Titles:
Negative electrode active material for lithium ion secondary battery, negative electrode for lithium ion secondary battery, and lithium ion secondary battery
リチウムイオン二次電池用負極活物質、リチウムイオン二次電池用負極及びリチウムイオン二次電池
Abstracts:
Provided is a negative electrode active material for a lithium ion secondary battery that can improve the initial discharge capacity and high-temperature storage characteristics of the lithium ion secondary battery. A negative electrode active material for a lithium ion secondary battery includes silicon oxide particles 20 in which carbon 10 is present on part or all of the surface, and a CuKα ray having a wavelength of 0.15406 nm is used as a radiation source. The ratio of the X-ray diffraction peak intensity of 2θ = 27 ° to 29 ° derived from Si to the X-ray diffraction peak intensity of 2θ = 20 ° to 25 ° derived from SiO 2 (PSi / PSiO 2) is 1.0 to 2. The specific surface area calculated from carbon dioxide adsorption at 273 K is 8.5 m 2 / g or less. [Selection] Figure 1
Titles:
Carbon-coated Al-containing silicon material
炭素被覆Ａｌ含有シリコン材料
Abstracts:
A new silicon material for providing a secondary battery with excellent performance is provided. An Al-containing silicon material in which Al mass% (WAl%) satisfies 0 <WAl <1 and Si mass% (WSi%) satisfies 60 ≦ WSi ≦ 90, and the Al-containing silicon material is coated. A carbon-coated Al-containing silicon material, wherein a peak derived from a silicon crystal is not measured in an analysis with a Raman spectrophotometer. [Selection figure] None
Titles:
Silicon-containing structure preparing method thereof carbon composite using the same electrode including the same lithium battery including the same and device including the same
실리콘 함유 구조체, 그 제조방법, 이를 이용한 탄소 복합체, 이를 포함한 전극, 리튬 전지, 및 소자
Abstracts:
Silicon-containing composite comprising porous silicon secondary particles; And a carbon-based coating film including a first amorphous carbon disposed on the silicon-containing composite, wherein the silicon-containing composite contains a second amorphous carbon such that the density of the silicon-containing composite is greater than that of the carbon-based coating film. Is equal to or less than the density of the silicon composite secondary particles, the silicon composite primary particles comprising an aggregate of two or more silicon composite primary particles, the silicon composite primary particles comprising silicon; At least one surface of the silicon suboxide (SiOx) (O <x <2) and at least one surface of the silicon suboxide; and a second carbon on at least one surface of the porous silicon secondary particles. Silicon-containing structures containing flakes, methods for their preparation, carbon composites using the same, electrodes, lithium batteries, and devices comprising the same are presented.
다공성 실리콘 이차입자를 포함하는 실리콘 함유 복합체; 및 상기 실리콘 함유 복합체의 상부에 배치된 제1비정질 탄소를 포함하는 탄소계 코팅막을 포함하는 실리콘 함유 구조체이며, 상기 실리콘 함유 복합체는 제2비정질 탄소를 함유하여 실리콘 함유 복합체의 밀도가 상기 탄소계 코팅막의 밀도와 동일하거나 또는 낮고, 상기 실리콘 복합체 이차 입자는 두 개 이상의 실리콘 복합체 일차 입자의 응집체를 포함하며, 상기 실리콘 복합체 일차 입자는 실리콘; 상기 실리콘의 적어도 일면상의 실리콘 서브옥사이드(SiOx)(O<x<2) 및 상기 실리콘 서브옥사이드의 적어도 일 면상의 제1탄소 플레이크를 포함하며, 상기 다공성 실리콘 이차입자의 적어도 일면상에 제2탄소 플레이크를 함유하는 실리콘 함유 구조체, 그 제조방법, 이를 이용한 탄소 복합체, 이를 포함한 전극, 리튬 전지, 및 소자가 제시된다.
Titles:
Active material for an anode and a secondary battery comprising the same
리튬 이차전지용 음극 활물질, 이를 포함하는 음극 및 상기 음극을 포함하는 리튬 이온 이차 전지
Abstracts:
The present invention relates to a negative electrode active material for solving the above problems. A first aspect of the invention relates to the negative electrode active material, wherein the negative electrode active material comprises a core-shell structured composite particle (s) having a core portion and a shell portion covering at least a portion of the surface of the core portion, wherein the core portion A matrix comprising a metal (M) -silicon composite oxide; And a plurality of crystalline silicon phases dispersed and interspersed in the matrix, wherein the shell portion comprises a carbon material, wherein the composite particles have one or more pores in and on the surface of the particles, and are subject to nitrogen adsorption. The volume of pores calculated by Barrett-Joyner-Halenda (BJH) is 1.5 × 10 cm / g to 10.0 × 10 cm / g.
본 발명은 상기 과제를 해결하기 위한 음극 활물질에 대한 것이다. 본 발명의 제1 측면은 상기 음극 활물질에 대한 것으로서, 상기 음극 활물질은 코어부와 상기 코어부의 적어도 일부 표면을 피복하는 쉘부를 갖는 코어-쉘 구조의 복합 입자(들)를 포함하며, 상기 코어부는 금속(M)-규소 복합 산화물을 포함하는 매트릭스; 및 상기 매트릭스 내에 분산되어 점재하는 복수의 결정질 규소상을 포함하고, 상기 쉘부는 탄소 재료를 포함하며, 상기 복합 입자는 입자의 내부 및 표면에 하나 이상의기공이 존재하며, 질소 흡착(Nsorption)에 따른 BJH (Barrett-Joyner-Halenda)에 의해 계산된 기공의 부피가 1.5X10cm/g 내지 10.0 X 10cm/g인 것이다.
Titles:
NEGATIVE ELECTRODE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY AND RECHARGEABLE LITHIUM BATTERY INCLUDING THE SAME
리튬 이차 전지용 음극 활물질 및 이를 포함하는 리튬 이차 전지
Abstracts:
The present invention includes a porous silicon-carbon composite, hard carbon, and coal-based pitch, wherein the non-graphitized carbon and the coal-based pitch are dispersed between pores of the porous silicon-carbon composite, The non-graphitizable carbon originates from an aqueous binder, and the porosity of the negative electrode active material relates to a negative electrode active material for a lithium secondary battery that is 26% by volume or less based on the total volume of the negative electrode active material.
본 발명은, 다공성 실리콘-탄소 복합체, 난흑연화 탄소(hard carbon), 및 석탄계 핏치를 포함하고, 상기 난흑연화 탄소 및 상기 석탄계 핏치는, 상기 다공성 실리콘-탄소 복합체의 기공 사이에 분산되고, 상기 난흑연화 탄소는 수계 바인더로부터 기인한 것이며, 음극 활물질의 기공도는, 음극 활물질 전체 부피를 기준으로, 26 부피% 이하인 리튬 이차 전지용 음극 활물질에 관한 것이다.
Applicants:
POSCO [KR] (주식회사 포스코)
RES INST IND SCIENCE & TECH [KR] (재단법인 포항산업과학연구원)
Inventors:
YOU SEUNG JAE [KR] (유승재)
WOO JUNG GYU [KR] (우정규)
KANG EUN TAE [KR] (강은태)
Titles:
SILICON-BASED POWDER, ELECTRODE AND BATTERY COMPRISING SUCH A POWDER
SILICIUMBASIERTES PULVER, ELEKTRODE UND BATTERIE MIT SOLCH EINEM PULVER
Abstract:
Silicon-based powder for use in the negative electrode of a battery, whereby the silicon-based powder comprises silicon-based particles, whereby the silicon-based particles have a number-based particle size distribution having a d50, whereby the particle size of a particle is considered to be the largest dimension of said particle, whereby less than 8.0% of the particles have a size which is larger than twice the d50. Such a silicon based powder may be embedded in a matrix to form an active material powder. Preferably d50 < 150nm and d10 > 10nm. The cycle efficiency of a negative electrode of a battery, made using such a powder, is much improved.
Applicant:
UMICORE NV [BE]
Inventors:
PUT STIJN [BE]
MARX NICOLAS [BE]
GILLEIR JAN [BE]
NELIS DANIËL [BE]
Other family members:
WO 2019154787 A1,
Pub. Date: 2019-08-15,
EPO Reference
Titles:
Silicon carbon secondary particle material for lithium ion battery and preparation method thereof
一种锂离子电池用硅碳二次颗粒材料及其制备方法
Abstracts:
The invention relates to a silicon carbon secondary particle material for a lithium ion battery and a preparation method thereof. The silicon carbon composite material is a secondary particle doped with copper element, and the secondary particle is compounded by a silicon material, a conductive additive and carbon. Inside the secondary particles, the carbon conductive agent forming the conductive network is uniformly dispersed with the primary silicon particles, and the secondary particles may be coated with a layer of carbon or not coated with carbon. Compared with the conventional silicon carbon negative electrode, the silicon carbon composite material prepared by the invention exhibits high coulombic efficiency and capacity for the lithium ion battery, and has relatively low electrochemical polarization effect, which significantly improves the energy density of the lithium ion battery. , rate performance and cycle performance. The preparation process of the invention has the advantages of simple preparation process and easy realization of industrial production.
Title:
NEGATIVE ELECTRODE AND LITHIUM ION BATTERY COMPRISING NEGATIVE ELECTRODE
Abstract:
An embodiment of the present application provides a negative electrode and a lithium ion battery including the negative electrode, the negative electrode includes a negative electrode current collector, and a negative electrode active material layer arranged on the negative electrode current collector, wherein the negative electrode active material layer includes a negative electrode active material and a dispersant, and the dispersant includes lithium carboxymethylcellulose, wherein the mass ratio of the negative electrode active material to the dispersant being ≥18.74. The present application greatly reduces the DC resistance of the lithium ion battery and the charge transfer resistance at the interface without losing the energy density of the lithium ion battery, without affecting the cycle life of the lithium ion battery or causing cyclic expansion, which avoids the lithium precipitation phenomenon of the lithium ion battery during the cycle of charge and discharge.
Applicant:
NINGDE AMPEREX TECH LIMITED [CN]
Inventors:
LI YAJIE [CN]
SHI CHANGCHUAN [CN]
TAO XINGHUA [CN]
FANG ZHANZHAO [CN]
GAO CHAO [CN]
Other family members:
CN 110197894 A,
Pub. Date: 2019-09-03,
EPO Reference
Titles:
Method for mixing silicon carbon negative electrode
一种硅碳负极的合浆方法
Abstracts:
The invention discloses a method for mixing a silicon carbon negative electrode, comprising the steps of: dissolving a binder in water, stirring uniformly to form a glue A; adding a liquid conductive agent to the glue A, stirring uniformly The glue B is added to the glue B, and the negative electrode active material, the solid conductive agent and the solvent are added, and after stirring, the slurry is adjusted to complete the slurry to obtain a silicon carbon negative electrode slurry. In the invention, the binder and the liquid conductive agent are mixed, uniformly dispersed, and then mixed with other negative electrode materials, thereby avoiding the damage to the mixing cylinder and the climbing rod during the dry mixing process, and also solving the general wet method. The problem of low solids content in the slurry.
Titles:
Preparation process of low expansion lithium ion battery
一种低膨胀锂离子电池的制备工艺
Abstracts:
The invention relates to the field of lithium batteries, and in particular to a preparation process of a low expansion lithium ion battery. The preparation process of the low expansion lithium ion battery of the invention comprises the following steps: (1) preparing a slurry by mixing multi-wall carbon nanotubes, carbon black, graphene, absolute ethanol and lithium carbonate, and coating the slurry by gravure printing On the surface of the porous silicon carbon negative electrode sheet, after drying, a gas diffusion layer is formed on the surface of the porous silicon carbon negative electrode sheet, and a pore-like structure is uniformly distributed on the gas diffusion layer; (2) a porous silicon carbon negative electrode having a gas diffusion layer attached to the surface The chip and the positive electrode piece are assembled into a lithium ion battery; (3) the lithium ion battery is baked, vacuum injected, precharged, and then formed into a process, and the lithium ion battery is filled with nitrogen twice during the formation process, using segmentation. In the formula, when the lithium battery is charged to a different amount of electricity, the gas in the battery is extracted by a negative pressure. The invention can effectively discharge the gas in the lithium ion battery and reduce the expansion ratio of the finished lithium ion battery.
