Abstract: Provided is a coin-shaped lithium ion secondary battery including a positive electrode layer, a negative electrode layer, a separator interposed between, an electrolytic solution, and an exterior body having a coin shape with a bulge on at least one surface and comprising a closed space accommodating the positive electrode layer, the negative electrode layer, the separator, and the electrolytic solution. The lithium ion secondary battery has a main region where all of the positive electrode layer, the negative electrode layer, and the separator overlap and a peripheral region which is devoid of at least one of the positive electrode layer, the negative electrode layer, and the separator, wherein a battery bulge ratio that is the ratio of the maximum thickness of the lithium ion secondary battery in the main region to the minimum thickness of the lithium ion secondary battery in the main region is 1.01 to 1.25.

Abstract: A lithium secondary battery includes a positive electrode composed of a sintered body containing lithium cobaltate, a negative electrode, and a separator composed of a sintered body containing magnesia interposed between the positive electrode and the negative electrode. The lithium secondary battery further includes an intermediate layer between the positive electrode and the separator, the intermediate layer containing an oxide containing Co and Mg.

Abstract: Provided is an all-solid lithium battery including: a low-angle oriented positive electrode plate that is a lithium complex oxide sintered plate having a porosity of 10 to 50%; a negative electrode plate containing Ti and capable of intercalating and deintercalating lithium ions at 0.4 V or higher (vs. Li/Li+); and a solid electrolyte having a melting point lower than the melting point or pyrolytic temperature of the oriented positive electrode plate or the negative electrode plate, wherein at least 30% of pores in the oriented positive electrode plate is filled with the solid electrolyte in an observation of a cross-section perpendicular to a main face of the oriented positive electrode plate.

Abstract: Provided is a lithium ion secondary battery including (a) a unit cell including a positive electrode layer composed of a lithium complex oxide sintered body, a negative electrode layer composed of a titanium-containing sintered body, a ceramic separator interposed therebetween, and an electrolyte, (b) a current collecting layer on each of both sides or the surface on the negative electrode layer side of the unit cell, and (c) an exterior body including a closed space, which accommodates the unit cell. The positive electrode layer, the ceramic separator, the negative electrode layer, and the current collecting layer form one integrated sintered body as a whole, whereby these components are bonded together, and in cross-sectional observation of the interface between the current collecting layer and the negative electrode layer, the proportion of the region in which these layers are in direct contact at the interface is 45 to 90%.

Abstract: Provided is a lithium secondary battery including: a positive electrode plate which is a lithium complex oxide sintered plate; a negative electrode layer containing carbon; a separator interposed between the positive electrode plate and the negative electrode layer; and an electrolytic solution with which the positive electrode plate, the negative electrode layer, and the separator are impregnated, wherein the positive electrode plate has a thickness of 70 to 120 ?m, the negative electrode layer has a thickness of 90 to 170 ?m, the lithium secondary battery has a rectangular flat plate shape with each side having a length of 20 to 55 mm, the lithium secondary battery has a thickness of 350 to 500 ?m, and the lithium secondary battery has an energy density of 200 to 300 mWh/cm3.

Abstract: Provided is a secondary battery including: a positive electrode plate composed of an inorganic material containing a positive electrode active material in an oxide form and having a thickness of 25 ?m or more; a negative electrode plate composed of an inorganic material containing a negative electrode active material in an oxide form and having a thickness of 25 ?m or more; and an inorganic solid electrolyte, the secondary battery being charged and discharged at a temperature of 100° C. or higher.

Abstract: Provided is a lithium-ion assembled battery including a plurality of lithium-ion unit cells connected to each other in series, and Zener diodes connected to the respective unit cells in parallel, and the Zener diode is characterized in that a current of 1/200 or less of a capacity of the unit cell flows at a mean voltage of the unit cell.

Abstract: Provided is a lithium secondary battery including a positive electrode layer composed of a lithium complex oxide sintered body and having a thickness of 70 ?m or more; a negative electrode layer composed of a titanium-containing sintered body and having a thickness of 70 ?m or more; a separator interposed between the positive electrode layer and the negative electrode layer; an electrolyte with which at least the separator is impregnated; and an outer package comprising a closed space, the closed space accommodating the positive electrode layer, the negative electrode layer, the separator, and the electrolyte, wherein the lithium secondary battery has a property that the resistance value decreases as the state of charge (SOC) increases from 10% to 80%.

Abstract: The present invention provides a secondary battery, including a positive electrode plate composed of an inorganic material including a positive electrode active material in an oxide form and having a thickness of 25 ?m or more; a negative electrode plate composed of an inorganic material including a negative electrode active material in an oxide form and having a thickness of 25 ?m or more; and an inorganic solid electrolyte layer, wherein the secondary battery is chargeable and dischargeable at a temperature of 100° C. or more. The present invention can provide rapid charge/discharge at a high cycle capacity retention and increase the capacity of the secondary battery.

Abstract: Provided is a lithium titanate sintered plate having a structure in which a plurality of primary grains are bound together. The lithium titanate sintered plate has a composition represented by the general formula Li4(Ti5-?M?)O12-?, wherein M is at least one selected from the group consisting of Nb, Ta, and W; ? satisfies 0???2.5; and ? denotes oxygen-deficient amount, and may be 0, provided that ? and ? are not 0 at the same time.

Abstract: Disclosed is a lithium complex oxide sintered plate including a plurality of primary grains having a layered rock-salt structure, the primary grains being bonded. The lithium complex oxide has a composition represented by the formula: Lix(Co1-yMy)O2±? (wherein, 1.0?x?1.1, 0<y?0.1, 0??<1, and M is at least one selected from the group consisting of Mg, Ni, Al, and Mn), and the primary grains have a mean tilt angle of more than 0° to 30° or less, the mean tilt angle being a mean value of the angles defined by the (003) planes of the primary grains and the plate face of the lithium complex oxide sintered plate.

Abstract: Disclosed is a lithium complex oxide sintered plate for use in a positive electrode of a lithium secondary battery. The lithium complex oxide sintered plate has a structure in which a plurality of primary grains having a layered rock-salt structure are bonded, and has a porosity of 3 to 30%, a mean pore diameter of 15 ?m or less, an open pore rate of 70% or more, a thickness of 40 to 200 ?m, a primary grain diameter of 20 ?m or less, the primary grain diameter being a mean diameter of the primary grains, and a pore diameter distribution in which the number of peaks is one and volume-based D10, D50 and D90 pore diameters satisfy expressions: D50/D10?2.5, D90/D50?2.5 and D90/D10?8.0.

Abstract: Provided is a lithium complex oxide sintered plate for use in a positive electrode of a lithium secondary battery. The lithium complex oxide sintered plate has a structure in which a plurality of primary grains having a layered rock-salt structure are bonded, and has a porosity of 3 to 40%, a mean pore diameter of 15 ?m or less, an open porosity of 70% or more, and a thickness of 15 to 200 ?m. The plurality of primary grains has a primary grain diameter, i.e., a mean diameter of the primary grains, of 20 ?m or less and a mean tilt angle of more than 0° to 30° or less. The mean tilt angle is a mean value of the angles defined by the (003) planes of the primary grains and the plate face of the lithium complex oxide sintered plate.

Abstract: Provided is a lithium titanate sintered plate for use in a negative electrode of a lithium secondary battery. The lithium titanate sintered plate has a structure in which a plurality of primary grains are bonded, and has: a thickness of 10 to 290 ?m; a primary grain diameter of 0.70 ?m or less, the primary grain diameter being a mean grain diameter of the primary grains; a porosity of 21 to 45%; an open pore rate of 60% or more; a mean pore aspect ratio of 1.15 or more; a ratio of 30% or more of pores having an aspect ratio of 1.30 or more to all the pores; and a mean pore diameter of 0.70 ?m or less, wherein volume-based D10 and D90 pore diameters satisfy the relationship: 4.0?D90/D10?50.

Abstract: Provided is a lithium complex oxide sintered plate for use in a positive electrode of a lithium secondary battery. The lithium complex oxide sintered plate has a structure in which a plurality of primary grains having a layered rock-salt structure are bonded, and has a porosity of 3 to 40%, a mean pore diameter of 15 ?m or less, an open porosity of 70% or more, and a thickness of 15 to 200 ?m. The plurality of primary grains has a primary grain diameter, i.e., a mean diameter of the primary grains, of 20 ?m or less and a mean tilt angle of more than 0° to 30° or less. The mean tilt angle is a mean value of the angles defined by the (003) planes of the primary grains and the plate face of the lithium complex oxide sintered plate.

Abstract: Provided is a lithium secondary battery including a positive electrode layer composed of a lithium complex oxide sintered body, a negative electrode layer composed of a titanium-containing sintered body, a ceramic separator interposed between the positive electrode layer and the negative electrode layer, an electrolyte with which at least the ceramic separator is impregnated, and an exterior body including a closed space, the closed space accommodating the positive electrode layer, the negative electrode layer, the ceramic separator, and the electrolyte. The positive electrode layer, the ceramic separator, and the negative electrode layer form one integrated sintered plate as a whole, and the entirety of the integrated sintered plate is coated with a metal oxide layer.

Abstract: Disclosed is a lithium complex oxide sintered plate for use in a positive electrode of a lithium secondary battery. The lithium complex oxide sintered plate has a structure where a plurality of primary grains having a layered rock-salt structure are bonded, and has a porosity of 3 to 30%, a mean pore diameter of 15 ?m or less, an open pore rate of 70% or more, and a thickness of 40 to 200 ?m. The primary grains have a primary grain diameter of 20 ?m or less, the primary grain diameter being a mean diameter of the primary grains, and a pore diameter distribution includes a first peak corresponding to a pore diameter of more than 0 ?m to 1.2 ?m or less and a second peak corresponding to a pore diameter which is larger than the pore diameter corresponding to the first peak and is 20 ?m or less.

Abstract: A lithium composite oxide sintered body plate includes a porous structure in which a plurality of primary particles of a lithium composite oxide having a layered rock-salt structure are bonded is included, in which a porosity is 15 to 50%, a ratio of the primary particles whose average inclination angle being an average value of angles between a (003) plane of the plurality of primary particles and a plate surface of the sintered body plate is more than 0° and 30° or less is 60% or more, one or more additive elements selected from Nb, Ti, W are contained, and an addition amount of the one or more additive elements to an entire of the sintered body plate is 0.01 wt % or more and 2.0 wt % or less.

Abstract: A coin-type lithium secondary cell for soldering by reflow method includes a positive electrode including a lithium composite oxide, a negative electrode, an electrolyte layer provided between the positive electrode and the negative electrode and including an electrolytic solution, a cell case having an enclosed space in which the positive electrode, the negative electrode, and the electrolyte layer are housed. The positive electrode and the negative electrode as a whole contains 3.0% by mass or less of lithium carbonate.

Abstract: A coin-type secondary cell for soldering by reflow method includes a positive electrode, a negative electrode, an electrolyte layer, and a cell case. The cell case has an enclosed space in which the positive electrode, the negative electrode, and the electrolyte layer are housed. The cell case includes a positive electrode can, a negative electrode can, and a gasket. The positive electrode can and the negative electrode can have plate thicknesses of 0.075 to 0.25 mm and are different in plate thickness.