公开(公告)号：US20190237763A1

公开(公告)日：2019-08-01

申请号：US16312398

申请日：2017-06-19

Applicant: SHOWA DENKO K.K.

Inventor： Yasuaki WAKIZAKA ,  Yoshikuni SATO ,  Daisuke MIYAMOTO ,  Shunsuke YOSHIOKA ,  Daisuke KONO ,  Ayaka IKADO

IPC: H01M4/587 ,  H01M10/0525 ,  C01B32/20

CPC classification number: H01M4/587 ,  C01B32/20 ,  C01B32/205 ,  C01P2002/60 ,  C01P2004/32 ,  C01P2004/51 ,  C01P2004/60 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40 ,  H01M4/133 ,  H01M4/364 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: A graphite material, including high crystallinity graphite and spherical graphite, in which high crystallinity graphite: (1) a rhombohedral crystal ratio by X-ray diffractometry is 0.02 or less, (2) Lc is 90 nm or more, (3) when a pressure of 1 GPa for 10 seconds is applied to the high crystallinity graphite, the increment rate of the BET specific surface area after applying the pressure to the BET specific surface area before applying the pressure is 90% or less, and (4) D10 is 5.0 μm or more; and in which spherical graphite: (1) a median of the circularity is 0.90 or more, and (2) a tapping density is 1.20 g/cm3 or more; and the ratio by mass of the high crystallinity graphite and the spherical graphite is 95:5 to 40:60; an electrode using the graphite material as an electrode active material; and a lithium ion secondary battery using the electrode.

公开(公告)号：US20150364751A1

公开(公告)日：2015-12-17

申请号：US14765510

申请日：2014-02-03

Applicant: SHOWA DENKO K.K.

Inventor： Yasuaki WAKIZAKA ,  Yuichi KAMIJO ,  Daisuke KONO ,  Yoshikuni SATO

IPC: H01M4/133 ,  C01B31/04 ,  H01M4/587

CPC classification number: H01M4/133 ,  C01B32/20 ,  C01P2006/40 ,  H01M4/043 ,  H01M4/1393 ,  H01M4/587 ,  H01M10/0525

Abstract: A graphite powder, preferably including scale-like particles, which satisfies the following formulae (1) and (2), wherein e(0.5) represents the initial charge-discharge efficiency of a coin cell fabricated from an electrode (work electrode) produced by compressing an electrode material employing graphite powder as an active material under a pressure of 0.5 t/cm2, a lithium metal counter electrode, a separator and an electrolytic solution; and e(3) represents the initial charge-discharge efficiency of a coin cell fabricated from an electrode (work electrode) produced by compressing an electrode material employing graphite powder as an active material under a pressure of 3 t/cm2, a lithium metal counter electrode, a separator and an electrolytic solution: e(3)(%)−e(0.5)(%)≧1,  formula (1): e(3)(%)>85.  formula (2): Also disclosed is a method of producing the graphite powder; a graphite material for a battery electrode; an electrode for a lithium ion; and a lithium-ion secondary battery.

Abstract translation: 一种满足下式（1）和（2）的石墨粉末，优选包括鳞片状颗粒，其中e（0.5）表示由电极（工作电极）制成的纽扣电池的初始充电 - 放电效率 在0.5t / cm 2的压力下，使用石墨粉末作为活性物质来压制电极材料，锂金属对电极，隔膜和电解液; e（3）表示由在3t / cm 2的压力下使用石墨粉作为活性物质的电极材料制成的电极（工作电极）制造的纽扣电池的初始充放电效率， 电极，隔板和电解液：e（3）（％）-e（0.5）（％）≥1，式（1）：e（3）（％）> 85。 式（2）：还公开了石墨粉的制造方法， 用于电池电极的石墨材料; 锂离子电极; 和锂离子二次电池。

公开(公告)号：US20180261828A1

公开(公告)日：2018-09-13

申请号：US15973810

申请日：2018-05-08

Applicant: SHOWA DENKO K.K.

Inventor： Yasuaki WAKIZAKA ,  Yuichi KAMIJO ,  Daisuke KONO ,  Yoshikuni SATO

IPC: H01M4/133 ,  H01M4/1393 ,  H01M4/04 ,  H01M4/587 ,  C01B32/20 ,  H01M10/0525

CPC classification number: H01M4/133 ,  C01B32/20 ,  C01P2006/40 ,  H01M4/043 ,  H01M4/1393 ,  H01M4/587 ,  H01M10/0525

Abstract: A graphite powder, preferably including scale-like particles, which satisfies the following formulae (1) and (2), wherein e(0.5) represents the initial charge-discharge efficiency of a coin cell fabricated from an electrode (work electrode) produced by compressing an electrode material employing graphite powder as an active material under a pressure of 0.5 t/cm2, a lithium metal counter electrode, a separator and an electrolytic solution; and e(3) represents the initial charge-discharge efficiency of a coin cell fabricated from an electrode (work electrode) produced by compressing an electrode material employing graphite powder as an active material under a pressure of 3 t/cm2, a lithium metal counter electrode, a separator and an electrolytic solution: e(3)(%)−e(0.5)(%)≥1,  formula (1): e(3)(%)>85.  formula (2): Also disclosed is a method of producing the graphite powder; a graphite material for a battery electrode; an electrode for a lithium ion; and a lithium-ion secondary battery.

公开(公告)号：US20180069260A1

公开(公告)日：2018-03-08

申请号：US15573176

申请日：2016-05-10

Applicant: SHOWA DENKO K.K.

Inventor： Yasuaki WAKIZAKA ,  Yoshikuni SATO ,  Daisuke MIYAMOTO

IPC: H01M10/0525 ,  C01B32/20 ,  H01M4/587

CPC classification number: H01M10/0525 ,  C01B32/20 ,  H01M4/587

Abstract: A method for producing a graphite powder for a negative electrode of a lithium ion secondary battery, including a process of graphitizing a mixture of a carbon raw material powder and a silicon carbide powder, wherein a 90% particle diameter in a volume-based cumulative particle size distribution by laser diffraction method, D90, is 1 to 40 μm, a silicon carbide content in a total mass of a carbon raw material and silicon carbide (mass of silicon carbide/total mass of the carbon raw material and silicon carbide) is 1 to 35 mass %, the ratio of a 50% particle diameter in a volume-based cumulative particle size distribution by laser diffraction method, D50, of the carbon raw material powder to D50 of silicon carbide powder (D50 of the carbon raw material powder/D50 of silicon carbide powder) is 0.40 to 4.0.

公开(公告)号：US20180269469A1

公开(公告)日：2018-09-20

申请号：US15983462

申请日：2018-05-18

Applicant: SHOWA DENKO K.K.

Inventor： Yasuaki WAKIZAKA ,  Yuichi KAMIJO ,  Daisuke KONO ,  Yoshikuni SATO

IPC: H01M4/133 ,  H01M4/1393 ,  H01M4/04 ,  H01M4/587 ,  C01B32/20 ,  H01M10/0525

CPC classification number: H01M4/133 ,  C01B32/20 ,  C01P2006/40 ,  H01M4/043 ,  H01M4/1393 ,  H01M4/587 ,  H01M10/0525

Abstract: A graphite powder, preferably including scale-like particles, which satisfies the following formulae (1) and (2), wherein e(0.5) represents the initial charge-discharge efficiency of a coin cell fabricated from an electrode (work electrode) produced by compressing an electrode material employing graphite powder as an active material under a pressure of 0.5 t/cm2, a lithium metal counter electrode, a separator and an electrolytic solution; and e(3) represents the initial charge-discharge efficiency of a coin cell fabricated from an electrode (work electrode) produced by compressing an electrode material employing graphite powder as an active material under a pressure of 3 t/cm2, a lithium metal counter electrode, a separator and an electrolytic solution: e(3)(%)−e(0.5)(%)≥1,  formula (1): e(3)(%)>85.  formula (2): Also disclosed is a method of producing the graphite powder; a graphite material for a battery electrode; an electrode for a lithium ion; and a lithium-ion secondary battery.

公开(公告)号：US20170155149A1

公开(公告)日：2017-06-01

申请号：US15314828

申请日：2015-05-25

Applicant: SHOWA DENKO K.K.

Inventor： Naoto KAWAGUCHI ,  Yasuaki WAKIZAKA ,  Yuichi KAMIJO ,  Yoshiki SHIMODAIRA ,  Yoshikuni SATO

IPC: H01M4/587 ,  H01M4/1393 ,  H01M4/133 ,  H01M4/04 ,  H01M10/0525

CPC classification number: H01M4/587 ,  C01B32/00 ,  C01B32/05 ,  C01B32/20 ,  C01P2002/74 ,  C01P2004/02 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/40 ,  H01M4/0409 ,  H01M4/043 ,  H01M4/133 ,  H01M4/1393 ,  H01M10/0525 ,  Y02T10/7011

Abstract: A carbon material, being a not-scaly carbon material having specific optical structures, wherein the ratio between the peak intensity I110 of plane (110) and the peak intensity I004 of plane (004) of a graphite crystal determined by the powder XRD measurement, I110/I004, is 0.1 to 0.6; an average circularity is 0.80 to 0.95; d002 is 0.337 nm or less; and the total pore volume of pores having a diameter of 0.4 μm or less measured by the nitrogen gas adsorption method is 8.0 μl/g to 20.0 μl/g; and a production method of the same.

公开(公告)号：US20180019472A1

公开(公告)日：2018-01-18

申请号：US15545850

申请日：2016-01-26

Applicant: SHOWA DENKO K.K.

Inventor： Ayaka IKADO ,  Yasuaki WAKIZAKA ,  Takashi TERASHIMA ,  Yoshikuni SATO

IPC: H01M4/587 ,  H01M4/583

CPC classification number: H01M4/587 ,  C01B32/20 ,  C01B32/205 ,  C01B32/21 ,  C01B2204/04 ,  H01M4/5835 ,  H01M10/0525

Abstract: A method for manufacturing a graphite powder for a negative electrode material for a lithium-ion secondary battery, which includes a process of pulverizing a graphite precursor, and subjecting a mixture of the pulverized graphite precursor and an alkaline compound to graphitization treatment by heating the mixture at 2,800 to 3,500° C. Also disclosed is a graphite powder obtained by the manufacturing method, a negative electrode for a lithium-ion secondary battery containing the graphite powder and a lithium-ion battery provided with the negative electrode.

公开(公告)号：US20180009665A1

公开(公告)日：2018-01-11

申请号：US15546786

申请日：2016-02-08

Applicant: SHOWA DENKO K.K.

Inventor： Naoto KAWAGUCHI ,  Takashi TERASHIMA ,  Yoshikuni SATO ,  Yasuaki WAKIZAKA

IPC: H01M4/587 ,  H01M4/133 ,  H01M4/1393

CPC classification number: C01B32/05 ,  C01B32/20 ,  C01P2002/72 ,  C01P2002/78 ,  C01P2002/82 ,  C01P2004/51 ,  C01P2006/14 ,  C01P2006/16 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/587

Abstract: A non-flaky carbon material having specific optical structures, wherein the ratio between the peak intensity I110 of (110) plane and the peak intensity I004 of (004) plane of a graphite crystal determined by the powder XRD measurement, I110/I004, is 0.10 or more and 0.35 or less; an average circularity is 0.80 or more and 0.95 or less; d002 is 0.337 nm or less; and the total pore volume of pores having a diameter of 0.4 μm or less measured by the nitrogen gas adsorption method is 25.0 μl/g or more and 40.0 μl/g or less. Also disclosed is a method for producing the carbon material, a carbon material for a battery electrode, a paste for an electrode incorporating the carbon material for a battery electrode, an electrode for a lithium battery incorporating a formed body of the paste for an electrode, a lithium-ion secondary battery including the electrode and a method for producing the electrode.