WO2019039722A1 - 납산전지용 다층구조상 전극 및 이를 포함하는 납산 기반 축전지 시스템 - Google Patents
납산전지용 다층구조상 전극 및 이를 포함하는 납산 기반 축전지 시스템 Download PDFInfo
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- WO2019039722A1 WO2019039722A1 PCT/KR2018/007384 KR2018007384W WO2019039722A1 WO 2019039722 A1 WO2019039722 A1 WO 2019039722A1 KR 2018007384 W KR2018007384 W KR 2018007384W WO 2019039722 A1 WO2019039722 A1 WO 2019039722A1
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- electrode
- carbon material
- electrode layer
- lead
- surface area
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/06—Lead-acid accumulators
- H01M10/12—Construction or manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/14—Electrodes for lead-acid accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/68—Selection of materials for use in lead-acid accumulators
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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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a lead-acid based battery system, and more particularly, to a lead-acid battery multi-layered electrode having improved electrode life and performance by forming a multi-layered structure, and a lead-acid battery cell system including the same.
- Portable rechargeable energy storage devices such as rechargeable electrochemical batteries and capacitors, are becoming increasingly essential as a driving force in the modern transportation and communications sector.
- a flooded lead-acid battery can be operated with a partial state of charge (PSoC), for example, approximately 50 to 80% charged state, It differs from the usual SLI (start, ignition, and ignition) that is activated.
- PSoC partial state of charge
- HEV hybrid electric vehicle
- a battery of a hybrid electric vehicle (HEV) can operate at PSoC, for example, at about 50 to 80% charge.
- HEV hybrid electric vehicle
- Pb 2+ ions there is the formation of PbSO 4 determined by the discharge of the PbSO 4 determines local PbSO 4 to form a localized electron transfer channel is decreasing the area of contact between the electrode surface and the electrolyte as it grows, by reducing the surface electrical conductivity Crystals are largely formed, the utilization ratio of the electrode active material is decreased, and PbO 2 / Pb can not be returned to the battery during the charging process, thereby shortening the lifetime of the battery.
- the improved lead-acid based battery system is a technology developed to improve the life of existing lead-acid batteries.
- the carbon mixture layer When the carbon mixture layer is applied to the surface, it prevents localized lead sulphate (PbSO 4 ) crystal growth due to the increased surface electrical conductivity, 2 / Pb to improve battery life.
- the improved lead-acid based battery system attempts to improve the lifetime of the electrode by introducing a carbon mixed layer on the surface of the electrode.
- the electric conductivity of the carbon mixed layer is low, the PbSO 4 crystal growth can not be prevented or the carbon layer is removed from the cathode electrode Still remained.
- Another object of the present invention is to provide a lead acid battery system capable of not only improving the capacity reduction during a high rate charge / discharge operation but also improving the system life by employing a multi-layered electrode for a lead battery having excellent adhesion between a carbon layer and an electrode .
- the present invention provides an electrode support comprising: an electrode; A first electrode layer including a lead active material and carbon formed on the surface of the support; And a carbon-containing second electrode layer formed on the surface of the first electrode layer.
- the first electrode layer comprises a high specific surface area carbon material, a high conductivity carbon material, a lead active material and a binder.
- the weight ratio of the lead active material content to the sum of the high specific surface area carbon material, the high conductivity carbon material and the binder is 1: 9 to 9: 1.
- the high specific surface area carbon material, the high conductivity carbon material, and the binder are 25 to 80 wt%, 15 to 70 wt%, and 1 to 40 wt%, respectively, of the total content.
- the second electrode layer comprises a high specific surface area carbon material, a high conductivity carbon material and a binder.
- the high specific surface area carbon material comprises 25 to 80 wt%
- the high conductivity carbon material comprises 15 to 70 wt%
- the binder is 1 to 40 wt%.
- the high specific surface area carbon material has a specific surface area of 500 to 3,000 m 2 / g.
- the highly conductive carbon material has an electric conductivity of 20 S / m or more.
- the binder is at least one selected from the group consisting of polyester, PET, PTFE, PVdF, and CMC.
- the first electrode layer and the second electrode layer are formed to a thickness of 10 ⁇ to 500 ⁇ .
- the present invention also provides a lead-acid based battery system comprising any one of the above-described multi-layered electrodes.
- the electrode is a cathode.
- the multi-layer structure electrode for a lead-acid battery of the present invention can solve the problem that the carbon layer coated on the lead-acid battery negative electrode is removed by improving the adhesion force as well as reducing the resistance of the electrode interface.
- the lead-acid battery system of the present invention employs a multi-layered electrode for a lead-acid battery having excellent adhesion between a carbon layer and an electrode, thereby improving the capacity reduction and the life of the system during high- Cycle performance can be realized.
- FIG. 1 is a graph showing a capacity evaluation test result using an electrode in a multi-layer structure obtained according to an embodiment of the present invention.
- FIG. 2 is a graph of a life test result using an electrode in a multi-layer structure obtained according to an embodiment of the present invention.
- the technical feature of the present invention resides in a multi-layer structure electrode for a lead-acid battery which forms a carbon layer by first forming a layer containing a lead active material and carbon before forming a carbon layer on the electrode surface of the lead-acid battery.
- a lead active material having a surface property similar to that of a lead-acid electrode of a lead-acid battery and a lead-containing active material and a carbon-containing layer simultaneously containing carbon having a surface similar to that of the carbon layer are formed on the electrode surface,
- the adhesion between the electrode and the carbon layer is improved and the resistance of the electrode interface is reduced, thereby improving the performance of the electrode as well as the life of the electrode.
- the present invention provides an electrode support comprising: an electrode; A first electrode layer including a lead active material and carbon formed on the surface of the support; And a carbon-containing second electrode layer formed on the surface of the first electrode layer.
- the first electrode layer comprises a high specific surface area carbon material, a high conductivity carbon material, a lead active material and a binder
- the second electrode layer may comprise a high specific surface area carbon material, a high conductivity carbon material and a binder.
- the first electrode layer is formed by replacing the carbon material contained in the second electrode layer with a certain amount of lead active material.
- the weight ratio of the lead active material content to the sum of the high specific surface area carbon material, the high conductivity carbon material and the binder is 1: 9 to 9: 1. If the weight ratio is less than the above range, there is a problem that the lead active material does not act as an additive and the electrical conductivity of the first mixed layer is inferior. If the weight ratio is exceeded, the specific surface area of the second mixed layer may decrease have. In this case, 25 to 80% by weight of the high specific surface area carbon material, 15 to 70% by weight of the high conductivity carbon material, and 1 to 40% by weight of the binder may be contained in the total content. The weight ratio was determined experimentally, and an appropriate effect could not be obtained outside the weight ratio range.
- the second mixed layer may also contain 25 to 80 wt% of the high specific surface area carbon material, 15 to 70 wt% of the high conductive carbon material, and 1 to 40 wt% of the binder.
- the weight ratio was determined experimentally, and an appropriate effect could not be obtained outside the weight ratio range.
- the lead active material contained only in the first mixed layer may be at least one powder selected from the group consisting of Pb, PbO, PbO 2 , PbCl 2 , and PbSO 4 and may be used in a size of 0.1 to 100 ⁇ m.
- the high specific surface area carbon material contained in the first electrode layer and the second electrode layer may be a carbon material having a specific surface area of 500 to 3,000 m 2 / g.
- the specific surface area of the high specific surface area carbon material is less than 500 m 2 / g,
- the electrode is coated with a small amount of the electrode, the electrolyte does not penetrate into the electrode, thereby deteriorating the electrode performance.
- the excess surface area exceeding 3,000 m 2 / g promotes the generation of hydrogen, .
- the high specific surface area carbon material used in the present invention may be any of known carbon materials as long as it is within the specific surface area described above, and may be activated carbon, carbon black, acetylene black or a combination thereof in one embodiment.
- the scattering of the carbon material causes the stability of the working process to be very low, and the electrode layer having a size of more than 100 mu m Since uniform mixing is not achieved in constituting the slurry to be formed.
- the highly conductive carbon material contained in the first electrode layer and the second electrode layer may be a carbon material having an electrical conductivity of 20 S / m or more. If the electrical conductivity of the highly conductive carbon material is less than 20 S / m, the electrical conductivity of the carbon active material decreases, The electrical resistance is increased.
- the highly conductive carbon material used in the present invention may be any known carbon material as long as it is in the range of the above-mentioned electric conductivity, in one embodiment may be graphite, graphene, carbon nanotube or a combination thereof . Highly Conductive Carbon Material Powders of the same size as the high specific surface area carbon material may also be used.
- the binder contained in the first electrode layer and the second electrode layer may be any known polymer material for the binder, and may be one or more selected from the group consisting of, for example, polyester, PET, PTFE, PVdF and CMC. Particularly, since the binder must be uniformly mixed with the carbon material, it can be used in a mixed state with the solvent.
- the first electrode layer and the second electrode layer may be formed by dip coating method after each of the slurry for electrode coating including the above-described components is manufactured. After coating the first electrode layer, a second electrode layer is formed on the first electrode layer So that an electrode having a multilayered structure can be realized. At this time, the thicknesses of the first electrode layer and the second electrode layer coated on the electrode may be respectively 10 ⁇ ⁇ to 500 ⁇ ⁇ . Particularly, in the case of the second electrode layer, if the thickness is less than 10 ⁇ , a significant performance of the carbon layer can not be expected. If the thickness is 500 ⁇ or more, the electrode surface may be clogged by the carbon layer,
- the multi-layered electrode of the present invention is manufactured by preparing a slurry for a first electrode layer and a second electrode layer, dip coating a lead electrode slurry on the first electrode layer slurry, For 0.5 to 10 hours to form a first electrode layer, dip coating the second electrode layer slurry, and then drying the same to form a second electrode layer.
- the lead-acid based battery system of the present invention includes the above-described multi-layered electrode. That is, the electrode plate having the above-described structure may be implemented as a secondary battery including at least one of a cathode electrode and a cathode electrode.
- the anode of the present invention may be used for both the anode and the cathode, It is possible to implement a secondary battery with a structure impregnated with sulfuric acid.
- the lead-acid based battery system of the present invention can realize the above-described multi-layered electrode as a cathode.
- Activated carbon as high specific surface area carbon and graphite as high electric conductivity carbon were selected, and activated carbon and graphite were pulverized to prepare powders having a size of 10-30 ⁇ .
- PbO was selected as a lead active material and pulverized to prepare powders having a size of 10-30 ⁇ .
- a second electrode layer active material composed of only carbon powder (content ratio of activated carbon and graphite: 1: 1) was prepared.
- Slurry 1 for the first electrode layer was prepared by mixing 90 wt% of the first electrode layer active material and 10 wt% of CMC as a binder as solids and distilled water so that the solids concentration was 40 wt%.
- slurry 1 for a second electrode layer was prepared by mixing 90 wt% of the second electrode active material and 10 wt% of CMC as a binder as solids and distilled water so that the solids concentration was 40 wt%.
- a single layer electrode 1 having a first electrode layer having a thickness of 50 ⁇ ⁇ was prepared through dip coating using a slurry for a first electrode layer on an electrode plate coated with a flux.
- Layer electrode 1 was formed by further forming a second electrode layer having a thickness of 50 ⁇ ⁇ on the surface of the first electrode layer through dip coating using the slurry for the second electrode layer with the first electrode layer formed thereon.
- the electrode 2 in the multilayer structure was prepared in the same manner as in Example 1 except that the first electrode layer active material was composed of 75 wt% of carbon powder (content ratio of activated carbon and graphite: 1: 1) and 25 wt% of lead active material.
- the electrode 1 in the multi-layer structure obtained in Example 1 was used as a cathode electrode, fixed to a case using a positive electrode and a separator, and then impregnated with a sulfuric acid solution having a specific gravity of 1.3 to prepare a unit cell 1.
- Unit cell 2 was prepared in the same manner as in Example 3, except that the electrode 2 in the multilayer structure obtained in Example 2 was used as a cathode electrode.
- a comparative electrode was prepared in the same manner as in Example 1, except that the second electrode layer was directly formed on the electrode plate coated with the flux without forming the first electrode layer.
- a comparative unit cell was prepared in the same manner as in Example 3, except that the comparative anode was used as the cathode electrode.
- the capacity was evaluated by charging until it reached 2.45 V with a current of 0.1 C (10 hour current), leaving it for 10 minutes for voltage and temperature stabilization, then discharging at a current of 0.1 C until reaching 1.75 V Respectively.
- FIG. 1 shows only the results of the discharge. As shown in FIG. 1, the capacity of the unit cell including the electrode in the multilayer structure obtained in the present invention is improved.
- Example 3 The unit cell 1, the unit cell 2 and the comparative unit cell obtained in Example 3, Example 4, and Comparative Example 2 were evaluated for life as described below, and the results are shown in FIG.
- the life cycle is evaluated by charging each unit cell at a current of 0.1 C and charging it at 0.5 C (2 hour current) for 61 seconds. The discharge for 60 seconds was repeated at 0.5C. The cycle was terminated when the discharge end voltage reached 1.2V.
Abstract
Description
Claims (12)
- 납으로 구성된 전극지지체;상기 지지체 표면에 형성되는 납활물질 및 카본 포함 제1전극층; 및상기 제1전극층 표면에 형성되는 카본포함 제2전극층;을 포함하는 납산전지용 다층구조상 전극.
- 제 1 항에 있어서,상기 제1전극층은 고비표면적 카본재료, 고전도성 카본재료, 납활물질 및 바인더를 포함하는 것을 특징으로 하는 납산전지용 다층구조상 전극.
- 제 2 항에 있어서,상기 납활물질의 함량과 상기 고 비표면적 카본재료, 고 전도성 카본재료 및 바인더의 합산함량의 중량비는 1:9 내지 9:1인 것을 특징으로 하는 납산전지용 다층구조상 전극.
- 제 3 항에 있어서,상기 합산함량 중 상기 고 비표면적 카본 재료는 25 내지 80 중량%, 상기 고 전도성 카본 재료는 15 내지 70중량%, 및 바인더는 1 내지 40중량%인 것을 특징으로 하는 납산전지용 다층구조상 전극.
- 제 1 항에 있어서,상기 제2전극층은 고비표면적 카본재료, 고전도성 카본재료 및 바인더를 포함하는 것을 특징으로 하는 납산전지용 다층구조상 전극.
- 제 5 항에 있어서,상기 고 비표면적 카본 재료는 25 내지 80 중량%, 상기 고 전도성 카본 재료는 15 내지 70중량%, 및 바인더는 1 내지 40중량%로 포함되는 것을 특징으로 하는 납산전지용 다층구조상 전극.
- 제 1 항 내지 제 6 항 중 어느 한 항에 있어서,상기 고비표면적 카본재료는 비표면적이 500 내지 3,000 m2/g인 것을 특징으로 하는 납산전지용 다층구조상 전극.
- 제 1 항 내지 제 6 항 중 어느 한 항에 있어서,상기 고전도성 카본재료는 전기전도도가 20S/m이상인 것을 특징으로 하는 납산전지용 다층구조상 전극.
- 제 1 항 내지 제 6 항 중 어느 한 항에 있어서,상기 바인더는 폴리에스테르, PET, PTFE, PVdF, CMC로 구성된 그룹에서 선택되는 1개 이상인 것을 특징으로 하는 납산전지용 다층구조상 전극.
- 제 1 항 내지 제 6 항 중 어느 한 항에 있어서,상기 제1전극층 및 제2전극층은 10㎛ 내지 500㎛ 두께로 형성되는 것을 특징으로 하는 납산전지용 다층구조상 전극.
- 제 1 항 내지 제 6 항 중 어느 한 항의 다층구조상 전극을 포함하는 납산 기반 축전지 시스템.
- 제 11 항에 있어서,상기 전극은 음극인 것을 특징으로 하는 납산 기반 축전지 시스템.
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2003051306A (ja) * | 2001-08-07 | 2003-02-21 | Furukawa Battery Co Ltd:The | 鉛蓄電池用負極 |
JP2010257673A (ja) * | 2009-04-23 | 2010-11-11 | Furukawa Battery Co Ltd:The | 鉛蓄電池 |
JP2011071112A (ja) * | 2009-08-27 | 2011-04-07 | Furukawa Battery Co Ltd:The | 鉛蓄電池用複合キャパシタ負極板及び鉛蓄電池 |
JP5348130B2 (ja) * | 2008-03-24 | 2013-11-20 | 日本ゼオン株式会社 | 鉛蓄電池用電極 |
JP2014505968A (ja) * | 2010-12-21 | 2014-03-06 | コモンウェルス サイエンティフィック アンドインダストリアル リサーチ オーガナイゼーション | 鉛蓄電池システム用の電極及び蓄電装置 |
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- 2017-08-25 KR KR1020170108124A patent/KR102085301B1/ko active IP Right Grant
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- 2018-06-29 WO PCT/KR2018/007384 patent/WO2019039722A1/ko active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2003051306A (ja) * | 2001-08-07 | 2003-02-21 | Furukawa Battery Co Ltd:The | 鉛蓄電池用負極 |
JP5348130B2 (ja) * | 2008-03-24 | 2013-11-20 | 日本ゼオン株式会社 | 鉛蓄電池用電極 |
JP2010257673A (ja) * | 2009-04-23 | 2010-11-11 | Furukawa Battery Co Ltd:The | 鉛蓄電池 |
JP2011071112A (ja) * | 2009-08-27 | 2011-04-07 | Furukawa Battery Co Ltd:The | 鉛蓄電池用複合キャパシタ負極板及び鉛蓄電池 |
JP2014505968A (ja) * | 2010-12-21 | 2014-03-06 | コモンウェルス サイエンティフィック アンドインダストリアル リサーチ オーガナイゼーション | 鉛蓄電池システム用の電極及び蓄電装置 |
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KR102085301B1 (ko) | 2020-03-05 |
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