摘要:
Provided is a nonaqueous electrolyte secondary battery 10 which, in cases where separators 70 each having a heat-resistant layer 74 on only one face thereof are used, has an excellent thermal stability and thus a higher safety and reliability when the battery 10 reaches a high temperature. Such a nonaqueous electrolyte secondary battery 10 includes a positive electrode 30 in which a positive electrode active material layer 34 is provided on both faces of a positive electrode current collector 32, a negative electrode 50 in which a negative electrode active material layer 54 is provided on both faces of a negative electrode current collector 52, at least two separators 70 each having a heat-resistant layer 74 on one face of a base material 72, and an electrolyte. The nonaqueous electrolyte secondary battery has an electrode assembly 20 in which the positive electrode 30 and the negative electrode 50 are stacked on top of one another with the separators 70 interposed therebetween. The at least two separators 70 are disposed in such a way that, for each separator, the heat-resistant layer 74 is positioned on the same side with respect to the base material 72 in the stacking direction.
摘要:
The lithium rechargeable battery of the present invention is provided with a current collector and an active material layer containing active material particles 10 supported on this current collector. The active material particles 10 are secondary particles 14 in which a plurality of primary particles 12 of a lithium transition metal oxide are aggregated, and have a hollow structure that contains a hollow section 16 formed inside the secondary particle 14 and a shell section 15 that surrounds the hollow section 16. A through hole 18 that penetrates from the outside to the hollow section 16 is formed in the secondary particle 14. The ratio (A/B) in a powder x-ray diffraction pattern of the active material particles 10, where A is the full width at half maximum of the diffraction peak obtained for the (003) plane and B is the full width at half maximum of the diffraction peak obtained for the (104) plane, satisfies the equation (A/B)≦0.7.
摘要:
A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. The positive electrode of this secondary battery contains a positive electrode active substance having a hollow structure, which has a shell portion and a hollow portion formed inside the shell portion. In addition, a heat-resistant barrier layer is disposed between the positive electrode and the separator.
摘要:
A secondary battery according to the present invention has a current collector and a positive electrode mixture layer that coats the current collector. The positive electrode mixture layer includes a positive electrode active material, an electrically conductive material, and a binder, and the positive electrode active material is constituted by hollow-structure secondary particles formed by the aggregation of a plurality of primary particles of a lithium transition metal oxide and has a through hole penetrating from outside to a hollow portion. In addition, a particle porosity A1 of the positive electrode active material satisfies 2.0(%)≦A1≦70(%). Furthermore, a DBP absorption A2 of the positive electrode active material satisfies 23 (mL/100 g)≦A2. Moreover, the tap density A3 of the positive electrode active material satisfies 1.0 (g/mL)≦A3≦1.9 (g/mL).
摘要:
Provided is a lithium secondary battery that comprises a positive electrode having a positive electrode active material, a negative electrode having a negative electrode active material, and a non-aqueous electrolyte. The positive electrode active material is a nickel-containing lithium complex oxide having a layered structure. The oxide has a composition in which W and Zr are added, and contains no Nb.
摘要:
A porosity X of a positive electrode mixture layer 223 of a secondary battery 100 is 30(%)≦X. A mass ratio α of a positive electrode active material 610 in the positive electrode mixture layer 223 is 0.84≦α≦0.925 and a mass ratio β of a conductive material 620 in the positive electrode mixture layer 223 is 0.06≦β≦0.12. In the secondary battery 100, an index Y worked out from an expression below is 30 (mL/100 g)≦Y≦89 (mL/100 g). The index Y is given by the expression below, Y=A×α+B×β; where A is a DBP absorption number (mL/100 g) in the positive electrode active material 610; α is the mass ratio of the positive electrode active material 610 in the positive electrode mixture layer 223; B is a DBP absorption number (mL/100 g) of the conductive material 620; and β is the mass ratio of the conductive material 620 in the positive electrode mixture layer 223.
摘要:
A photoelectric conversion material is obtained through easy processing from a substance containing silicon oxide, which is inexpensive, imposes no burden on the environment, and is stable, as a component. This material can be used in a photocell and a secondary photocell. Any of synthetic quartz, fused quartz glass, soda-lime glass, non-alkali glass, and borosilicate glass, which are compositions containing silicon oxide, is pulverized, immersed in an aqueous solution of halogen acid, washed with water, and dried. The resultant material is deposited on an electrode plate and this electrode plate is placed in water where an appropriate electrolyte is mixed. This electrode plate is electrically connected to an opposite electrode to provide a photoelectrode. The material may be enclosed in a container, mixed with an organic electrolyte, having an extraction electrode and an opposite electrode, to provide a photocell.
摘要:
An electrode is provided with a metal terminal extending from a battery module main body, a bolt which has an expanded section configuring a retaining section at a rear end portion and penetrates the metal terminal upward, and an insulating body which insulates the metal terminal and the battery module case one from the other. The insulating body is provided with a drop preventing section which abuts at least a lower surface of the expanded section of the bolt and prevents the bolt from dropping from the metal terminal.
摘要:
A battery pack includes: a chargeable and dischargeable battery; and a microcomputer that acquires information on a voltage drop across the battery in a condition equivalent to no load and stores the information therein.
摘要:
A porosity X of a positive electrode mixture layer 223 of a secondary battery 100 is 30(%)≦X. A mass ratio α of a positive electrode active material 610 in the positive electrode mixture layer 223 is 0.84≦α≦0.925 and a mass ratio β of a conductive material 620 in the positive electrode mixture layer 223 is 0.06≦β≦0.12. In the secondary battery 100, an index Y worked out from an expression below is 30 (mL/100 g)≦Y≦89 (mL/100 g). The index Y is given by the expression below, Y=A×α+B×β; where A is a DBP absorption number (mL/100 g) in the positive electrode active material 610; α is the mass ratio of the positive electrode active material 610 in the positive electrode mixture layer 223; B is a DBP absorption number (mL/100 g) of the conductive material 620; and β is the mass ratio of the conductive material 620 in the positive electrode mixture layer 223.