Patent application number | Description | Published |
20110097627 | NEGATIVE ELECTRODE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERIES, MANUFACTURING METHOD THEREFOR, AND LITHIUM-ION SECONDARY BATTERIES - The present invention is a negative electrode material for non-aqueous electrolyte secondary batteries, comprising at least: particles wherein silicon nanoparticles are dispersed in silicon oxide (silicon oxide particles); and a metal oxide coating formed on a surface of the silicon oxide particles. As a result, there is provided a negative electrode material for non-aqueous electrolyte secondary batteries that enables the production of a negative electrode suitable for lithium-ion secondary batteries and the like that provides improved safety and cycle performance over conventional negative electrode materials. | 04-28-2011 |
20120107679 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - The present invention is a non-aqueous electrolyte secondary battery including at least a positive electrode, a negative electrode and a non-aqueous electrolyte, the positive and negative electrodes being capable of occluding and emitting lithium ions, wherein the negative electrode is composed of particles each having a structure that silicon nanoparticles are dispersed to silicon oxide, each of the particles is coated with a carbon coating, and the non-aqueous electrolyte includes lithium oxalatoborate in the range of 5 to 10 mass %, as the electrolyte. As a result, there is provided a non-aqueous electrolyte secondary battery having high capacity, superior first charge and discharge efficiency, superior cycle performance, and high safety, while a manufacturing method and structure thereof are not complex. | 05-03-2012 |
20130078516 | NEGATIVE ELECTRODE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - The present invention provides a negative electrode material for a non-aqueous electrolyte secondary battery that includes particles of a silicon-based active material, the particles of a silicon-based active material being coated with a film of an organosilicon compound that contains a perfluoropolyether group, and a non-aqueous electrolyte secondary battery therewith. As a result, there is provided a negative electrode material for a non-aqueous electrolyte secondary battery that is high in capacity, excellent in initial charge/discharge efficiency and cycle characteristics and high in safety and reliability, and a non-aqueous electrolyte secondary battery that uses the negative electrode material. | 03-28-2013 |
20130108923 | NEGATIVE ELECTRODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR MANUFACTURING THE SAME | 05-02-2013 |
20130334468 | NEGATIVE ELECTRODE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR MANUFACTURING THE SAME - The present invention provides a method for manufacturing a negative electrode material for a nonaqueous electrolyte secondary battery, which includes the steps of: preparing silicon nanoparticles; manufacturing the silicon-carbon composite material that contains the silicon nanoparticles and a carbonaceous material; and heat-compressing the silicon-carbon composite material. As a result, there is provided a negative electrode material for a nonaqueous electrolyte secondary battery, which has a high capacity and excellent initial charge/discharge efficiency and cycle characteristics and a method for manufacturing the same, and a nonaqueous electrolyte secondary battery that uses the negative electrode material for a nonaqueous electrolyte secondary battery. | 12-19-2013 |
20140038050 | SILICON-CONTAINING PARTICLES, NEGATIVE ELECTRODE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY USING THE SAME, NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND METHOD OF MANUFACTURING SILICON-CONTAINING PARTICLES - The present invention intends to provide silicon-containing particles that, when used as a negative electrode active material for a nonaqueous electrolyte secondary battery, can form a nonaqueous electrolyte secondary battery that is less in volume change during charge/discharge and has high initial efficiency and excellent cycle characteristics. The present invention provides silicon-containing particles that are used as a negative electrode active material for a nonaqueous electrolyte secondary battery and have a diffraction line with a peak at 2θ=28.6° in X-ray diffractometry, a negative electrode material for a nonaqueous electrolyte secondary battery therewith, a nonaqueous electrolyte secondary battery, and a method of manufacturing the silicon-containing particles. | 02-06-2014 |
20150251915 | METHOD OF MANUFACTURING SILICON-CONTAINING PARTICLES FOR USE IN NEGATIVE ELECTRODE ACTIVE MATERIAL OF NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, NEGATIVE ELECTRODE MATERIAL FOR USE IN THE BATTERY, NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND THE SILICON-CONTAINING PARTICLE - The present invention manufactures silicon-containing particles for use in a negative electrode active material of a non-aqueous electrolyte secondary battery by obtaining the silicon-containing particles by a deposition method and performing a heat treatment on the silicon-containing particles under a reducing atmosphere at, for example, 400° C. to 1100° C. The silicon-containing particles manufactured by this method have an oxygen content ranging from 0.1 to 1.5 mass %. These silicon-containing particles enable manufacture of a non-aqueous electrolyte secondary battery that has a high initial efficiency and an excellent cycle performance and exhibits a small volume variation upon charging and discharging. | 09-10-2015 |
20150380726 | SILICON-CONTAINING PARTICLE, NEGATIVE-ELECTRODE MATERIAL FOR USE IN NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A silicon-containing particle is provided for use as a negative-electrode active material of a non-aqueous electrolyte secondary battery, wherein a crystal grain size is 300 nm or less, the crystal grain size being obtained by a Scherrer method from a full width at half maximum of a diffraction line attributable to Si and near 2θ=28.4° in an x-ray diffraction pattern analysis, and a true density is more than 2.320 g/cm | 12-31-2015 |