Ohara, Inc.

Kabushiki Kaisha Ohara

Yasushi Inda

Kazuo Ohara

Morinobu Endo

Tetsuo Uchiyama

A solid electrolyte suitable for use in all solid type lithium ion secondary battery is made by sintering a form, particularly a greensheet, comprising at least lithium ion conductive inorganic substance powder. The solid electrolyte has porosity of 20 vol % or over.

Lithium ion conductive solid electrolyte and method for manufacturing the same

A lithium ion conductive glass ceramics which solves a problem of low thermal stability of the related-art lithium ion conductive glass ceramics and which is high in lithium ion conductivity, high in thermal stability of a raw glass and easy for molding is provided. The amount of a specified component in a glass ceramics (raw glass) is limited to a specified range, and specifically, a ZrOcomponent is incorporated in the range of from 0.5% to 2.5% in terms of % by mass on the oxide basis.

Battery including lithium ion conductive solid electrolyte and method for producing the same

A method of manufacturing a lithium ion secondary battery comprising the steps of: forming a laminate by laminating an electrolyte green sheet and a positive electrode green sheet; and sintering the laminate is provided. At least one of the electrolyte green sheet and the positive electrode green sheet contains an amorphous oxide glass powder in which a crystalline having a lithium ion conducting property is precipitated in the step of sintering. A solid state battery produced in accordance with the method is provided.

Method of manufacturing a solid lithium ion secondary battery with an electrolyte layer and/or positive electrode layer containing a crystallite having a lithium ion conducting property

There is provided a lithium ion conductive glass-ceramics which is dense, contains few microvoids causing the decrease in lithium ion conductivity, and achieves good lithium ion conductivity. A glass-ceramics which comprises at least crystallines having an LiTiPOstructure, the crystallines satisfying 1&#x3c;I/I&#x2266;2, wherein Iis the peak intensity assigned to the plane index(2&#x3b8;=20 to 21&#xb0;), and Iis the peak intensity assigned to the plane index(2&#x3b8;=24 to 25&#xb0;) as determined by X-ray diffractometry.

Glass and glass-ceramics

A lithium ion secondary battery includes a positive electrode, a negative electrode and a thin film solid electrolyte including lithium ion conductive inorganic substance. The thin film solid electrolyte has thickness of 20 &#x3bc;m or below and is formed directly on an electrode material or materials for the positive electrode and/or the negative electrode. The thin film solid electrolyte has lithium ion conductivity of 10Scmor over and contains lithium ion conductive inorganic substance powder in an amount of 40 weight % or over in a polymer medium. The average particle diameter of the inorganic substance powder is 0.5 &#x3bc;m or below. According to a method for manufacturing the lithium ion secondary battery, the thin film solid electrolyte is formed by coating the lithium ion conductive inorganic substance directly on the electrode material or materials for the positive electrode and/or the negative electrode.

Lithium ion secondary battery and a method for manufacturing the same

A method for manufacturing a lithium ion secondary battery comprises the step of sintering a laminate sandwiched by setters disposed on both sides of the laminate having only interfaces between an electrolyte green sheet and a positive electrode green sheet and/or a negative electrode green sheet. A lithium ion secondary battery manufactured by the method described above is also provided.

Method for manufacturing lithium ion secondary battery

An all solid type lithium ion secondary battery which has high heat resistance and can be used over a broad temperature range, has a high battery capacity and an excellent charging-discharging characteristic, and can be used stably for a long period of time includes an inorganic substance including a lithium ion conductive crystalline and is substantially free of an organic substance and an electrolytic solution. The inorganic substance comprising a lithium ion conductive crystalline preferably is lithium ion conductive glass-ceramics.

All solid lithium ion secondary battery and a solid electrolyte therefor

A lithium ion secondary cell comprises a positive electrode, a negative electrode, a solid electrolyte and a fiber layer provided in an interface between the solid electrolyte and the positive electrode and/or in an interface between the solid electrolyte and the negative electrode.

Lithium ion secondary cell

There is provided a glass-ceramic composite electrolyte including a medium containing glass-ceramic powder impregnated with a non-aqueous electrolytic solution. There is also provided a lithium secondary cell having a positive electrode, a negative electrode and a separator in which the separator includes the above described composite electrolyte. The glass-ceramic powder consists of grains having an average grain diameter of 20 &mgr;m or below (calculated on the basis of volume), a maximum grain diameter of 44 &mgr;m or below and lithium ion conductivity of 1&times;10 S&middot;cm or over. The glass-ceramic composite electrolyte has thickness of 100 &mgr;m or below and lithium ion conductivity of 1&times;10 S&middot;cm or over.

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Sagamihara, Japan

Yasushi Inda