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1. WO2020067480 - COMPOSITE PARTICLE GROUP, NEGATIVE ELECTRODE ACTIVE MATERIAL PARTICLE GROUP, NEGATIVE ELECTRODE, BATTERY, AND COMPOSITE PARTICLES WITH EXPOSED CONVEX PARTS CONTAINED IN COMPOSITE PARTICLE GROUP

Publication Number WO/2020/067480
Publication Date 02.04.2020
International Application No. PCT/JP2019/038275
International Filing Date 27.09.2019
IPC
H01M 4/36 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
36Selection of substances as active materials, active masses, active liquids
H01M 4/38 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
36Selection of substances as active materials, active masses, active liquids
38of elements or alloys
CPC
H01M 4/36
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
36Selection of substances as active materials, active masses, active liquids
H01M 4/38
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
36Selection of substances as active materials, active masses, active liquids
38of elements or alloys
Applicants
  • 日本製鉄株式会社 NIPPON STEEL CORPORATION [JP]/[JP]
Inventors
  • 松本 克公 MATSUMOTO, Katsumasa
  • 永田 辰夫 NAGATA, Tatsuo
  • 山本 祐義 YAMAMOTO, Sukeyoshi
Agents
  • アセンド特許業務法人 ASCEND IP LAW FIRM
Priority Data
2018-18478628.09.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) COMPOSITE PARTICLE GROUP, NEGATIVE ELECTRODE ACTIVE MATERIAL PARTICLE GROUP, NEGATIVE ELECTRODE, BATTERY, AND COMPOSITE PARTICLES WITH EXPOSED CONVEX PARTS CONTAINED IN COMPOSITE PARTICLE GROUP
(FR) GROUPE DE PARTICULES COMPOSITES, GROUPE DE PARTICULES DE MATÉRIAU ACTIF D'ÉLECTRODE NÉGATIVE, ÉLECTRODE NÉGATIVE, BATTERIE ET PARTICULES COMPOSITES AYANT DES PARTIES CONVEXES EXPOSÉES CONTENUES DANS UN GROUPE DE PARTICULES COMPOSITES
(JA) 複合粒子群、負極活物質粒子群、負極、電池、及び、複合粒子群に含有される凸部露出複合粒子
Abstract
(EN)
Provided is a composite particle group capable of achieving both excellent quick-charging performance and initial charging/discharging performance. Among the constituent multiple composite particles of the composite particle group, in multiple composite particles having multiple convex parts and a diameter equal to or greater than the median diameter (d50), amorphous carbon coatings on the surfaces of active material particles have an average areal coverage ratio of 50-90%. When regions where the surfaces of the active material particles are exposed by 1 µm2 or more in the composite particles are defined as exposed regions, the number density of the exposed regions with respect to the total surface area of the multiple composite particles is 0.0010 to 0.0500 region/µm2.
(FR)
L'invention concerne un groupe de particules composites capable d'atteindre à la fois une excellente performance de charge rapide et une excellente performance de charge/décharge initiale. Parmi les multiples particules composites constitutives du groupe de particules composites, dans de multiples particules composites ayant de multiples parties convexes et un diamètre supérieur ou égal au diamètre médian (d50), des revêtements de carbone amorphe sur les surfaces de particules de matériau actif ont un rapport de couverture surfacique moyen de 50 à 90 %. Lorsque les régions où les surfaces des particules de matériau actif sont exposées de 1 µm2 ou plus dans les particules composites sont définies comme des régions exposées ,la densité de nombre des régions exposées par rapport à la surface totale des multiples particules composites est de 0,0010 à 0,0500 région/µm2.
(JA)
優れた急速充電性能と初回充放電効率とを両立できる複合粒子群を提供する。複合粒子群を構成する複数の複合粒子は、複数の凸部を有し、メジアン径(d50)以上の粒径を有する複数の複合粒子において、活物質粒子の表面における非晶質炭素被膜の平均被覆率が50~90面積%であり、複合粒子において、活物質粒子の表面が1μm以上露出している領域を露出領域と定義するとき、複数の複合粒子の総表面積に対する露出領域の個数密度は0.0010~0.0500個/μmである。
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