HITACHI MAXELL ENERGY, LTD.
|HITACHI MAXELL ENERGY, LTD. Patent applications|
|Patent application number||Title||Published|
|20130136988||NEGATIVE ELECTRODE FOR NON-AQUEOUS SECONDARY BATTERY, AND A NON-AQUEOUS SECONDARY BATTERY - [Objectives] The present invention provides a non-aqueous secondary battery in which a material containing Si and O as constituent elements is used in a negative electrode. The present invention provides a non-aqueous secondary battery having good charge discharge cycle characteristics, and suppressing the battery swelling associated with the charge and the discharge. Also, the present invention relates to a negative electrode that can provide the non-aqueous secondary battery. [Solution] The negative electrode includes a negative electrode active material, including a composite of a material containing Si and O as constitution elements (atom ratio x of O to Si is 0.5≦x≦1.5) in combination with a carbon material, and graphite. The graphite has an average particle diameter dg(μm) of 4 to 20 μm. The material containing Si and O as constitution elements has an average particle diameter ds(μm) of 1 μm or more. The ratio ds/dg (i.e., ds to dg) is 0.05 to 1. The material containing Si and O as constitution elements has a crystallite diameter of 50 nm or less, the crystallite diameter is calculated from a half width at a (220) plane of Si obtained by an X-ray diffraction method, using Scherrer Formula. In 100 mass % of the composite of the material containing Si and O as constitution elements, and the carbon material, a ratio of the material containing Si and O as constitution elements is 70 to 95 mass %.||05-30-2013|
|20130078509||NON-AQUEOUS SECONDARY BATTERY - A non-aqueous secondary battery contains a positive electrode, a negative electrode, a separator and a non-aqueous electrolytic solution. The positive electrode contains a layered structure lithium-containing compound oxide, or a spinel lithium-containing compound oxide containing manganese as an active material. The non-aqueous electrolytic solution contains at least one additive selected from a sulfonic acid anhydride, a sulfonate ester derivative, a cyclic sulfate derivative and a cyclic sulfonate ester derivative, and a vinylene carbonate or a derivative of the vinylene carbonate.||03-28-2013|
|20130071758||NONAQUEOUS ELECTROLYTE FOR ELECTROCHEMICAL DEVICE, AND ELECTROCHEMICAL DEVICE - The nonaqueous electrolyte for an electrochemical device of the present invention includes at least one selected from an imide compound represented by the general formula (1) and an imide compound represented by the general formula (2):||03-21-2013|
|20120321939||FLAT BATTERY - Provided is a flat battery with a molded gasket extending from the opening edge of the seal can to the flat portion, where the gasket may be prevented from exfoliating from the inner surface of the seal can. A flat battery (||12-20-2012|
|20120276437||FLAT NONAQUEOUS SECONDARY BATTERY - A flat nonaqueous secondary battery with improved reliability is provided. The flat nonaqueous secondary battery (||11-01-2012|
|20110318631||ELECTROCHEMICAL DEVICE - The electrochemical device of the present invention comprises a positive electrode (||12-29-2011|
Patent applications by HITACHI MAXELL ENERGY, LTD.