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1. 发明专利

JPH10149829A MANUFACTURE OF LITHIUM MANGANESE COMPOSITE OXIDE FOR POSITIVE ACTIVE MATERIAL AND LITHIUM SECONDARY BATTERY 失效
公开(公告)号：JPH10149829A
公开(公告)日：1998-06-02
申请号：JP30627996
申请日：1996-11-18
申请人： TOSHIBA BATTERY
发明人： MITSUISHI IWAO , MIYAMOTO SHINICHI , YAJIMA SUMITOMO , ANZAI KAZUO
IPC分类号： C01G45/12 , C01B31/04 , H01M4/505 , H01M10/05 , H01M10/052 , H01M10/0566 , H01M4/58 , H01M4/02 , H01M4/04 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a positive active material for a battery with high capacity and long cycle life by treating lithium manganese oxide having spinel structure whose lattice constant (a) is within the specified range. SOLUTION: A lithium salt such as LiMn2 O4 having spinel structure whose lattice constant (a) is 0.824nm or more is dissolved in a solvent such as acetonitrile for example, and reflux-treated. Li2 Mn2 O4 having tetragonal structure for example represented by Li1+x Mn2 O4 (0

2. 发明专利

JPH09161800A MANUFACTURE OF LITHIUM SECONDARY BATTERY 失效
公开(公告)号：JPH09161800A
公开(公告)日：1997-06-20
申请号：JP31798895
申请日：1995-12-06
申请人： TOSHIBA BATTERY
发明人： ANZAI KAZUO , YAJIMA SUMITOMO , MITSUISHI IWAO , MIYAMOTO SHINICHI
IPC分类号： H01M10/05 , C01B31/02 , H01M4/505 , H01M10/0525 , H01M10/0566 , H01M4/58 , H01M4/02 , H01M4/04 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To easily synthesize a lithium manganese spinel in a short time when Li becomes excessive since the blending ratio of lithium salt and manganese salt does not fall in a theoretical value. SOLUTION: This manufacturing method is provided with a positive electrode containing a lithium manganese composite oxide having a spinel type crystal structure, a negative electrode and nonaqueous electrolyte, and charging discharging is performed by injection-separation of a lithium ion between the positive electrode and the negative electrode. In this case, the lithium manganese composite oxide of the positive electrode is synthesized by baking it after lithium salt and manganese salt are held at a temperature in a range of 490 to 550 deg.C.

3. 发明专利

JP2000113907A LITHIUM ION SECONDARY BATTERY 失效
公开(公告)号：JP2000113907A
公开(公告)日：2000-04-21
申请号：JP28511398
申请日：1998-10-07
申请人： TOSHIBA BATTERY
发明人： YAJIMA SUMITOMO
IPC分类号： H01M10/05 , H01M4/505 , H01M10/052 , H01M10/0568 , H01M10/40 , H01M4/02 , H01M4/58
摘要： PROBLEM TO BE SOLVED: To improve holding characteristic and discharging/charging characteristic at a high temperature by providing a positive electrode with, as active material, lithium manganese oxide forming by directly reacting spinel lithium manganese oxide with fluorine gas. SOLUTION: A positive electrode contains active material composed of surface reforming lithium manganese oxide powder forming by directly reacting spinel lithium manganese oxide with fluorine gas. This reaction flows spinel lithium manganese oxide particles and supplies fluorine gas diluted with carrier gas such as nitrogen, Ar, He to slowly react them with each other. When nonaqueous electrolyte particularly containing fluoride lithium salt as electrolyte is used, hydrogen fluoride generated by humidity reaction noticeably solves out manganese in lithium manganese oxide. Therefore, the positive electrode active material is effective for use of nonaqueous electrolyte containing fluoride lithium salt.

4. 发明专利

JP2000040511A LITHIUM ION SECONDARY BATTERY 失效
公开(公告)号：JP2000040511A
公开(公告)日：2000-02-08
申请号：JP20894398
申请日：1998-07-24
申请人： TOSHIBA BATTERY
发明人： YAJIMA SUMITOMO
IPC分类号： H01M10/05 , B82Y99/00 , H01M4/505 , H01M4/58 , H01M4/02 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To increase the electrolyte retaining capacity of a positive electrode, and to suppress capacity drop in high temperature storage without dropping charge/discharge capacity at a room temperature by using the positive electrode containing an active material comprising a primary particle aggregate of LiMn2 O4 having pores between primary particles of a specified average size. SOLUTION: A positive electrode constituting a battery together with a negative electrode made of a carbonaceous material, a nonaqueous solvent electrolyte containing a lithium salt, and a separator is prepared by press molding a mixture of an active material of a primary particle aggregate of LiMn2O4 having a pore average size of 10 nm or less, a conductive auxiliary, and a binder. In charge/discharge, lithium ions are moved by solid diffusion within a crystal lattice of primary particles and liquid diffusion in an electrolyte retained between spaces of the aggregate. Permeation of the electrolyte into the active material caused by a capillary action is suppressed with increased in pore size, but not decreased in a pore size of 10 nm of less. The LiMn2O4 has a cubic system spinel single phase, and is obtained by mixing, baking and sieving powder of lithium hydroxide, lithium carbonate, and electrolytic manganese dioxide each having a given particle size.

5. 发明专利

JP2001160418A LITHIUM ION RECHARGEABLE BATTERY 失效
公开(公告)号：JP2001160418A
公开(公告)日：2001-06-12
申请号：JP34220499
申请日：1999-12-01
申请人： TOSHIBA BATTERY
发明人： YAJIMA SUMITOMO
IPC分类号： H01M10/05 , H01M4/131 , H01M4/62 , H01M10/052 , H01M10/0566 , H01M10/40 , H01M4/02
摘要： PROBLEM TO BE SOLVED: To provide a lithium ion rechargeable battery having a positive elec trode containing lithium manganese oxide which suppresses capacity degradation in high temperature storage. SOLUTION: This lithium ion rechargeable battery comprises a positive electrode 2 containing lithium manganese oxide and phosphorus pentoxide as an active material, a negative electrode 4 containing material which is possible to store and release lithium ions, and a nonaqueous electrolyte.

6. 发明专利

JPH10302766A LITHIUM ION SECONDARY BATTERY 失效
公开(公告)号：JPH10302766A
公开(公告)日：1998-11-13
申请号：JP10477297
申请日：1997-04-22
申请人： TOSHIBA BATTERY
发明人： YAJIMA SUMITOMO
IPC分类号： C01G49/00 , C01G51/00 , C01G53/00 , H01M4/505 , H01M4/525 , H01M10/05 , H01M10/052 , H01M10/0566 , H01M10/44 , H01M4/02 , H01M4/04 , H01M4/58 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To increase initial charging and discharging capacity and improve the cycle characteristic of service capacity by forming a lithium secondary battery so that a negative electrode contains a material capable of storing and releasing lithium ions as an active material, a positive electrode contains lithium-manganese composite oxide as an active material and a water electrolyte is contained. SOLUTION: A lithium secondary battery is formed so that a negative electrode contains a material capable of storing and releasing lithium ions as an active material, a positive electrode contains the lithium-manganese composite oxide expressed by the formula of Li2 Mn2-x Mx O4 as an active material, and further an water electrolyte is contained. In the formula, M stands for metal selected from Fe, Co and Ni, and (x) for a value in the range of 0.05

7. 发明专利

JPH10149828A LITHIUM SECONDARY BATTERY 失效
公开(公告)号：JPH10149828A
公开(公告)日：1998-06-02
申请号：JP30627896
申请日：1996-11-18
申请人： TOSHIBA BATTERY
发明人： ANZAI KAZUO , MITSUISHI IWAO , MIYAMOTO SHINICHI , YAJIMA SUMITOMO
IPC分类号： H01M10/05 , C01B31/02 , H01M4/02 , H01M4/36 , H01M4/505 , H01M10/0525 , H01M10/058 , H01M4/58 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery having a positive electrode containing a positive electrode active material resolving the lithium ion trap problem of a negative electrode containing a carbon material at the time of an initial charge and having little deterioration due to repeated charges/ discharges, i.e., little cycle deterioration. SOLUTION: In this lithium ion secondary battery, lithium ions are stored or released between a positive electrode 2 containing a positive electrode active material and a negative electrode 4 containing a carbon material at the time of a charge/discharge. The positive electrode active material is constituted of a lithium manganese spinel compound expressed by the formula Li1+x Mn2-x O4 (where 0

8. 发明专利

JP2001076722A LITHIUM ION SECONDARY BATTERY 失效
公开(公告)号：JP2001076722A
公开(公告)日：2001-03-23
申请号：JP24788399
申请日：1999-09-01
申请人： TOSHIBA BATTERY
发明人： KOBAYASHI AYAKO , YAJIMA SUMITOMO
IPC分类号： H01M10/05 , C01B31/02 , H01M4/505 , H01M10/0525 , H01M10/0566 , H01M4/58 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery with high cycle characteristics. SOLUTION: The lithium ion secondary battery has a negative electrode 4 containing a material capable of storing.releasing lithium ions as an active material; a positive electrode 2 containing spinel lithium manganese oxide powder represented by LiMn2O4 as an active material; and a nonaqueous electrolyte, and the lithium manganese oxide powder has an eluting amount of less than 0.2 wt.% when measured by ICP emission spectroscopy after immersed in an electrolyte at 60 deg.C for 5 days and changing amount of half-band width of a diffraction line in (400) planes in X-ray diffraction pattern of less than 0.05 deg. before and after of manganese elution.

9. 发明专利

JPH10154510A LITHIUM SECONDARY BATTERY 失效
公开(公告)号：JPH10154510A
公开(公告)日：1998-06-09
申请号：JP31049596
申请日：1996-11-21
申请人： TOSHIBA BATTERY
发明人： ANZAI KAZUO , MITSUISHI IWAO , MIYAMOTO SHINICHI , YAJIMA SUMITOMO
IPC分类号： H01M10/05 , C01B31/02 , H01M4/505 , H01M4/525 , H01M4/587 , H01M4/58 , H01M4/02 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery which is equipped with a positive electrode containing positive electrode active material which has less deterioration resulting from repeated charging and discharging, that is, less cycle deterioration than that of conventional lithium manganese compound oxide. SOLUTION: In this lithium secondary battery, the storage and discharge of lithium ions between a positive electrode 2 containing positive electrode active material and a negative electrode 4 containing negative electrode active material is conducted. In this case, the positive electrode active material is composed of a lithium manganese iron spinel compound which is expressed by a general formula Li1+x Mn2-x-y Fey O4 , and (x) and (y) are in an area inside a polygon specified by specific points on a two-dimensional plane expressed by rectangular coordinates of (x) and (y).

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