WO2015099324A1 - 리튬 이차 전지용 음극판 - Google Patents
리튬 이차 전지용 음극판 Download PDFInfo
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- WO2015099324A1 WO2015099324A1 PCT/KR2014/012086 KR2014012086W WO2015099324A1 WO 2015099324 A1 WO2015099324 A1 WO 2015099324A1 KR 2014012086 W KR2014012086 W KR 2014012086W WO 2015099324 A1 WO2015099324 A1 WO 2015099324A1
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- negative electrode
- electrode plate
- lithium secondary
- secondary battery
- silicon
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- 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
- H01M4/134—Electrodes based on metals, Si or alloys
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- H01M10/052—Li-accumulators
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- H01M10/00—Secondary cells; Manufacture thereof
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- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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- 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
- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
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- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
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- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/386—Silicon or alloys based on silicon
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
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- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
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- 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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- 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
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- H—ELECTRICITY
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- 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
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- 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
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
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- H—ELECTRICITY
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
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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
Definitions
- the present invention relates to a negative electrode plate for a lithium secondary battery, and more particularly, to a negative electrode plate for a lithium secondary battery having high electrode plate capacity and excellent efficiency.
- Lithium metal is used as a negative electrode active material of a conventional lithium battery.
- a carbon-based material is frequently used as a negative electrode active material instead of lithium metal because a battery short circuit occurs due to dendrite formation. .
- Examples of the carbon-based active material include crystalline carbon such as natural graphite and artificial graphite, and amorphous carbon such as soft carbon and hard carbon.
- crystalline carbon such as natural graphite and artificial graphite
- amorphous carbon such as soft carbon and hard carbon.
- Graphite is typically used as the crystalline carbon, and has a theoretical limit capacity of 372 mAh / g, which has a high capacity, and is used as a negative electrode active material.
- a material that is currently being actively researched is a negative electrode active material using a silicon alloy. Silicon has a high energy density and high energy density, and can absorb and release more lithium ions than a negative electrode active material using a carbon-based material, thereby manufacturing a secondary battery having a high capacity and a high energy density.
- a binder or the like essentially used for manufacturing a negative electrode plate causes an irreversible reaction, thereby lowering the capacity, initial efficiency, and lifespan characteristics of the negative electrode plate.
- An object of the present invention is to provide a negative electrode plate for a lithium secondary battery that can implement a secondary battery having a high capacity and excellent initial efficiency.
- An object of the present invention is to provide a negative electrode plate for a lithium secondary battery that can implement a secondary battery with improved life characteristics.
- a negative electrode plate for a rechargeable lithium battery includes a negative electrode active material including a silicon (Si) alloy; bookbinder; And a single wall carbon nanotube (SWCNT) dispersion, wherein the ratio of the SWCNT dispersion to the silicon (Si) alloy included in the negative electrode plate for the lithium secondary battery is 800 to 3 to 20 to 1.
- the ratio of SWCNT dispersion may be 160 to 1 to 80 to 3.
- the silicon (Si) in the silicon (Si) alloy may be included in 40 at% to 70 at%.
- the negative electrode active material may further include graphite.
- the binder may be included in 1 to 10 at% in the negative electrode plate for a lithium secondary battery.
- the negative electrode plate for a lithium secondary battery may further comprise a 0.01 to 2 at% thickener.
- the negative electrode plate for a lithium secondary battery may further comprise 0.01 to 5 at% of a conductive agent.
- the present invention has the effect of realizing a secondary battery having a high capacity and excellent initial efficiency.
- the present invention has the effect of realizing a secondary battery with improved life characteristics.
- FIG. 1 is a table comparing the component ratios of the negative electrode plate for a lithium secondary battery of Example 1 and the negative electrode plate for a lithium secondary battery of Comparative Example 1.
- FIG. 1 is a table comparing the component ratios of the negative electrode plate for a lithium secondary battery of Example 1 and the negative electrode plate for a lithium secondary battery of Comparative Example 1.
- FIG. 2 is a table comparing components ratios of the negative electrode plate for a lithium secondary battery of Example 2 and the negative electrode plate for a lithium secondary battery of Comparative Example 2.
- FIG. 2 is a table comparing components ratios of the negative electrode plate for a lithium secondary battery of Example 2 and the negative electrode plate for a lithium secondary battery of Comparative Example 2.
- Example 3 is a table showing the electrode plate capacity, active material capacity and initial efficiency for the negative electrode plates for lithium secondary batteries prepared in Example 1 and Comparative Example 1.
- FIG. 4A to 4C are graphs illustrating life characteristics of the negative electrode plates for lithium secondary batteries prepared in Example 1 and Comparative Example 1.
- FIG. 4A to 4C are graphs illustrating life characteristics of the negative electrode plates for lithium secondary batteries prepared in Example 1 and Comparative Example 1.
- 5A to 5C are graphs illustrating life characteristics of the negative electrode plates for lithium secondary batteries prepared in Example 2 and Comparative Example 2.
- FIG. 5A to 5C are graphs illustrating life characteristics of the negative electrode plates for lithium secondary batteries prepared in Example 2 and Comparative Example 2.
- a negative electrode plate for a rechargeable lithium battery includes a negative electrode active material including a silicon (Si) alloy; bookbinder; And a single wall carbon nanotube (SWCNT) dispersion, wherein the ratio of the SWCNT dispersion to the silicon (Si) alloy included in the negative electrode plate for the lithium secondary battery is 800 to 3 to 20 to 1.
- each of the features of the various embodiments of the present invention may be combined or combined with each other in part or in whole, various technically interlocking and driving as can be understood by those skilled in the art, each of the embodiments may be implemented independently of each other It may be possible to carry out together in an association.
- the term “approximately” is used at or near that value when a manufacturing and material tolerance inherent in the stated meaning is given and is intended to be an accurate or absolute value to aid the understanding of the present invention. Is used to prevent unfair use by unscrupulous infringers.
- the present invention provides a negative electrode plate for a lithium secondary battery, comprising a negative electrode active material, a binder, and a single-walled carbon nanotube (SWCNT) dispersion containing a silicon (Si) alloy.
- a negative electrode plate for a lithium secondary battery comprising a negative electrode active material, a binder, and a single-walled carbon nanotube (SWCNT) dispersion containing a silicon (Si) alloy.
- the silicon (Si) alloy is a negative electrode active material, and may be involved in occlusion and release of lithium ions.
- Silicon (Si) alloy is an alloy containing silicon (Si), and the kind is not specifically limited. Silicon (Si) alloys basically include silicon (Si), aluminum (Al), nickel (Ni), cobalt (Co), iron (Fe), copper (Cu), chromium (Cr), zirconium (Zr) , Titanium (Ti), manganese (Mn) may be an alloy further comprising one or more elements. Silicon (Si) may be included in the silicon (Si) alloy at 40 at% to 70 at%.
- the binder may play a role of increasing the bonding force between the components constituting the negative electrode plate for a lithium secondary battery.
- the binder may be a styrene-butadiene rubber (SBR) -based binder, but is not limited thereto.
- the binder may be included in the negative electrode plate for a lithium secondary battery at 1 to 10 at%, but is not limited thereto.
- Single-walled carbon nanotube (SWCNT) dispersion is contained in a small amount (specifically, so that the ratio of silicon (Si) alloy to SWCNT dispersion is 800 to 3 to 20 to 1) in the negative electrode plate for a lithium secondary battery, so that the capacity of the negative electrode plate for a lithium secondary battery It can also play a role in improving the initial efficiency and lifetime characteristics.
- Carbon nanotubes have a (CNT) graphite sheet rounded to a nanometer diameter and may have various structures depending on the angle and shape of the graphite surface being curled.
- Single-walled carbon nanotubes refer to carbon nanotubes (CNTs) in which the graphite sheet consists of one layer and can be distinguished from multi-walled carbon nanotubes (MWCNTs) in which the graphite sheet consists of several layers.
- the rate at which the single-walled carbon nanotube (SWCNT) dispersion is added to the negative electrode plate for the lithium secondary battery may vary depending on the rate at which the silicon (Si) alloy is added to the negative electrode plate for the lithium secondary battery. Specifically, when the addition ratio of the silicon (Si) alloy is increased, the addition ratio of the single-walled carbon nanotube (SWCNT) dispersion may also be increased, and when the addition ratio of the silicon (Si) alloy is decreased, the single wall The addition rate of the carbon nanotube (SWCNT) dispersion can also be reduced together.
- the ratio of the single-walled carbon nanotube (SWCNT) dispersion to the silicon (Si) alloy included in the negative electrode plate for the lithium secondary battery is 800 to 3 to 20 to 1, preferably 160 to 1 to 80 to 3.
- the silicon (Si) alloy is mixed at a ratio of 8 at%
- the single wall carbon nanotube (SWCNT) dispersion is at a ratio of 0.03 at% to 0.4 at%, preferably 0.05 at% to 0.3 at% Can be mixed in proportions.
- the negative electrode active material may further include graphite in addition to the silicon (Si) alloy. Graphite may be involved in the occlusion and release of lithium ions as a negative electrode active material.
- the ratio of graphite to the silicon (Si) alloy included in the negative electrode active material is not particularly limited, and the silicon (Si) alloy and graphite may be mixed in various ratios according to the implementation method.
- the negative electrode plate for the lithium secondary battery may optionally further include a thickener of 0.01 to 2 at%.
- the thickener may play a role of increasing the viscosity of the components constituting the negative electrode plate for the lithium secondary battery.
- the thickener may be a carboxymethyl cellulose (CMC) thickener, but is not necessarily limited thereto.
- the negative electrode plate for the lithium secondary battery may optionally further include 0.01 to 5 at% of a conductive agent.
- the conductive agent may play a role of improving the electrical conductivity of the negative electrode plate for the lithium secondary battery.
- the method of manufacturing the negative electrode plate of the present invention is not particularly limited, and the negative electrode plate may be manufactured using various negative electrode plate manufacturing methods generally known in the art.
- Example 1 after the production of a silicon (Si) alloy having a composition of Si 50 (Cu 50 Al 50 ) 45 Fe 5 , the silicon (Si) alloy in a ratio of 8 at%, CMC-based thickener 1 At the rate of at%, SBR-based binder is mixed at the rate of 2 at%, graphite is mixed at the remaining rate, and 0.03 at% to 0.3 at% of single wall carbon nanotube (SWCNT) dispersion is further mixed, and A negative electrode plate for secondary batteries was prepared.
- Si silicon
- CMC-based thickener 1 At the rate of at%, SBR-based binder is mixed at the rate of 2 at%, graphite is mixed at the remaining rate, and 0.03 at% to 0.3 at% of single wall carbon nanotube (SWCNT) dispersion is further mixed, and A negative electrode plate for secondary batteries was prepared.
- Example 2 after preparing a silicon (Si) alloy having a composition of Si 50 (Cu 50 Al 50 ) 45 Fe 5 , the silicon (Si) alloy in a ratio of 5.8 at%, CMC-based thickener 1 At the rate of at%, SBR-based binder is mixed at the rate of 2 at%, graphite is mixed at the remaining rate, and 0.03 at% to 0.10 at% of the single wall carbon nanotube (SWCNT) dispersion is further mixed to form a lithium secondary. A negative electrode plate for batteries was prepared.
- Comparative Example 1 Si 50 (Cu 50 Al 50) 45 Fe 5 composition having silicon (Si) manufacturing the alloy, and the silicon (Si) alloy in a ratio of 5.8 at%, the thickening agents of the CMC Series 1 at% At a ratio of 2 at% to SBR and at a ratio of graphite to the remainder, without mixing single-wall carbon nanotube (SWCNT) dispersions at all, and at 0.01 and 0.5 at%
- the single-walled carbon nanotube (SWCNT) dispersion of was further mixed to prepare a negative electrode plate for a lithium secondary battery.
- a silicon (Si) alloy having a composition of Si 50 (Cu 50 Al 50 ) 45 Fe 5 was prepared, and the silicon (Si) alloy was 5.8 at%, and the CMC-based thickener was 1 at%.
- SWCNT single wall carbon nanotube
- Nanotube (SWCNT) dispersion was further mixed to prepare a negative electrode plate for a lithium secondary battery.
- FIG. 1 is a table comparing the component ratios of the negative electrode plate for a lithium secondary battery of Example 1 and the negative electrode plate for a lithium secondary battery of Comparative Example 1.
- FIG. 1 is a table comparing the component ratios of the negative electrode plate for a lithium secondary battery of Example 1 and the negative electrode plate for a lithium secondary battery of Comparative Example 1.
- FIG. 2 is a table comparing components ratios of the negative electrode plate for a lithium secondary battery of Example 2 and the negative electrode plate for a lithium secondary battery of Comparative Example 2.
- FIG. 2 is a table comparing components ratios of the negative electrode plate for a lithium secondary battery of Example 2 and the negative electrode plate for a lithium secondary battery of Comparative Example 2.
- the negative electrode plate for the lithium secondary battery of Example 1-1 (the negative electrode plate having a ratio of SWCNT dispersion to the silicon (Si) alloy of 800 to 3) of the negative electrode plate for the lithium secondary battery of Comparative Examples 1-1 and 1-2
- it shows excellent electrode plate capacity and efficiency as compared to the (cathode plate with no SWCNT dispersion added and the ratio of SWCNT dispersion to silicon (Si) alloy being 800 to 1).
- the SWCNT dispersion is added to improve the electrode plate capacity and efficiency so that the ratio of the SWCNT dispersion to the silicon (Si) alloy is at least 800 to 3.
- the negative electrode plates for the lithium secondary batteries of Examples 1-2, 1-3, and 1-4 commonly exhibit excellent electrode plate capacity and initial efficiency.
- the negative electrode plate for the lithium secondary battery of Comparative Example 1-3 compared with the negative electrode plate for the lithium secondary battery of Example 1-4 (the negative electrode plate having a ratio of SWCNT dispersion to the silicon (Si) alloy of 80 to 3) It can be seen that the electrode plate capacity and initial efficiency of the negative electrode plate having a ratio of SWCNT dispersion to the silicon (Si) alloy is 16 to 1) are lowered. From this fact, it can be seen that when the ratio of SWCNT dispersion to silicon (Si) alloy exceeds approximately 20 to 1, the electrode plate capacity and efficiency are rather deteriorated. Without being limited by theory, it appears that when the ratio of SWCNT dispersion to silicon (Si) alloy exceeds approximately 20 to 1, the irreversibility of the components constituting the negative electrode plate is increased, leading to a decrease in the electrode plate capacity and efficiency.
- the ratio of SWCNT dispersion to silicon (Si) alloy should be at least 800 to 3 to 20 to 1, preferably 160 to 1 to 80 to 3, so that the capacity and initial stage of the negative electrode plate for a lithium secondary battery It can be seen that the efficiency can be improved.
- Cycle life characteristics of the negative electrode plates for lithium secondary batteries prepared in Examples 1 and 2 and Comparative Examples 1 and 2 were measured. Specifically, the cycle life characteristics were measured by repeating charging and discharging 50 times at 0.5 C with respect to the negative electrode plates of the coin-shaped lithium secondary batteries prepared in Examples 1 and 2 and Comparative Examples 1 and 2.
- the charge and discharge method was performed according to the charge and discharge method for the active material for a lithium secondary battery generally known in the art. The results are shown in FIGS. 4A-4C and 5A-5C.
- FIG. 4A the life characteristics of the negative electrode plates of Examples 1-1 and 1-2 and Comparative Examples 1-2 are shown in FIG. 4A
- the negative electrode plates of Examples 1-3 and 1-4 and Comparative Examples 1-3 are shown in FIG. 4B
- 4c shows the life characteristics of the negative electrode plate of Comparative Example 1-1.
- the life characteristics of the negative electrode plate of Example 2-1 in FIG. 5A the life characteristics of the negative electrode plates of Examples 2-2 and 2-3 and Comparative Example 2-2 in FIG. 5B, and Comparative Example 2 in FIG.
- the lifetime characteristics for the negative plate of ⁇ 1 are shown.
- the negative electrode plate of Comparative Example 1-1 (the negative electrode plate without the SWCNT dispersion added) and the negative electrode plate of Comparative Example 1-2 (the negative electrode plate having the ratio of SWCNT dispersion to the silicon (Si) alloy of 800 to 1).
- the lifespan characteristics of each other are almost the same, but the negative electrode plate of Example 1-1 (the negative electrode plate having the ratio of SWCNT dispersion to the silicon (Si) alloy of 800 to 3) has almost no difference in capacity even after 50 charge / discharge cycles. It can be seen that the properties are significantly improved compared to the negative electrode plates of Comparative Examples 1-1 and 1-2.
- the negative electrode plates (the negative electrode plates having a ratio of SWCNT dispersion to silicon (Si) alloys of 800 to 3 to 80 to 3) of Examples 1-2, 1-3, and 1-4 generally exhibit excellent life characteristics. Can be.
- the negative electrode plate (composite plate of the ratio of the SWCNT dispersion to the silicon (Si) alloy of 16 to 1 of Comparative Example 1-3) also shows excellent life characteristics.
- the negative electrode plate of Comparative Example 2-1 negative plate without addition of SWCNT dispersion
- the negative electrode plate of Comparative Example 2-2 negative plate of SWCNT dispersion ratio to silicon (Si) alloy is 580 to 1).
- the lifespan characteristics of each other are almost the same, but the negative electrode plate of Example 2-1 (negative plate of SWCNT dispersion ratio to silicon (Si) alloy is 580 to 3) has almost no difference in capacity even after 50 charge / discharge cycles. It can be seen that the properties are significantly improved compared to the negative electrode plates of Comparative Examples 2-1 and 2-2.
- the negative electrode plates of Example 2-2 and 2-3 the negative electrode plates having a ratio of SWCNT dispersion to silicon (Si) alloys of 116 to 1 to 58 to 1) commonly exhibit excellent life characteristics.
- the ratio of the SWCNT dispersion to the silicon (Si) alloy should be at least 800 to 3 or more, preferably 160 to 1 or more, thereby improving the life characteristics of the negative electrode plate for the lithium secondary battery. Can be.
- the ratio of SWCNT dispersion to silicon (Si) alloy is at least 800 to 3 to 20 to 1, preferably 160 to 1 to 80 to 3 It can be seen that the capacity, initial efficiency, and lifetime characteristics of the negative electrode plate for the lithium secondary battery are all improved (although the lifetime characteristics can be improved even if the ratio of the SWCNT dispersion to the silicon (Si) alloy is 20 to 1 or more). And since the initial efficiency is lowered, it can be seen that the ratio of the SWCNT dispersion to the silicon (Si) alloy is preferably 20 to 1 or less).
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Abstract
Description
Claims (7)
- 실리콘 (Si) 합금을 포함하는 음극 활물질;바인더; 및단일벽 탄소 나노 튜브 (SWCNT) 분산액을 포함하며,상기 리튬 이차 전지용 음극판에 포함되는 상기 실리콘 (Si) 합금에 대한 상기 SWCNT 분산액의 비율은 800 대 3 내지 20 대 1인 것을 특징으로 하는, 리튬 이차 전지용 음극판.
- 제1 항에 있어서,상기 리튬 이차 전지용 음극판에 포함되는 상기 실리콘 (Si) 합금에 대한 상기 SWCNT 분산액의 비율은 160 대 1 내지 80 대 3인 것을 특징으로 하는, 리튬 이차 전지용 음극판.
- 제1 항에 있어서,상기 실리콘 (Si) 합금에 실리콘 (Si) 은 40 at% 내지 70 at%로 포함되는 것을 특징으로 하는, 리튬 이차 전지용 음극판.
- 제1 항에 있어서,상기 음극 활물질은 흑연을 더 포함하는 것을 특징으로 하는, 리튬 이차 전지용 음극판.
- 제1 항에 있어서,상기 바인더는 상기 리튬 이차 전지용 음극판에 1 내지 10 at%로 포함되는 것을 특징으로 하는, 리튬 이차 전지용 음극판.
- 제1 항에 있어서,상기 리튬 이차 전지용 음극판은 0.01 내지 2 at%의 점증제를 더 포함하는 것을 특징으로 하는, 리튬 이차 전지용 음극판.
- 제1 항에 있어서,상기 리튬 이차 전지용 음극판은 0.01 내지 5 at%의 도전제를 더 포함하는 것을 특징으로 하는, 리튬 이차 전지용 음극판.
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CN201480071093.5A CN105849946A (zh) | 2013-12-24 | 2014-12-09 | 用于锂二次电池的阴极板 |
JP2016543067A JP2017501546A (ja) | 2013-12-24 | 2014-12-09 | リチウム二次電池用負極板 |
US15/104,379 US20160365565A1 (en) | 2013-12-24 | 2014-12-09 | Negative plate for lithium secondary battery |
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KR10-2013-0163121 | 2013-12-24 | ||
KR1020130163121A KR20150074903A (ko) | 2013-12-24 | 2013-12-24 | 리튬 이차 전지용 음극활물질층용 조성물 |
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JP (1) | JP2017501546A (ko) |
KR (1) | KR20150074903A (ko) |
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KR20210001708A (ko) * | 2019-06-28 | 2021-01-06 | 주식회사 엘지화학 | 음극 및 이를 포함하는 이차전지 |
WO2021085255A1 (ja) * | 2019-10-28 | 2021-05-06 | 株式会社村田製作所 | 二次電池用負極および二次電池 |
CN115989594A (zh) * | 2020-08-31 | 2023-04-18 | 松下知识产权经营株式会社 | 非水电解质二次电池 |
US20240120553A1 (en) * | 2021-01-29 | 2024-04-11 | Panasonic Energy Co., Ltd | Non-aqueous electrolyte secondary battery |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20070027438A (ko) * | 2005-09-06 | 2007-03-09 | 주식회사 엘지화학 | 탄소 나노튜브 함유 복합체 바인더 및 이를 포함하는 리튬이차전지 |
KR20080030699A (ko) * | 2006-10-02 | 2008-04-07 | 주식회사 엘지화학 | 도전성을 부여한 복합체 바인더 및 이를 포함하고 있는이차전지 |
KR20080091883A (ko) * | 2007-04-10 | 2008-10-15 | 한국과학기술원 | 고용량 리튬 이차전지용 전극 및 이를 함유하는 리튬이차전지 |
KR101113976B1 (ko) * | 2010-10-27 | 2012-03-13 | 한국과학기술연구원 | 자기조립된 전극 활물질-탄소 나노튜브 복합체와 그 제조 방법 및 이를 포함하는 이차전지 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5030414B2 (ja) * | 2004-11-15 | 2012-09-19 | パナソニック株式会社 | 非水電解質二次電池 |
US7955735B2 (en) * | 2004-11-15 | 2011-06-07 | Panasonic Corporation | Non-aqueous electrolyte secondary battery |
JP5200339B2 (ja) * | 2006-06-16 | 2013-06-05 | パナソニック株式会社 | 非水電解質二次電池 |
FR2935546B1 (fr) * | 2008-09-02 | 2010-09-17 | Arkema France | Materiau composite d'electrode, electrode de batterie constituee dudit materiau et batterie au lithium comprenant une telle electrode. |
US20100288077A1 (en) * | 2009-05-14 | 2010-11-18 | 3M Innovative Properties Company | Method of making an alloy |
JPWO2012147647A1 (ja) * | 2011-04-27 | 2014-07-28 | 新神戸電機株式会社 | リチウムイオン二次電池 |
KR20160016893A (ko) * | 2013-05-30 | 2016-02-15 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | 전극 조성물, 전기화학 전지 및 전기화학 전지의 제조방법 |
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- 2014-12-09 WO PCT/KR2014/012086 patent/WO2015099324A1/ko active Application Filing
- 2014-12-09 US US15/104,379 patent/US20160365565A1/en not_active Abandoned
- 2014-12-09 CN CN201480071093.5A patent/CN105849946A/zh active Pending
- 2014-12-09 JP JP2016543067A patent/JP2017501546A/ja active Pending
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20070027438A (ko) * | 2005-09-06 | 2007-03-09 | 주식회사 엘지화학 | 탄소 나노튜브 함유 복합체 바인더 및 이를 포함하는 리튬이차전지 |
KR20080030699A (ko) * | 2006-10-02 | 2008-04-07 | 주식회사 엘지화학 | 도전성을 부여한 복합체 바인더 및 이를 포함하고 있는이차전지 |
KR20080091883A (ko) * | 2007-04-10 | 2008-10-15 | 한국과학기술원 | 고용량 리튬 이차전지용 전극 및 이를 함유하는 리튬이차전지 |
KR101113976B1 (ko) * | 2010-10-27 | 2012-03-13 | 한국과학기술연구원 | 자기조립된 전극 활물질-탄소 나노튜브 복합체와 그 제조 방법 및 이를 포함하는 이차전지 |
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CN105849946A (zh) | 2016-08-10 |
JP2017501546A (ja) | 2017-01-12 |
US20160365565A1 (en) | 2016-12-15 |
KR20150074903A (ko) | 2015-07-02 |
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