公开(公告)号：JP2002203540A

公开(公告)日：2002-07-19

申请号：JP2000403464

申请日：2000-12-28

Applicant: SONY CORP

Inventor： SUZUKI KIYOHIKO ,  TANAKA TAKEHIKO ,  YAMAMOTO YOSHIKATSU

IPC: H01M10/05 ,  C01B31/02 ,  H01M4/131 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/052 ,  H01M4/02 ,  H01M4/58 ,  H01M10/40

Abstract: PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery superior in high temperature storage characteristics and load characteristics. SOLUTION: In the nonaqueous electrolyte secondary battery equipped with a positive electrode having a positive electrode mixture layer composed of manganese containing oxide and nickel containing oxide as the main body, with a negative electrode comprised by containing at least one kind among lithium metal, lithium alloy or a material capable of doping/de-doping lithium, and with the nonaqueous electrolyte, Li2CO3 is contained in the positive electrode mixture layer, and the content of the Li2CO3 is in the range larger than 0 wt.% and not more than 5 wt.% in the positive electrode mixture layer.

公开(公告)号：JP2001266876A

公开(公告)日：2001-09-28

申请号：JP2000077846

申请日：2000-03-15

Applicant: SONY CORP ,  NIPPON KAGAKU SANGYO KK

Inventor： YAMAHIRA TAKAYUKI ,  SATO ATSUSHI ,  YAMAMOTO YOSHIKATSU ,  KAJIMA HAJIME ,  SEKINE MASAKI

IPC: H01M10/05 ,  H01M4/525 ,  H01M4/58 ,  H01M4/02 ,  H01M10/40

Abstract: PROBLEM TO BE SOLVED: To provide a positive electrode active material and a non-aqueous electrolyte battery that realize high capacity and are excellent in preservation characteristics under high temperature environment. SOLUTION: The positive electrode active material contains a compound as expressed in the general formula LixNiyCzAl(1-y-z)O2 (wherein 0.05

公开(公告)号：JPH10188992A

公开(公告)日：1998-07-21

申请号：JP34423796

申请日：1996-12-24

Applicant: SONY CORP

Inventor： ONO TAKASHI ,  KATO NAOYUKI ,  YAMAMOTO YOSHIKATSU ,  MORI TAKAYOSHI

IPC: C08L79/08 ,  C01B31/02 ,  C09J127/16 ,  C09J179/08 ,  H01M4/02 ,  H01M4/131 ,  H01M4/136 ,  H01M4/48 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/587 ,  H01M4/62 ,  H01M10/05 ,  H01M10/0525 ,  H01M10/0566 ,  H01M10/40

Abstract: PROBLEM TO BE SOLVED: To provide a non-aqueous electrolyte battery, in which reduction in discharge capacity with a sudden temperature change is remarkably reduced and which has excellent productivity, by unifying any one of a positive electrode active material and a negative electrode active material with a binder agent formed of the mixture of polyimide, of which imidation is completed and which can be dissolved in an organic solvent, and a fluorinated polymer. SOLUTION: A positive electrode having a positive electrode active material formed of a chalcogen compound, in which lithium ion can be freely inserted and drawn, and a composite chalcogen compound, which includes lithium, and a negative electrode having a negative electrode active material formed of a material, in which lithium ion can be freely inserted and drawn, such as carbon are provided so as to obtain a non-aqueous electrolyte battery. In this battery, an active material of any one of the positive electrode and the negative electrode is unified by the binder agent. As this binder agent, a mixture of polyimide, of which imidation is completed and which can be dissolved in an organic solvent and which is expressed with the formula, and a fluorinated polymer such as polyvinylidene fluoride is used. In the formula, Ar1 , Ar2 are aryls and (n) is an integer of 1 or more.

公开(公告)号：JPH07130367A

公开(公告)日：1995-05-19

申请号：JP27284793

申请日：1993-10-29

Applicant: SONY CORP

Inventor： YAMAMOTO YOSHIKATSU

IPC: H01M10/05 ,  C01B31/02 ,  C01B31/04 ,  H01M4/525 ,  H01M4/58 ,  H01M4/02 ,  H01M4/04

Abstract: PURPOSE:To provide a lithium transition metal composite oxide whose composition and characteristics are uniform and function as a positive active material is excellent. CONSTITUTION:A mixture of a lithium salt and a transition metal salt is baked in an oxygen atmosphere to synthesize a lithium transition metal composite oxide having the composition of LixNiyM1-yO2 (wherein M shows at least one transition metal, and 0.05

公开(公告)号：JPH04328277A

公开(公告)日：1992-11-17

申请号：JP12530291

申请日：1991-04-26

Applicant: SONY CORP

Inventor： KATO NAOYUKI ,  YAMAMOTO YOSHIKATSU

IPC: H01M10/05 ,  C01B31/02 ,  C01B31/04 ,  C01B31/08 ,  H01M4/131 ,  H01M4/525 ,  H01M4/587

Abstract: PURPOSE:To improve the charge/discharge cycle characteristic of a nonaqueous electrolyte secondary battery using lithium compound oxide as the positive electrode active material. CONSTITUTION:In a nonaqueous electrolyte secondary battery using LixMO2 (M represents at least one kind of transition metals, and desirably at least one kind of Co and Ni, and 0.05 ) included in LixMO2 as the positive electrode active material is set 0.41weight% or less.

公开(公告)号：JPH04249073A

公开(公告)日：1992-09-04

申请号：JP3550491

申请日：1991-02-05

Applicant: SONY CORP

Inventor： YAMAMOTO YOSHIKATSU

IPC: C01B31/02 ,  H01M4/525 ,  H01M6/10 ,  H01M10/05 ,  H01M10/052 ,  H01M10/0566

Abstract: PURPOSE:To suppress drop of the capacity associate with progress of the charging/discharging cycles and construct a lightweight battery with lesser self-discharging and excellent characteristics by structuring powder-form Li composite oxides to be used as a pos. electrode active substance so that its specific surface are has a certain specified m /g value. CONSTITUTION:Powder-form Li composite oxides to be used as pos. electrode 2 active substance shall have a specific surface area of 0.01-3.0m /g, wherein the formation of the Li composite oxides shall start with three sorts of carbonates of Li, Co, and Ni. Among them two sorts or more of carbonates incl. Li carbonate are mixed, and the mixture of carbonates is baked in oxygen atmosphere. Metal Li, Li alloy, etc., are used as the active substance of a neg. electrode 1, while Li salt solution in non-aqueous (organic) solvent is used as the non-aqueous electrolyte. Thereby drop of the capacity associate with the charging/discharging cycles is suppressed, and a lightweight battery with lesser self-discharge and excellent characteristics is achieved.