WO2018038479A1 - Électrode pour batterie secondaire comprenant des trous fins - Google Patents

Électrode pour batterie secondaire comprenant des trous fins Download PDF

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Publication number
WO2018038479A1
WO2018038479A1 PCT/KR2017/009079 KR2017009079W WO2018038479A1 WO 2018038479 A1 WO2018038479 A1 WO 2018038479A1 KR 2017009079 W KR2017009079 W KR 2017009079W WO 2018038479 A1 WO2018038479 A1 WO 2018038479A1
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WO
WIPO (PCT)
Prior art keywords
electrode
mixture layer
electrode mixture
fine holes
secondary battery
Prior art date
Application number
PCT/KR2017/009079
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English (en)
Korean (ko)
Inventor
이솔닢
이혁무
오송택
Original Assignee
주식회사 엘지화학
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
Priority claimed from KR1020170101381A external-priority patent/KR102054326B1/ko
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to CN201780004280.5A priority Critical patent/CN108292737B/zh
Priority to EP17843899.0A priority patent/EP3370280B1/fr
Priority to US15/772,755 priority patent/US10818929B2/en
Publication of WO2018038479A1 publication Critical patent/WO2018038479A1/fr

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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
    • H01M4/04—Processes of manufacture in general
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • 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

Definitions

  • the present invention relates to a secondary battery electrode containing fine holes.
  • lithium secondary batteries such as lithium ion batteries and lithium ion polymer batteries is high.
  • the electrode assembly constituting the secondary battery has a structure in which a positive electrode and a negative electrode are manufactured by forming an electrode mixture layer including an electrode active material on one or both surfaces of the electrode assembly, and a separator is interposed between the positive electrode and the negative electrode. Is formed.
  • the capacity of such an electrode assembly may be maximized by increasing the loading amount of the electrode mixture layer on the current collector.
  • the electrode having a very high loading amount of the electrode mixture layer has an excessively thick thickness of the electrode mixture layer, so that electrolyte diffusion does not easily occur in the depth direction of the electrode mixture layer, and the electrode loading layer has a lower loading amount than the electrode. , Li-plating phenomenon in which lithium is precipitated at low SOC occurs frequently.
  • the present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.
  • a plurality of fine particles consisting of a horn shape in which the electrode mixture layer is sequentially reduced in diameter from the vertical cross-sectional surface toward the current collector
  • the electrolyte can be more easily diffused through the fine holes in the depth direction of the electrode mixture layer, and thus, despite the high loading amount of the electrode mixture layer, lithium-plating phenomenon
  • the fine holes include protrusions corresponding to the fine holes Since it is formed by a mold or a roller to be formed, compared to the conventional form of a pattern structure using a laser, The present invention has been completed to prevent a decrease in capacity and to eliminate or significantly reduce a defective rate of a product caused by particles separated from the electrode mixture layer by the laser.
  • An electrode mixture layer containing an electrode active material is formed on one or both surfaces of the current collector;
  • the electrode mixture layer includes a plurality of fine holes indented toward the current collector from the vertical cross-sectional surface
  • Each of the fine holes may have a horn-shaped structure in which the diameter decreases gradually from the surface in the vertical section toward the current collector.
  • the electrolyte can be more easily diffused in the depth direction of the electrode mixture layer, thereby preventing the occurrence of lithium-plating phenomenon, despite the high loading amount of the electrode mixture layer, Deterioration of the electrical performance of the electrode can be prevented, and during the charging and discharging process, the lithium ions can be smoothly moved, thereby improving the quick charging performance.
  • the fine holes may be a structure formed in the electrode mixture layer having a loading amount of 3.5 to 5.5 mAh / cm 2 and porosity of 25% to 35%.
  • the loading amount and porosity range of the electrode mixture layer is a range capable of exhibiting a desired high capacity of the secondary battery including the electrode, and the electrode for secondary batteries according to the present invention has an electrode mixture layer to have the loading amount and porosity range.
  • the electrolyte can be more easily diffused in the depth direction of the electrode mixture layer, whereby a desired effect can be obtained.
  • the electrode When the loading amount of the electrode mixture layer is out of the range, is too small, or the porosity is out of the range, is too large, the capacity of the secondary battery including the electrode cannot be improved, on the contrary, the electrode When the loading amount of the mixture layer is out of the range, is too large, or the porosity is out of the range, and is too small, easy diffusion of the electrolyte may be difficult even though the plurality of fine holes are formed in the electrode mixture layer. .
  • the depth of the fine hole may be 80% to 90% of the depth of the electrode mixture layer corresponding to the depth formed from the surface portion in the vertical section toward the current collector.
  • the depth of the fine holes is less than 80% of the thickness of the corresponding electrode mixture layer, the depth of the fine holes is too low, so that the electrolyte cannot be easily diffused in the depth direction of the electrode mixture layer. It may not work.
  • a mold or a roller for forming a fine hole including a corresponding protrusion may be formed to form the fine holes.
  • an excessively high pressure may be applied to the electrode mixture layer portion located in the current collector direction end portion of the micro-holes, which causes the portion to be rolled to lower the porosity of the electrode mixture layer. Rather, there is a problem that the diffusion of the electrolyte can be reduced.
  • the fine holes are made to be indented into a horn shape whose diameter gradually decreases toward the current collector from the vertical cross-sectional surface, if the desired effect can be achieved, the planar structure is not significantly limited, in detail
  • the micro holes may be triangular, square, pentagonal, hexagonal, circular, semicircular, or elliptical in planar shape on the surface of the electrode mixture layer, and more specifically, uniform diffusion of an electrolyte and the process of forming the fine holes. Considering the uniform transmission of the pressure applied in the, it may be circular.
  • the fine holes may have an average diameter of 100 micrometers to 200 micrometers in the surface portion on the vertical cross section, and an average diameter of 20 micrometers to 50 micrometers in the inner end portion.
  • the average diameter of the micro holes in the surface portion on the vertical cross section is less than 100 micrometers, the diameter of the micro holes in the surface portion where the electrolyte starts to flow is too small, so that diffusion of the electrolyte through the micro holes may not be easy.
  • the average diameter of the fine holes in the surface portion on the vertical cross section exceeds 200 micrometers, the diameter of the fine holes in the surface portion is too large, rather, the capacity of the electrode may be lowered.
  • the projections of the mold or the roller for forming the fine holes in the electrode mixture layer become too thin, so that the fine holes are formed by pressing against the electrode mixture layer.
  • the average diameter at the inner end portion exceeds 50 micrometers, on the contrary, the protruding end of the metal mold or the roller for forming the micro holes is too large, and the electrode In the process of forming the fine holes by pressing against the mixture layer, the inner end portion may be rolled, and as a result, the porosity decreases at the inner end portion of the fine hole of the electrode mixture layer, rather the electrolyte diffusion decreases. Can be.
  • the inner end portion of the micro-holes may be formed in a circular arc shape in the vertical cross-section, so that the diameter of the inner end portion, in the end portion formed of the circular arc shape, the side edges of the fine holes made of a linear shape and the circular arc It means the diameter in the site where the end portion formed in the shape abuts.
  • the inner end portion of the fine hole has a needle-like structure, since the protrusion end of the micro-hole forming die or roller corresponding thereto must also have a very thin needle-like structure, in the pressing process by the mold or roller, As the protrusions are deformed, the minute holes may not be easily formed in the electrode mixture layer.
  • the plurality of fine holes may have a regular arrangement in planar shape at the surface portion of the electrode mixture layer.
  • the electrolyte solution can be more uniformly diffused to all parts of the electrode mixture layer, and the performance degradation due to the local diffusion difference of the electrolyte solution can be prevented.
  • the fine hole may have a structure having a shape in which the diameter decreases continuously or discontinuously from the vertical cross section surface toward the current collector.
  • the micro holes may have a shape having a shape of continuously decreasing diameter so that the micro holes may be more easily formed.
  • a predetermined pattern is formed on the electrode mixture layer while detaching a part of the electrode mixture layer using a laser so as to solve the problem of lowering of electrolyte diffusion of a conventional electrode having a high loading amount of the electrode mixture layer.
  • FIG. 1 schematically illustrates a vertical cross-sectional structure of an electrode in which patterned fine holes are formed in an electrode mixture layer using a conventional laser
  • FIG. 2 illustrates an enlarged structure of part “A” of FIG. 1. A schematic partial enlarged view is shown.
  • an electrode mixture layer 120 is formed on an upper surface of the current collector 110.
  • the plurality of fine holes 130 are formed in the electrode mixture layer 120 to form a predetermined pattern.
  • the diameter R1 is formed in a substantially uniform structure toward the current collector 110 from the surface of the electrode mixture layer 120 on a vertical cross section. have.
  • the fine holes 130 are in contact with the upper surface of the current collector (110).
  • the depth D1 is formed to be equal to the thickness T1 of the electrode mixture layer 120.
  • the present invention provides a device for manufacturing the secondary battery electrode to solve this problem
  • the device includes a mold for forming a fine hole;
  • the micro holes are formed in the mold for forming fine holes such that when one surface is pressed in a state facing the surface of the electrode mixture layer, horn-shaped fine holes indented toward the current collector from the surface portion of the electrode mixture layer may be formed.
  • Horn-shaped protrusions corresponding to the structure may protrude on one surface.
  • the apparatus includes a roller for forming fine holes;
  • the fine hole forming rollers may be formed such that when the outer surface is pressed against the surface of the electrode mixture layer in a rotational manner, horn-shaped fine holes indented toward the current collector from the surface of the electrode mixture layer may be formed. Horn-shaped protrusions corresponding to the structure may protrude to the outer surface.
  • the electrode manufacturing apparatus for a secondary battery according to the present invention may have a structure in which protrusions protruding from the mold or the roller press the electrode mixture layer to form fine holes.
  • the horn-shaped protrusions have an average diameter of 100 micrometers to 200 micrometers at an end portion having a relatively large diameter in a vertical cross section, and an average diameter of 20 micrometers at an end portion having a relatively small diameter. To 50 micrometers.
  • the electrolyte solution is easily impregnated in the depth direction of the electrode mixture layer, while preventing a decrease in capacity, the electrode at the inner end portion of the fine holes The phenomenon that a mixture layer rolls can be prevented easily.
  • the present invention also provides a method for manufacturing the secondary battery electrode, the method is
  • the fine holes of the electrode mixture layer may be formed by pressing the metal mold or roller for forming the hole.
  • the electrode mixture layer formed in the process b) may be a structure having a loading amount of 3.5 to 5.5 mAh / cm 2 and porosity of 25% to 35%.
  • the fine holes may prevent the lowering of the capacity of the electrode mixture layer while exhibiting an excellent effect of diffusion of the electrolyte solution in a structure in which the loading amount of the electrode mixture layer is high so as to maximize the capacity of the electrode.
  • the mold or roller may have a structure including minute hole forming protrusions formed in a shape corresponding to the horn-shaped fine holes at a portion facing the surface of the dried and rolled electrode mixture layer.
  • the fine holes of the electrode mixture layer may be formed by the metal hole forming protrusions formed in the metal mold or the roller, when the pressure is applied to the surface of the electrode mixture layer by a mold or roller, accordingly Unlike the conventional method of detaching some electrode mixture layers using a laser, a decrease in electrode capacity can be prevented, and a reduction in product defect rate and an increase in manufacturing cost that can occur due to scattering electrode mixture layer particles can be suppressed.
  • each of the horn-shaped projections by adjusting the particle diameter of the fine holes formed by the projections in the above range, while easily impregnating the electrolyte in the depth direction of the electrode mixture layer, while preventing a decrease in capacity
  • the diameter of each portion may be adjusted to a specific range, and in detail, each of the horn-shaped protrusions may have a relatively large vertical cross section. It may have a structure in which the average diameter at the end portion having the diameter is 100 micrometers to 200 micrometers, and the average diameter at the end portion having the relatively small diameter is 20 micrometers to 50 micrometers.
  • the electrode for secondary batteries according to the present invention is configured such that the electrode mixture layer includes a plurality of fine holes formed in a horn shape, the diameter of which gradually decreases from the surface in the vertical section toward the current collector.
  • the electrode mixture layer includes a plurality of fine holes formed in a horn shape, the diameter of which gradually decreases from the surface in the vertical section toward the current collector.
  • the electrolyte can be more easily diffused in the depth direction of the electrode mixture layer, thereby preventing the occurrence of lithium-plating phenomenon, despite the high loading amount of the electrode mixture layer, It is possible to prevent the electrical performance deterioration, in the process of charging and discharging, the smooth movement of lithium ions can be improved, the rapid charging performance can be improved, the fine holes are formed by a mold or a roller including protrusions corresponding to the fine holes Therefore, as compared with the conventional method of forming a pattern structure by using a laser, it is possible to prevent a decrease in capacitance of the electrode and There is an effect that can eliminate
  • FIG. 1 is a schematic diagram schematically showing a vertical cross-sectional structure of an electrode in which fine holes having a pattern shape are formed in an electrode mixture layer using a conventional laser;
  • FIG. 2 is a partially enlarged view schematically showing an enlarged structure of a portion “A” of FIG. 1;
  • FIG. 3 is a schematic diagram schematically showing a vertical cross-sectional structure of a secondary battery electrode according to an embodiment of the present invention
  • FIG. 4 is a partially enlarged view schematically showing an enlarged structure of part “B” of FIG. 3;
  • FIG. 5 is a partially enlarged view schematically showing an enlarged structure of a portion “C” of FIG. 4;
  • 6 and 7 are schematic diagrams illustrating a process of forming fine holes in the electrode mixture layer using the electrode manufacturing apparatus for a secondary battery according to another embodiment of the present invention.
  • Example 8 is a graph showing the negative electrode profile for the battery of Example 1 and Comparative Example.
  • FIG. 3 is a schematic diagram schematically showing a vertical cross-sectional structure of a secondary battery electrode according to one embodiment of the present invention
  • FIG. 4 is a partially enlarged view schematically showing an enlarged structure of part “B” of FIG. 3.
  • 5 is a partially enlarged view schematically showing an enlarged structure of a portion “C” of FIG. 3.
  • an electrode mixture layer 320 is formed on an upper surface of the current collector 310.
  • a plurality of fine holes 330 is formed in a structure having a regular arrangement.
  • the fine holes 330 are indented toward the current collector 310 from the vertical cross-sectional surface, and have a horn shape in which diameters R2 and R3 continuously decrease toward the current collector 310.
  • the fine hole 330 is formed such that the depth D2 formed from the surface portion toward the current collector 310 has a size of about 90% of the thickness T2 of the electrode mixture layer 320 corresponding thereto.
  • the fine holes 330 may have an average diameter R2 at the surface portion of 100 micrometers to 200 micrometers, and the average diameter R3 at the inner end portion 332 may be 20 micrometers to 50 micrometers. Can be done.
  • the fine hole 330 has a circular arc shape in which the inner end portion 332 is rounded in a vertical cross section, so that the average diameter R3 of the inner end portion 332 is formed in a straight shape. It means the average diameter R3 in the site
  • FIG. 6 and 7 schematically show a process of forming fine holes in the electrode mixture layer using the electrode manufacturing apparatus for a secondary battery according to another embodiment of the present invention.
  • an electrode manufacturing apparatus for a secondary battery includes a metal hole forming mold 640.
  • the horn-shaped protrusions 641 corresponding to the fine holes 630 protrude from one surface facing the surface of the electrode mixture layer 620.
  • the one surface of the fine hole forming mold 640 is pressed in a state facing the surface of the electrode mixture layer 620, so that the shape of the horn is indented from the surface portion of the electrode mixture layer 620 toward the current collector 610.
  • Fine holes 630 may be easily formed.
  • the fine hole forming mold 640 is separated from the electrode mixture layer 620.
  • an electrode manufacturing apparatus for a secondary battery includes a roller 740 for forming a fine hole.
  • the horn-shaped protrusions 741 corresponding to the fine holes 730 protrude from the outer surface facing the surface of the electrode mixture layer 720.
  • the outer surface of the fine hole forming roller 740 is rotated and pressed in a state facing the surface of the electrode mixture layer 720, the horn-shaped fine holes indented toward the current collector from the surface portion of the electrode mixture layer 720 730 can be easily formed.
  • the fine hole forming roller 740 is separated from the electrode mixture layer 720.
  • the pressure is applied while the mold for forming the micro holes having the horn-shaped protrusions is formed to face the surface of the negative electrode mixture layer, thereby forming a plurality of fine holes in the horn shape in the negative electrode mixture layer. Formed. At this time, the diameter of the microholes was 200 micrometers at the surface portion and 35 micrometers at the inner end portion.
  • Li (Ni 1/3 Co 1/3 Mn 1/3 ) O 2 is used as a positive electrode active material, and is mixed with carbon black and PVDF in distilled water at 96: 2: 2 to prepare a positive electrode slurry. It was. The positive electrode slurry was coated on aluminum foil to form a thin electrode plate, dried at 135 or more for 3 hours, and rolled to prepare a positive electrode.
  • ethylene carbonate and ethyl methyl carbonate were mixed at a vol% ratio of 3: 7, and LiPF 6 was added thereto at a concentration of 1.0 M.
  • vinylene carbonate, propane sultone and ethylene sulfate were added in an amount of 0.2% by weight based on the total amount of the electrolyte.
  • a battery was manufactured using the negative electrode, the positive electrode, and the electrolyte solution prepared above.
  • Celcel 2320 was used as a separator.
  • a battery was manufactured in the same manner as in Example 1, except that the loading amount of the negative electrode was changed to 3.7 mAh / cm 2 and the porosity was 34%.
  • a battery was manufactured in the same manner as in Example 1, except that the loading amount of the negative electrode was changed to 5.3 mAh / cm 2 and the porosity was changed to 27%.
  • a secondary battery was manufactured in the same manner as in Example, except that a negative electrode prepared by omitting the process of forming fine holes in the negative electrode mixture layer was used.
  • Example 8 analyzes the negative electrode profile for the cells of Example 1 and Comparative Example.
  • the negative electrode profile was identified by differentially extracting the negative electrode profile (1.5C charge) during charging through the three-electrode system and differentially graphing the potential value for the SOC.
  • A is the battery of Example 1
  • B is the point where the inclination of the battery is changed.
  • the battery according to Example 1 has a depth of charge about 7% deeper than that of the battery of Comparative Example, thereby preventing lithium plating. It can be seen that there is an effect.
  • Example 9 is a result of measuring the capacity of the batteries of Example 1 and Comparative Example. According to FIG. 9, the Example 1 cell appears to show little loss in capacity compared to the Comparative Example cell.
  • Example 1 Example 2
  • Example 3 Comparative example Lithium Precipitation X X X O
  • the electrode for secondary batteries of the present invention prevents the occurrence of lithium-plating phenomenon, despite the high loading amount of the electrode mixture layer, while having almost no loss of capacity compared to the electrode without the conventional fine holes. The performance degradation can be prevented.

Abstract

La présente invention concerne une électrode pour une batterie secondaire, comprenant une couche combinée d'électrode comprenant un matériau actif d'électrode formé sur un côté ou les deux côtés d'un collecteur de courant, la couche combinée d'électrode comprenant une pluralité de trous fins découpés à partir d'une surface transversale verticale vers le collecteur de courant, et chacun des trous fins a une forme de corne qui diminue progressivement en diamètre dans la direction allant de la surface de section transversale verticale vers le collecteur de courant.
PCT/KR2017/009079 2016-08-25 2017-08-21 Électrode pour batterie secondaire comprenant des trous fins WO2018038479A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201780004280.5A CN108292737B (zh) 2016-08-25 2017-08-21 具有细孔的二次电池用电极
EP17843899.0A EP3370280B1 (fr) 2016-08-25 2017-08-21 Électrode pour batterie secondaire comprenant des trous fins
US15/772,755 US10818929B2 (en) 2016-08-25 2017-08-21 Electrode for secondary battery having fine holes

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20160108048 2016-08-25
KR10-2016-0108048 2016-08-25
KR1020170101381A KR102054326B1 (ko) 2016-08-25 2017-08-10 미세 홀들을 포함하고 있는 이차전지용 전극
KR10-2017-0101381 2017-08-10

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WO2018038479A1 true WO2018038479A1 (fr) 2018-03-01

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109686918A (zh) * 2018-12-25 2019-04-26 遵化市清吉电池科技有限公司 一种锂离子电池极片及其制备方法
US20210050599A1 (en) * 2019-08-16 2021-02-18 Samsung Sdi Co., Ltd. High loading electrodes having high areal capacity and energy storage devices including the same
CN113991064A (zh) * 2021-10-09 2022-01-28 湖南立方新能源科技有限责任公司 一种厚电极结构及其制作方法

Citations (5)

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Publication number Priority date Publication date Assignee Title
JP2003017040A (ja) * 2001-06-28 2003-01-17 Sanyo Electric Co Ltd リチウム二次電池用電極の製造方法及びリチウム二次電池用電極
JP2012190625A (ja) * 2011-03-10 2012-10-04 Hitachi Ltd 非水二次電池
JP5572974B2 (ja) * 2009-03-24 2014-08-20 セイコーエプソン株式会社 固体二次電池の製造方法
KR20150051046A (ko) * 2013-11-01 2015-05-11 주식회사 엘지화학 전극의 표면에 패턴을 형성하는 방법, 이 방법을 이용해 제조된 전극 및 이 전극을 포함하는 이차전지
WO2016039264A1 (fr) * 2014-09-10 2016-03-17 三菱マテリアル株式会社 Électrode positive pour cellule secondaire au lithium-ion et, cellule secondaire au lithium-ion

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003017040A (ja) * 2001-06-28 2003-01-17 Sanyo Electric Co Ltd リチウム二次電池用電極の製造方法及びリチウム二次電池用電極
JP5572974B2 (ja) * 2009-03-24 2014-08-20 セイコーエプソン株式会社 固体二次電池の製造方法
JP2012190625A (ja) * 2011-03-10 2012-10-04 Hitachi Ltd 非水二次電池
KR20150051046A (ko) * 2013-11-01 2015-05-11 주식회사 엘지화학 전극의 표면에 패턴을 형성하는 방법, 이 방법을 이용해 제조된 전극 및 이 전극을 포함하는 이차전지
WO2016039264A1 (fr) * 2014-09-10 2016-03-17 三菱マテリアル株式会社 Électrode positive pour cellule secondaire au lithium-ion et, cellule secondaire au lithium-ion

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109686918A (zh) * 2018-12-25 2019-04-26 遵化市清吉电池科技有限公司 一种锂离子电池极片及其制备方法
US20210050599A1 (en) * 2019-08-16 2021-02-18 Samsung Sdi Co., Ltd. High loading electrodes having high areal capacity and energy storage devices including the same
CN113991064A (zh) * 2021-10-09 2022-01-28 湖南立方新能源科技有限责任公司 一种厚电极结构及其制作方法

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