CN1404082A - Treatment method of activated carbon for super capacitor - Google Patents
Treatment method of activated carbon for super capacitor Download PDFInfo
- Publication number
- CN1404082A CN1404082A CN02112894A CN02112894A CN1404082A CN 1404082 A CN1404082 A CN 1404082A CN 02112894 A CN02112894 A CN 02112894A CN 02112894 A CN02112894 A CN 02112894A CN 1404082 A CN1404082 A CN 1404082A
- Authority
- CN
- China
- Prior art keywords
- activated carbon
- solution
- mol
- super capacitor
- deposited
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 239000003990 capacitor Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 21
- 229910021645 metal ion Inorganic materials 0.000 claims abstract description 10
- 150000002500 ions Chemical class 0.000 claims abstract description 4
- 239000013543 active substance Substances 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- 238000004758 underpotential deposition Methods 0.000 claims description 8
- 238000000967 suction filtration Methods 0.000 claims description 6
- 229910000156 lead(II) phosphate Inorganic materials 0.000 claims description 5
- 229910052924 anglesite Inorganic materials 0.000 claims description 4
- 238000002386 leaching Methods 0.000 claims description 2
- 239000003792 electrolyte Substances 0.000 abstract description 8
- 238000003860 storage Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000011149 active material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000001994 activation Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000005355 lead glass Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
A process for treating the activated carbon used for super capacitor features use of metal ion Al3+、Li+、Zn2+、Cu2+、Tl+、Pb2+Any one of the above is deposited on the surface of the activated carbon under-potential to provide faradaic pseudo-capacitance for the electrochemical double-layer capacitor. Any one of the ionic solutions can be added into the KoH electrolyte of the super capacitor, or any one of the ionic solutions can be used for modifying the activated carbon powder to ensure that the activated carbon powder is arranged in micropores of the activated carbon powderThe ions are deposited. The super container prepared by the invention is matched with a storage battery or other batteries to form a composite battery, so that the problem that the conventional battery cannot meet the requirements of high power, high capacity and quick charge is solved, the super container is widely applied to important departments of aerospace, military, traffic, electric power, communication and the like, and has important practical significance and broad prospects.
Description
Technical Field
The invention relates to a method for treating activated carbon used by a super capacitor, belonging to the technical field of super capacitor manufacturing.
Background
The demands of future war on competition and space weapons in the space field, such as laser weapons used for destroying or blinding enemy reconnaissance, communication satellite and the like, need energy sources with high power density for support. The starting and reliable launching power support of strategic weapon carrier vehicles in alpine regions require reliable high power output and energy storage power supply devices with excellent temperature characteristics. The enhancement of the environmental consciousness of people enables the electric automobile or the low-pollution hybrid electric automobile to be used as a clean vehicle to approach the life of people; the requirement for high-power of the electric vehicle in the starting and accelerating processes is improved. The existing battery is difficult to meet the requirements of high power, large capacity and quick charging. The electrochemical super capacitor is matched with a storage battery or other batteries to form the composite battery, so that the requirements on relevant indexes of the storage battery can be reduced, and the energy-saving effect is achieved. Computers have been applied to various fields of human society as a modern high-technology symbol, and supercapacitors are very suitable as a backup power source for computer systems with their excellent performance. Meanwhile, the super capacitor has excellent performance as an uninterruptible power supply of railway, electric power and communication systems. Carbon material based supercapacitors are of great practical interest for applications such as automotive, telecom, engine start, etc. due to their relatively low cost and superior performance.
In recent years, supercapacitors have become one of the most active research fields for materials, electronics, chemistry and physics multidisciplinary research in internationally developed countries (usa, russia, japan and european countries), and the goal thereof is to prepare electrode materials required for compact energy with high specific power and high specific capacity, electrolyte with wide electrochemical window and high conductivity, and further prepare large supercapacitors with ultra-high power and ultra-high capacity for power applications. The active carbon is used as the active substance of the super capacitor, the specific capacity is lower, the pure active carbon is difficult to meet the use requirement of the super capacitor in many fields as the active substance of the super capacitor, and the improvement of the specific capacity of the super capacitor becomes urgent.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a method for treating the activated carbon for the super capacitor, which can effectively improve the specific capacity of the super capacitor.
The technical scheme of the invention is as follows: the method for treating the active carbon for the super capacitor is to treat metal ions Al3+、Li+、Zn2+、Cu2+、Tl+、Pb2+Any one of the above is subjected to underpotential deposition on the surface of the activated carbon, so that the faradaic pseudo-capacitance is provided for the electrochemical double-layer capacitor.
The method can add the concentration of 1.0-3.0 multiplied by 10 into the KOH electrolyte of the super capacitor-2mol/LAl3+、1.0～4.0×10-2mol/L Li+、1.0～3.0×10-2mol/L Zn2+、0.5～2.0×10-2mol/LCu2+、1.0～3.0×10-2mol/L Tl+、1.0～2.0×10-2mol/L Pb2+Any one of the ionic solutions of (1). Al may also be used3+、Li+、Zn2+、Cu2+、Tl+、Pb2+Any one of the above modifies the activated carbon powder so that the ions are deposited in the micropores of the activated carbon.
In which Pb is used2+The method for modifying the active carbon powder is to use Pb (NO)3)2The solution is soaked in the activated carbon under vacuum condition to lead Pb (NO)3)2The solution completely enters the micropores of the activated carbon, the free solution is filtered out, then the NaOH solution is added, and the stirring is carried out, so that Pb (OH) is deposited on the surface of the activated carbon2And carrying out suction filtration to obtain 5-30% Pb (OH) deposit2The active substance of (1). Or with Pb (NO)3)2The solution is soaked in the activated carbon under vacuum condition to lead Pb (NO)3)2The solution completely enters the micropores of the active carbon, free solution is filtered out, and then H is added2SO4Stirring the solution to deposit PbSO on the surface of the activated carbon4And leaching to obtain 10-30% PbSO4The active substance of (1). Or with Pb (NO)3)2The solution is soaked in the activated carbon under vacuum condition to lead Pb (NO)3)2The solution completely enters the micropores of the active carbon, free solution is filtered out, and then H is added3PO4Stirring the solution to deposit Pb on the surface of the activated carbon3(PO4)2And carrying out suction filtration to obtain 5-30% deposited Pb3(PO4)2The active substance of (1).
The technology for improving the capacitance of the double-layer capacitor by utilizing the Faraday quasi-capacitance is very significant, and the invention searches for metal ions capable of generating under-potential deposition on the surface of an activated carbon material so as to improve the specific capacitance of an activated carbon electrode and further increase the capacity of a super capacitor. Monolithic double layer capacitors are based on the double layer capacitance at the solid/liquid interface of high specific surface area materials, such as activated carbon. Similar to conventional capacitors, storage of electrical energy is based on charging within an electrolyte bilayer across the electrode/solution interface. When a direct voltage is applied to the interface of the electrodes, an electrical double layer builds up to store electrical energy. The electrical energy stored in the bilayer is proportional to the surface area of the electrode and inversely proportional to the thickness of the bilayer. Electrochemical Double Layer Capacitors (EDLCs) are devices comprising a pair of ideally polarized electrodes; in other words, only those devices that do not undergo faradaic reactions in the operating potential range can be considered EDLCs, and all accumulated charge is used to form the conductor/solution bilayer. The so-called super capacitor includes, besides the electric double layer electric energy storage, the two-dimensional and quasi two-dimensional faradaic reaction on the electrode interface, which makes the electric energy converted into chemical energy to be stored on the interface. The metal ions can be reduced to metal on the electrode when the electrode potential is lower than the reversible equilibrium electrode potential, and some metal ions can be deposited on a substrate of dissimilar metal when the electrode potential is positive than the reversible equilibrium electrode potential to form a metal monoatomic layer, namely, so-called underpotential deposition. This process differs from the typical deposition process in that a monolayer of metal atoms is formed. Due to the thermodynamic reasons of the electrode/electrolyte interface, underpotential deposition, such as monolayer deposition of H or Pb on rare metals, can occur before the three-dimensional deposition of new phases, so that the surface of the electrode is partially covered; this forms an electro-absorption quasi-capacitor.
The metal ions which are subjected to the underpotential deposition on the surface of the activated carbon material theoretically can be subjected to the underpotential deposition on the surface of an activated carbon electrode respectively, and the metal ions which are subjected to the underpotential deposition on the surface of the activated carbon electrode of the super capacitor are found, and the addition of the metal ions into the super capacitor contributes to the capacity increase. Taking Pb as an example，Pb2+In the capacitor system, Pb (OH)2、Pb3(PO4)2Or PbSO4The form is deposited on the surface of the negative electrode activated carbon, and the negative electrode undergoes the following electrochemical reaction when the capacitor is charged and discharged. Providing faraday pseudocapacitance for capacitor operation.
Negative electrode:
to prevent Pb (OH)2Or Pb3(PO4)2Pb dissolved in alkaline electrolyte2+Lead crystal branches are generated to generate a short circuit phenomenon, SO is added into an electrolyte system4 2-。
Detailed Description
The first embodiment is as follows: adding 2.0 x 10 of KOH electrolyte into a super capacitor-2mol/L Al3+Al (OH)3Containing 3.0X 10-2mol/L Li+Of LiOH, containing 2.0X 10-2mol/L Zn2+ZnO of (1.0X 10)-2mol/LCu2+Cuso of (2.0X 10)-2mol/L Tl+TlNo of3Containing 1.5X 10-2mol/L Pb2+Pb (Ac)2In the above case, the metal ions are deposited on the surface of the activated carbon in the form of alkali by the supercapacitor charge-discharge activation process.
Example two: with Al3+、Li+、Zn2+、Cu2+、Tl+、Pb2+Any one of the active substances, namely the activated carbon powder, is modified by a certain method, so that the ions are deposited in micropores of the activated carbon.
Here with Pb2+The method of processing is illustrated for example:
(1) with 0.7mol/L Pb (NO)3)2The solution is soaked in the activated carbon under vacuum condition to lead Pb (NO)3)2The solution completely enters the micropores of the active carbon, free solution is filtered out, 7mol/L NaOH solution is added, and the mixture is stirred to ensure thatDepositing Pb (OH) on the surface of the obtained activated carbon2Suction filtration to obtain the deposit Pb (OH)2The active material of (1), Pb (OH) in the finally obtained active material211% of the total weight of the material, and a supercapacitor made therefrom, 11% of Pb (OH) is deposited2When the specific capacity is increased by 30.5F/g.
(2) With 0.7mol/L Pb (NO)3)2The solution is soaked in the activated carbon under vacuum condition to lead Pb (NO)3)2The solution completely enters the micropores of the active carbon, the free solution is filtered out, and then 1.0mol/L H is added2SO4Stirring the solution to deposit PbSO on the surface of the activated carbon4And carrying out suction filtration to obtain the deposited PbSO4Active substance of (2), PbSO in the finally obtained active substance4Accounting for 12 percent, thereby manufacturing the super capacitor.
(3) With 0.7mol/L Pb (NO)3)2The solution is soaked in the activated carbon under vacuum condition to lead Pb (NO)3)2The solution completely enters the micropores of the active carbon, the free solution is filtered out, and then 1.0mol/L H is added3PO4Stirring the solution to deposit Pb on the surface of the activated carbon3(PO4)2Suction filtering to obtain deposited Pb3(PO4)2Active material of (2), Pb in the finally obtained active material3(PO4)2Accounting for 10 percent, thereby manufacturing the super capacitor.
Claims (6)
1. A process for treating the activated carbon used for super capacitor features that the metal ions Al3+、Li+、Zn2+、Cu2+、Tl+、Pb2+Any one of the above is subjected to underpotential deposition on the surface of the activated carbon, so that the faradaic pseudo-capacitance is provided for the electrochemical double-layer capacitor.
2. The method of claim 1, wherein the concentration of KOH in the supercapacitor is 1.0 to 3.0X 10-2mol/L Al3+、1.0～4.0×10-2mol/L Li+、1.0～3.0×10-2ol/L Zn2+、0.5～2.0×10-2mol/L Cu2+、1.0～3.0×10-2mol/L Tl+、1.0～2.0×10-2mol/L Pb2+Any one of the ionic solutions of (1).
3. The method of claim 1, wherein Al is used3+、Li+、Zn2+、Cu2+、Tl+、Pb2+Any one of the above modifies the activated carbon powder so that the ions are deposited in the micropores of the activated carbon.
4. A method for treating activated carbon as claimed in claim 3, characterized in that Pb is used2+The method for modifying the active carbon powder is to use Pb (NO)3)2The solution is soaked in the activated carbon under vacuum condition to lead Pb (NO)3)2The solution completely enters the micropores of the activated carbon, the free solution is filtered out, then the NaOH solution is added, and the stirring is carried out, so that Pb (OH) is deposited on the surface of the activated carbon2And carrying out suction filtration to obtain 5-30% Pb (OH) deposit2The active substance of (1).
5. A method for treating activated carbon as claimed in claim 3, characterized in that Pb is used2+The method for modifying the active carbon powder is to use Pb (NO)3)2The solution is soaked in the activated carbon under vacuum condition to lead Pb (NO)3)2The solution completely enters the micropores of the active carbon, free solution is filtered out, and then H is added2SO4Stirring the solution to deposit PbSO on the surface of the activated carbon4And leaching to obtain 10-30% PbSO4The active substance of (1).
6. A method for treating activated carbon as claimed in claim 3, characterized in that Pb is used2+The method for modifying the active carbon powder is to use Pb (NO)3)2The solution is soaked inthe activated carbon under vacuum condition to lead Pb (NO)3)2The solution completely enters the micropores of the active carbon, free solution is filtered out, and then H is added3PO4Stirring the solution to deposit Pb on the surface of the activated carbon3(PO4)2And carrying out suction filtration to obtain 5-30% deposited Pb3(PO4)2The active substance of (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021128944A CN1266721C (en) | 2002-04-18 | 2002-04-18 | Treatment method of activated carbon for super capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021128944A CN1266721C (en) | 2002-04-18 | 2002-04-18 | Treatment method of activated carbon for super capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1404082A true CN1404082A (en) | 2003-03-19 |
| CN1266721C CN1266721C (en) | 2006-07-26 |
Family
ID=4742328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021128944A Expired - Fee Related CN1266721C (en) | 2002-04-18 | 2002-04-18 | Treatment method of activated carbon for super capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1266721C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157735A (en) * | 2011-03-18 | 2011-08-17 | 哈尔滨工业大学 | Electrode material used for super lead-acid battery, preparation method thereof, and method for preparing cathode of super lead-acid battery by utilizing same |
| CN101728085B (en) * | 2010-01-26 | 2011-11-02 | 中国科学院青岛生物能源与过程研究所 | Carbon composite metal nitride electrode material and asymmetric electrochemical super capacitor |
| CN104576084A (en) * | 2013-10-11 | 2015-04-29 | 天津得瑞丰凯新材料科技有限公司 | Preparation method of nano-porous carbon aerogel of super capacitor |
| CN105609327A (en) * | 2015-12-19 | 2016-05-25 | 湘潭大学 | Porous active carbon/copper ion super-capacitor preparation method |
| CN116230417A (en) * | 2023-03-17 | 2023-06-06 | 天津得瑞丰凯新材料科技有限公司 | Preparation method of nano porous carbon for super capacitor |
-
2002
- 2002-04-18 CN CNB021128944A patent/CN1266721C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101728085B (en) * | 2010-01-26 | 2011-11-02 | 中国科学院青岛生物能源与过程研究所 | Carbon composite metal nitride electrode material and asymmetric electrochemical super capacitor |
| CN102157735A (en) * | 2011-03-18 | 2011-08-17 | 哈尔滨工业大学 | Electrode material used for super lead-acid battery, preparation method thereof, and method for preparing cathode of super lead-acid battery by utilizing same |
| CN102157735B (en) * | 2011-03-18 | 2013-02-27 | 哈尔滨工业大学 | Electrode material used for super lead-acid battery, preparation method thereof, and method for preparing cathode of super lead-acid battery by utilizing same |
| CN104576084A (en) * | 2013-10-11 | 2015-04-29 | 天津得瑞丰凯新材料科技有限公司 | Preparation method of nano-porous carbon aerogel of super capacitor |
| CN105609327A (en) * | 2015-12-19 | 2016-05-25 | 湘潭大学 | Porous active carbon/copper ion super-capacitor preparation method |
| CN105609327B (en) * | 2015-12-19 | 2018-04-03 | 湘潭大学 | A kind of preparation method of porous activated carbon/copper ion ultracapacitor |
| CN116230417A (en) * | 2023-03-17 | 2023-06-06 | 天津得瑞丰凯新材料科技有限公司 | Preparation method of nano porous carbon for super capacitor |
| CN116230417B (en) * | 2023-03-17 | 2024-05-03 | 天津得瑞丰凯新材料科技有限公司 | Preparation method of nano porous carbon for super capacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1266721C (en) | 2006-07-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Endo et al. | High power electric double layer capacitor (EDLC's); from operating principle to pore size control in advanced activated carbons | |
| Kovalenko et al. | A major constituent of brown algae for use in high-capacity Li-ion batteries | |
| US9118087B2 (en) | Electrode for lithium secondary battery | |
| US6454816B1 (en) | Supercapacitor using electrode of new material and method of manufacturing the same | |
| US5875092A (en) | Proton inserted ruthenium oxide electrode material for electrochemical capacitors | |
| EP2850678B1 (en) | An apparatus and associated methods | |
| CN102823036A (en) | Power storage device and method for manufacturing the same | |
| CN1266721C (en) | Treatment method of activated carbon for super capacitor | |
| Schneuwly | Charging ahead [ultracapacitor technology and applications] | |
| EP2987193A1 (en) | Method and apparatus for energy storage | |
| CN102376454A (en) | Single-side high specific surface area aluminum material | |
| Rout et al. | Fundamentals and Supercapacitor Applications of 2D Materials | |
| Li et al. | Fe 3 O 4/functional exfoliation graphene on carbon paper nanocomposites for supercapacitor electrode | |
| JP4802868B2 (en) | Electrochemical capacitor and manufacturing method thereof | |
| WO2010149515A1 (en) | Coated foam electrode for an energy store | |
| CN101950673A (en) | High-multiplying-power super capacitor | |
| EP3482444A1 (en) | Self-charging and/or self-cycling electrochemical cells | |
| CN101127276A (en) | Organic electrolyte system mixed electrochemical capacitor and preparation method thereof | |
| JP2000036441A (en) | Electrical energy storage device and manufacture thereof | |
| CN113241261B (en) | Stacked cross-linked structure supercapacitor electrode material, and preparation method and application thereof | |
| KR101060288B1 (en) | composite electrode and method for manufacturing the same | |
| EP2587573A1 (en) | Electrode collector material and production method for same | |
| KR101859432B1 (en) | Portable subsidiary power supply device for rapid charging using super capacitor | |
| US5841627A (en) | Pseudo-capacitor device for aqueous electrolytes | |
| Ashley | Surging ahead with ultracapacitors |
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 | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangsu Shuangde Group Co., Ltd. Assignor: Longyuan Shuangdeng Power Supply co., Ltd., Jiangsu Contract fulfillment period: 2009.3.1 to 2019.3.1 contract change Contract record no.: 2009320000348 Denomination of invention: Treatment process of active carbon for super capacitor Granted publication date: 20060726 License type: Exclusive license Record date: 2009.3.13 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.3.1 TO 2019.3.1; CHANGE OF CONTRACT Name of requester: JIANGSU SHUANGDENG GROUP CO.,LTD. Effective date: 20090313 |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |