 (en) Electrode for the super capacitor and method of the same
CN108054021B (en) Bicarbonate nickel-poly-dopamine-graphene composite material and preparation method and application
Lu et al. Hollow core–sheath nanocarbon spheres grown on carbonized silk fabrics for self-supported and nonenzymatic glucose sensing
CN106158430A (en) A kind of preparation method of the electrode material for ultracapacitor
Li et al. 3D electrochemical sensor based on poly (hydroquinone)/gold nanoparticles/nickel foam for dopamine sensitive detection
CN103762090B (en) A kind of from afflux electrode material for super capacitor and preparation method thereof
CN106669739A (en) Transition metal sulfide/carbon nanotube composite material as well as preparation method and application thereof
CN105845448A (en) Homogeneous core-shell structure cobaltosic sulfide nanometer material, preparation method and application of being as super capacitor electrode material thereof
CN105862057A (en) Phosphorus-doped graphene quantum dot and electrochemistry preparing method thereof
CN105842318A (en) Preparation method and application of graphene/polypyrrole electrochemical sensor for trace-amount lead ion detection
CN108948100B (en) Preparation and application of two three-dimensional pseudo-rotaxane type polyacid-based metal organic framework materials
CN107017093A (en) A kind of sulfonated graphene/Ni (OH)2The Preparation method and use of composite
CN107452939A (en) A kind of high power capacity flexible lithium ion battery negative material and preparation method thereof
CN109637825A (en) A kind of nanometer nickel sulfide piece/carbon quantum dot composite material and preparation method and application
CN109267047A (en) A kind of preparation method of the flexible cloth electrode based on nickel manganese hydroxide
CN109856204A (en) A kind of carbon-based electrode method of modifying based on the synthesis of electrochemical in-situ graphene
CN109607521A (en) A kind of doped graphene material and its preparation method and application
Peng et al. A flexible and fully integrated wearable pressure sensing chip system for multi-scenario applications

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20190329

WD01 Invention patent application deemed withdrawn after publication