Abstract: A lithium-ion battery with high safety is provided. A lithium-ion battery 20 includes an electrode group 6, an electrolyte, and a battery container 5 that contains the electrode group 6 and the electrolyte. The electrode group 6 is formed by stacking a positive electrode and a negative electrode via a separator. The positive electrode contains a composite oxide of lithium, nickel, manganese, and cobalt as a main positive active material. The negative electrode contains amorphous carbon as a main negative active material. The lithium-ion battery 20 has a discharge capacity of 20 Ah or more. The ratio (the value of Y/X) of a volume Y occupied by the electrolyte to a volume X of a void space in the battery container 5 is 0.65 or more.

Abstract: A lithium-ion battery with high safety is provided. A lithium-ion battery 20 includes an electrode group 6, an electrolyte, and a battery container 5 that contains the electrode group 6 and the electrolyte. The electrode group 6 is formed by stacking a positive electrode and a negative electrode via a separator. The positive electrode contains a composite oxide of lithium, nickel, manganese, and cobalt as a main positive active material. The negative electrode contains amorphous carbon as a main negative active material. The lithium-ion battery 20 has a discharge capacity of 20 Ah or more. The ratio (the value of Y/X) of a volume Y occupied by the electrolyte to a volume X of a void space in the battery container 5 is 0.65 or more.

Abstract: A lithium ion secondary battery having excellent input characteristics and safety is provided. The lithium ion secondary battery includes an electrode group made up of a positive electrode, a negative electrode, and a separator and an electrolytic solution provided in a battery container, the positive electrode has a current collector and a positive electrode composite applied to both surfaces of the current collector, the positive electrode composite contains layered lithium nickel manganese cobalt composite oxide as a positive electrode active material, an application quantity of the positive electrode composite to one surface is 110 to 170 g/m2, a density of the positive electrode composite is 2.5 to 2.8 g/cm3, the negative electrode has a current collector and a negative electrode composite applied to both surfaces of the current collector, and the negative electrode composite contains easily graphitizable carbon as a negative electrode active material.

Abstract: The present invention is to provide a base material for a laminate having a high strength, reduced thickness, and light weight. In the present invention, a base material is prepared by incorporating a thermosetting resin binder into a non-woven fabric of para-aramid fibers prepared by a wet type paper making, and then heating a plurality of the resultant non-woven fabric sheets under pressure. The non-woven fabric sheet comprises 95 to 70 mass % of the para-aramid fibers and 5 to 30 mass % of the thermosetting resin binder.

Abstract: An electrically insulating non-woven fabric having a main component of poly-p-phenileneterephthalamide fibers bonded with each other by a binder of thermosetting resin and a second binder of one selected from fiber chops, fiber pulps and fibrids of thermoplastic resin having a softening point of 220° C. or higher, the poly-p-phenileneterephthalamide fibers being pulps or both of chops and pulps with a blend mass ratio of the chops to the pulps being 0/100 through 95/5 and preferably 50/50 through 90/10, a fiber length of the poly-p-phenileneterephathalamide fiber chops being preferably 3 to 6 mm, a content of the thermosetting resin binder in the non-woven fabric being 5 to 30 mass % and a content of the second binder being is 5 to 15 mass %.

Abstract: The present invention is to provide a base material for a laminate having a high strength, reduced thickness, and light weight. In the present invention, a base material is prepared by incorporating a thermosetting resin binder into a non-woven fabric of para-aramid fibers prepared by a wet type paper making, and then heating a plurality of the resultant non-woven fabric sheets under pressure. The non-woven fabric sheet comprises 95 to 70 mass % of the para-aramid fibers and 5 to 30 mass % of the thermosetting resin binder.

Abstract: The present invention is to provide a base material for a laminate having a high strength, reduced thickness, and light weight. In the present invention, a base material is prepared by incorporating a thermosetting resin binder into a non-woven fabric of para-aramid fibers prepared by a wet type paper making, and then heating a plurality of the resultant non-woven fabric sheets under pressure. The non-woven fabric sheet comprises 95 to 70 mass % of the para-aramid fibers and 5 to 30 mass % of the thermosetting resin binder.

Abstract: The present invention is to provide a base material for a laminate having a high strength, reduced thickness, and light weight. In the present invention, a base material is prepared by incorporating a thermosetting resin binder into a non-woven fabric of para-aramid fibers prepared by a wet type paper making, and then heating a plurality of the resultant non-woven fabric sheets under pressure. The non-woven fabric sheet comprises 95 to 70 mass % of the para-aramid fibers and 5 to 30 mass % of the thermosetting resin binder.

Abstract: A non-aqueous liquid electrolyte secondary cell capable of preventing bursting or explosion thereof even when a current breaking device or a relief valve for pressure release fails in operation thereof due to any trouble or failure thereof. The cell includes a wound-up body formed by laminatedly spirally winding up a positive electrode and a negative electrode together while interposing a separator therebetween. The wound-up body thus formed is received in a cell can. The negative electrode is constructed by forming a negative active material layer containing amorphous carbon on each of both surfaces of a negative collector. The positive electrode is constructed by forming a positive active material layer containing LixCoO.sub.2 on each of both surfaces of a positive collector. The negative electrode is electrically connected to the cell can through a negative electrode lead.