公开(公告)号：US09449764B2

公开(公告)日：2016-09-20

申请号：US14505619

申请日：2014-10-03

Applicant: GS Yuasa International Ltd.

Inventor： Takeshi Sasaki ,  Yoshihiro Katayama

IPC: H01G11/26 ,  H01M4/96 ,  H01M4/04 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/583 ,  H01M10/0525 ,  H01G11/36 ,  H01G11/56 ,  H01M4/587 ,  H01M4/02

CPC classification number: H01G11/26 ,  H01G11/36 ,  H01G11/56 ,  H01M4/0435 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/583 ,  H01M4/587 ,  H01M4/96 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027 ,  Y02E60/122 ,  Y02T10/7011

Abstract: An electric storage device includes a negative electrode, a positive electrode, and a separator interposed between the negative electrode and the positive electrode, the negative electrode including a negative electrode layer including an active material including an amorphous carbon particle capable of occluding and releasing at least one of an alkali metal and an alkaline earth metal, and a binder. The negative electrode layer includes a plurality of pores, and a ratio S1/S2 of a specific surface area (S1) of micropores having a pore diameter of 1 nm or more and 3 nm or less in the pores to a specific surface area (S2) of mesopores having a pore diameter of 20 nm or more and 100 nm or less therein is 0.3 or more and 0.9 or less.

Abstract translation: 蓄电装置包括负极，正极和置于负极和正极之间的隔膜，负极包括负极层，该负极层包括含有能够至少闭塞和释放的无定形碳颗粒的活性材料 碱金属和碱土金属之一，以及粘合剂。 负极层包括多个孔，并且孔中的孔径为1nm以上且3nm以下的微孔的比表面积（S1）与比表面积（S2）的比S1 / S2 ）的孔径为20nm以上且100nm以下的中孔为0.3以上0.9以下。

公开(公告)号：US09825281B2

公开(公告)日：2017-11-21

申请号：US13629001

申请日：2012-09-27

Applicant: GS YUASA INTERNATIONAL LTD.

Inventor： Daisuke Endo ,  Miki Yasutomi ,  Yoshihiro Katayama ,  Toshiyuki Nukuda

IPC: H01M4/04 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  C01G45/12 ,  C01G51/00 ,  C01G53/00 ,  H02J7/00 ,  H01M10/44

CPC classification number: H01M4/0445 ,  C01G45/1228 ,  C01G51/42 ,  C01G51/50 ,  C01G53/50 ,  C01P2002/50 ,  C01P2002/72 ,  C01P2002/74 ,  C01P2002/77 ,  C01P2004/82 ,  C01P2006/40 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/446 ,  H02J7/00 ,  Y10T29/49108

Abstract: A lithium secondary battery is produced by employing a charging method where a positive electrode upon charging has a maximum achieved potential of 4.3 V (vs. Li/Li+) or lower. The lithium secondary battery contains an active material including a solid solution of a lithium transition metal composite oxide having an α-NaFeO2-type crystal structure. The solid solution has a diffraction peak observed near 20 to 30° in X-ray diffractometry using CuKα radiation for a monoclinic Li[Li1/3Mn2/3]O2-type before charge-discharge. The lithium secondary battery is charged to reach at least a region with substantially flat fluctuation of potential appearing in a positive electrode potential region exceeding 4.3 V (vs. Li/Li+) and 4.8 V (vs. Li/Li+) or lower. A dischargeable electric quantity in a potential region of 4.3 V (vs. Li/Li+) or lower is 177 mAh/g or higher.

公开(公告)号：US10297822B2

公开(公告)日：2019-05-21

申请号：US15362103

申请日：2016-11-28

Applicant: GS YUASA INTERNATIONAL LTD.

Inventor： Daisuke Endo ,  Yoshihiro Katayama ,  Tetsuya Murai ,  Masafumi Shibata

IPC: H01B1/08 ,  H01M4/04 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  C01G45/12 ,  C01G51/00 ,  C01G53/00 ,  H01M10/052 ,  H01M4/02

Abstract: An object of the present invention is to provide a positive active material for a nonaqueous electrolyte secondary battery which has a large discharge capacity and is superior in charge-discharge cycle performance, initial efficiency and high rate discharge performance, and a nonaqueous electrolyte secondary battery using the positive active material. The present invention pertains to a positive active material for a nonaqueous electrolyte secondary battery containing a lithium transition metal composite oxide which has a crystal structure of an α-NaFeO2 type, is represented by a compositional formula Li1+αMe1−αO2 (Me is a transition metal element including Co, Ni and Mn, α>0), and has a molar ratio Li/Me of Li to the transition metal element Me of 1.2 to 1.6, wherein a molar ratio Co/Me of Co in the transition metal element Me is 0.02 to 0.23, a molar ratio Mn/Me of Mn in the transition metal element Me is 0.62 to 0.72, and the lithium transition metal composite oxide is observed as a single phase attributed to a space group R3-m on an X-ray diffraction chart when it is electrochemically oxidized up to a potential of 5.0 V (vs. Li/Li+).

公开(公告)号：US20150024274A1

公开(公告)日：2015-01-22

申请号：US14505619

申请日：2014-10-03

Applicant: GS Yuasa International Ltd.

Inventor： Takeshi Sasaki ,  Yoshihiro Katayama

IPC: H01G11/26 ,  H01G11/36 ,  H01M4/587 ,  H01G11/56

CPC classification number: H01G11/26 ,  H01G11/36 ,  H01G11/56 ,  H01M4/0435 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/583 ,  H01M4/587 ,  H01M4/96 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027 ,  Y02E60/122 ,  Y02T10/7011

Abstract: An electric storage device includes a negative electrode, a positive electrode, and a separator interposed between the negative electrode and the positive electrode, the negative electrode including a negative electrode layer including an active material including an amorphous carbon particle capable of occluding and releasing at least one of an alkali metal and an alkaline earth metal, and a binder. The negative electrode layer includes a plurality of pores, and a ratio S1/S2 of a specific surface area (S1) of micropores having a pore diameter of 1 nm or more and 3 nm or less in the pores to a specific surface area (S2) of mesopores having a pore diameter of 20 nm or more and 100 nm or less therein is 0.3 or more and 0.9 or less.

Abstract translation: 蓄电装置包括负极，正极和置于负极和正极之间的隔膜，负极包括负极层，该负极层包括含有能够至少闭塞和释放的无定形碳颗粒的活性材料 碱金属和碱土金属之一，以及粘合剂。 负极层包括多个孔，并且孔中的孔径为1nm以上且3nm以下的微孔的比表面积（S1）与比表面积（S2）的比S1 / S2 ）的孔径为20nm以上且100nm以下的中孔为0.3以上且0.9以下。

公开(公告)号：US20170117544A1

公开(公告)日：2017-04-27

申请号：US15362103

申请日：2016-11-28

Applicant: GS YUASA INTERNATIONAL LTD.

Inventor： Daisuke Endo ,  Yoshihiro Katayama ,  Tetsuya Murai ,  Masafumi Shibata

IPC: H01M4/505 ,  H01M10/0525 ,  C01G53/00 ,  H01M4/525

CPC classification number: H01M4/505 ,  C01G45/1221 ,  C01G45/1228 ,  C01G51/44 ,  C01G51/50 ,  C01G53/44 ,  C01G53/50 ,  C01P2002/72 ,  C01P2002/74 ,  C01P2002/77 ,  C01P2004/61 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40 ,  H01B1/08 ,  H01M4/0471 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

Abstract: An object of the present invention is to provide a positive active material for a nonaqueous electrolyte secondary battery which has a large discharge capacity and is superior in charge-discharge cycle performance, initial efficiency and high rate discharge performance, and a nonaqueous electrolyte secondary battery using the positive active material. The present invention pertains to a positive active material for a nonaqueous electrolyte secondary battery containing a lithium transition metal composite oxide which has a crystal structure of an α-NaFeO2 type, is represented by a compositional formula Li1+αMe1−αO2 (Me is a transition metal element including Co, Ni and Mn, α>0), and has a molar ratio Li/Me of Li to the transition metal element Me of 1.2 to 1.6, wherein a molar ratio Co/Me of Co in the transition metal element Me is 0.02 to 0.23, a molar ratio Mn/Me of Mn in the transition metal element Me is 0.62 to 0.72, and the lithium transition metal composite oxide is observed as a single phase attributed to a space group R3-m on an X-ray diffraction chart when it is electrochemically oxidized up to a potential of 5.0 V (vs. Li/Li+).