摘要:
A non-aqueous lithium-type power storage element obtained by a non-aqueous liquid electrolyte and an electrode laminate having a negative electrode body, a positive electrode body, and a separator being accommodated in an exterior body, wherein: the negative electrode body contains a negative electrode current collector and a negative electrode active material including a carbon material capable of occluding and releasing lithium ions; the negative electrode active material is selected from composite porous materials in which a carbonaceous material is caused to adhere to activated carbon and composite porous materials in which a carbonaceous material is caused to adhere to carbon black, and is doped with lithium ions at 530-2500 mAh/g per unit weight of the composite porous material; the non-aqueous electrolytic solution contains 0.5 mol/L or more of a lithium salt; and an extract obtained by extracting a negative electrode active material layer using water contains (a)SO 3 2- ions and/or (b)SO 4 2- ions in a range of 3.0 × 10 -8 to 5.0 × 10 -6 mol/m 2 per unit surface area of the negative electrode active material layer.
摘要:
Provided is a lithium ion capacitor that is capable, during internal short circuiting, of suppressing an increase in capacitor temperature and controlling the onset of gasification, smoking and ignition, and of having preferably both low resistance (i.e., high output density) and high cycle characteristics. The lithium ion capacitor comprises an electrode laminated body stored in a casing together with a non-aqueous electrolytic solution containing a lithium ion-containing electrolyte; wherein the electrode laminated body is laminated so that a negative electrode collector having a negative electrode active material comprised of a carbon material, and a positive electrode body having a positive electrode active material face each other through a laminated separator where a polyolefin porous membrane and an insulating porous membrane are laminated; and characterized in that the insulating porous membrane is in contact with the negative electrode body.
摘要:
A separator for an electricity storage device has a cross-sectional crystal orientation of 0.85 or greater, and/or a method for producing the separator for an electricity storage device comprises a step of using a continuous mixer under conditions with a temperature of 20°C to 70°C, a shear rate of 100 to 400,000 seconds -1 and a residence time of 1.0 seconds to 60 seconds, for mixing of polyethylene-containing polyolefin powder with a plasticizer to produce a mixed slurry, a step of extruding the mixed slurry and cooling it to solidification to process it into a cast sheet, and a step of biaxially stretching the cast sheet to an area increase factor of 20 to 200.
摘要:
A non-aqueous lithium-type power storage element comprising an electrode laminate body and a non-aqueous electrolyte being housed in an external body, the electrode laminate body having a negative electrode body, a positive electrode body and a separator. The negative electrode body has a negative current collector and a negative electrode active material layer that includes a negative electrode active material and that is provided to one or both surfaces of the negative current collector. The negative electrode active material includes a carbon material that can occlude and release lithium ions. The positive electrode body has a positive current collector and a positive electrode active material layer that includes a positive electrode active material and that is provided to one or both surfaces of the positive current collector. The positive electrode active material includes activated carbon. The non-aqueous electrolyte contains, based on the total amount of the non-aqueous electrolyte, 0.5 mol/L or more of a lithium salt, and the negative electrode active material layer includes, per unit weight of the negative electrode active material, 2.6 x 10-6-2, 000 x 10 -6 mol/g of a specific sulfur compound.
摘要:
A polyolefin microporous membrane that includes ultrahigh molecular weight polyethylene (UHMWPE) having a viscosity-average molecular weight (Mv), determined as described in the description, of 300,000 to 9,000,000, wherein the polyolefin microporous membrane is suitable for use as a separator for an electricity storage device, the degree of crystallinity of the polyethylene of the polyolefin microporous membrane, determined as described in the description, is 80 to 99% as measured by X-ray diffraction (XRD), and the crystallite size of the polyethylene of the polyolefin microporous membrane determined as described in the description, is 14.2 to 40.0 nm as measured by XRD.
摘要:
A non-aqueous lithium-type power storage element obtained by a non-aqueous liquid electrolyte and an electrode laminate having a negative electrode body, a positive electrode body, and a separator being accommodated in an exterior body, wherein: the negative electrode body contains a negative electrode current collector and a negative electrode active material including a carbon material capable of occluding and releasing lithium ions; the negative electrode active material is selected from composite porous materials in which a carbonaceous material is caused to adhere to activated carbon and composite porous materials in which a carbonaceous material is caused to adhere to carbon black, and is doped with lithium ions at 530-2500 mAh/g per unit weight of the composite porous material; the non-aqueous electrolytic solution contains 0.5 mol/L or more of a lithium salt; and an extract obtained by extracting a negative electrode active material layer using water contains (a)SO 3 2- ions and/or (b)SO 4 2- ions in a range of 3.0 × 10 -8 to 5.0 × 10 -6 mol/m 2 per unit surface area of the negative electrode active material layer.
摘要:
Provided is a lithium ion capacitor that is safe and has a high energy density and a high output. Specifically provided is a lithium ion capacitor comprising, accommodated within an outer casing: an electrode stack obtained by stacking a negative electrode in which a negative-electrode active material layer including a carbon material as the negative-electrode active material is disposed on a negative-electrode collector, a separator comprising a polyethylene-containing polyolefin resin, and a positive electrode in which a positive-electrode active material layer including a positive-electrode active material layer comprising a carbon material or a carbonaceous material is disposed on a positive-electrode collector; and a non-aqueous electrolyte solution including a a lithium ion-containing electrolyte. The lithium ion capacitor is characterized in that the thermal contraction/expansion rate of the separator falls within a prescribed range, the surface area of the separator is greater than the surface area of the positive-electrode active material layer of the positive electrode or the surface area of the negative-electrode active material layer of the negative electrode, and the length of a section where the electrode surface and the separator do not overlap has a prescribed relationship to the size of the separator.