Showing papers by "Kenji Hara published in 2005"

Positive electrode active material, non-aqueous electrolyte secondary battery and method for manufacturing positive electrode active material

Abstract: A non-aqueous electrolyte secondary battery that can restrict lowering of battery performance during battery preservation is provided. A negative electrode that a negative electrode mixture including graphite is applied on a rolled copper foil and a positive electrode that a positive electrode mixture including lithium manganate is applied on an aluminum foil are used. An oxide in which one element selected from Al, Si, Ti, V, Cr, Fe, Ni, Cu, Zn, Zr, Mo, W, Pb and dissimilar to elements constituting the lithium manganate is oxidized is intermixed with the lithium manganate. An intermixture amount of the oxide is set such that a molar number of the dissimilar element contained in one gram of the positive electrode active material to a molar number of lithium contained in one gram of the positive electrode active material is not more than 5/1000. Charge transfer is restricted by the oxide during battery preservation.

Successful DNA typing of urine stains using a DNA purification kit following dialfiltration.

Abstract: To evaluate the utility of DNA polymorphism typing of urine stains in forensic investigations, the amplifiable amount of DNA was estimated in 20 urine specimens obtained from 10 male and 10 female volunteers using a DNA purification kit following dialfiltration. DNA obtained from both urine and urine stains was amplified with the AmpflSTR® Profiler™ PCR Amplification Kit, and was analyzed by capillary electrophoresis using the Genetic Analyzer. The amount of male and female urine necessary for obtaining a complete DNA profile was 0.2mL and 0.08 mL, respectively. When 0.2mL of male urine were used to create urine stains, complete DNA profiles could be obtained from just some of the stains. However, when only 0.1mL of female urine was used, complete profiles could be successfully obtained from all of the stains. DNA on bleached cotton remained amplifiable for 3–6 weeks. This method using a DNA purification kit following dialfiltration can be recommended for the genotyping of urine stains.

Method for manufacturing carbon black for tire tread

Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing carbon black qualified in high compatibility between wear resistance and low heat generation when used in a tire tread formulation, particularly aiming at surface properties of the carbon black. SOLUTION: This method for manufacturing carbon black satisfies following formulas (1) and (2): (1) 2.00≤α≤9.00, (2) -2.5×α+85.0≤β≤90.0, wherein α=t 1 ×T 1 , β=t 2 ×T 2 , t 1 (second) represents a residence time of a crude hydrocarbon from introduction of the hydrocarbon into a high temperature gas flow up to introduction of a quenching medium, T 1 (°C) represents an average reaction temperature in this space, t 2 (second) represents a residence time of a reactive gas flow from introduction of the quenching medium up to passage of the medium through a reaction termination zone, T 2 (°C) represents an average reaction temperature in this space. The carbon black is provided using the method. COPYRIGHT: (C)2006,JPO&NCIPI

Nonaqueous electrolytic solution, and lithium secondary battery using its nonaqueous electrolytic solution

Abstract: PROBLEM TO BE SOLVED: To suppress reduction of charge and discharge efficiency in a cycle test of a battery, and maintain a battery capacity high after the cycle test. SOLUTION: A nonaqueous electrolytic solution containing carboxylic acid anhydride is used. As the carboxylic acid anhydride, it is preferable to use asymmetric carboxylic acid anhydride in which a pair of organic groups positioned in a side chain is constituted of mutually different organic groups. COPYRIGHT: (C)2007,JPO&INPIT

Lithium secondary battery and positive electrode material for lithium secondary battery

Abstract: PROBLEM TO BE SOLVED: To provide a lithium secondary battery endowed with higher output under low-temperature environment and with life improved. SOLUTION: The lithium-ion secondary battery has an electrode plate group with a cathode plate with a cathode mixture containing a cathode active material coated on aluminum foil and an anode plate containing an anode active material wound around through a separator. The electrode group is immersed in nonaqueous electrolyte solution and housed in a bottomed cylindrical battery can. Amorphous carbon is used for the anode active material. The cathode active material is obtained by sintering nickel sulfate, cobalt sulfate, manganese sulfate, and lithium carbonate at 850 to 1,050°C for eight hours. Lithium manganese nickel cobalt complex oxide thus obtained has a tapping density of 1.6 g/cm 3 , and an angle of repose of 50°, with a lamellar crystal structure. The nonaqueous electrolyte solution is permeated in the lithium manganese nickel cobalt complex oxide on which, the cathode mixture is evenly coated. COPYRIGHT: (C)2006,JPO&NCIPI

Positive electrode active material including a lithium transition metal complex oxide and an oxide of a dissimilar element

Abstract: A non-aqueous electrolyte secondary battery that can restrict lowering of battery performance during battery preservation is provided. A negative electrode that a negative electrode mixture including graphite is applied on a rolled copper foil and a positive electrode that a positive electrode mixture including lithium manganate is applied on an aluminum foil are used. An oxide in which one element selected from Al, Si, Ti, V, Cr, Fe, Ni, Cu, Zn, Zr, Mo, W, Pb and dissimilar to elements constituting the lithium manganate is oxidized is intermixed with the lithium manganate. An intermixture amount of the oxide is set such that a molar number of the dissimilar element contained in one gram of the positive electrode active material to a molar number of lithium contained in one gram of the positive electrode active material is not more than 5/1000. Charge transfer is restricted by the oxide during battery preservation.