Abstract: A negative electrode including a negative electrode collector and a negative electrode active material layer on the collector. The layer contains a negative electrode active material capable of occluding and releasing lithium. The material in a fully charged state satisfies a conditional expression (1) in 7Li-MAS-NMR analysis: 0?(B/A)<0.1??(1), where A represents a sum of integrated area of a first peak and integrated area of a side band peak of the first peak, the first peak indicating a chemical shift in a range of ?1 ppm or more and 25 ppm or less with respect to a reference position where a resonant peak of a LiCl aqueous solution having a concentration of 1 mol/dm3 appears. B represents integrated area of a second peak indicating a chemical shift in a range of 25 ppm or more and 270 ppm or less with respect to the reference position.

Abstract: A secondary battery is provided. The secondary battery includes a cathode; an anode; and a non-aqueous electrolytic solution, wherein the cathode includes any one of a first lithium-containing compound and a second lithium-containing compound, the first lithium-containing compound having a bedded salt-type crystal structure, wherein the first lithium-containing compound includes one or more metal elements (M) other than lithium (Li), wherein the second lithium-containing compound having an olivine-type crystal structure, and wherein the nonaqueous electrolytic solution includes an unsaturated cyclic compound.

Abstract: A secondary battery includes: a cathode; an anode; and a non-aqueous electrolytic solution, wherein the cathode includes a second lithium-containing compound having an olivine-type crystal structure, a photoelectron spectrum of oxygen 1s obtained by surface analysis of the cathode with the use of X-ray photoelectron spectroscopy includes a third peak and a fourth peak, the third peak having an apex in a range in which binding energy is equal to or larger than 530 electron volts and less than 533 electron volts, and the fourth peak having an apex in a range in which binding energy is from 533 electron volts to 536 electron volts both inclusive and having spectrum intensity smaller than spectrum intensity of the third peak, and a ratio IE/ID between a spectrum intensity ID of the third peak and a spectrum intensity IE of the fourth peak is larger than ¼.

Abstract: An electrolytic solution for a secondary battery is provided. The electrolyte solution includes an electrolyte salt; and a solvent including a first solvent and a second solvent; wherein the first solvent includes 4-fluoro-1,3-dioxolane-2-one; and wherein the second solvent includes at least one of Chemical Formula No. 23, Chemical Formula No. 24, or Chemical Formula No. 25.

Abstract: A secondary battery includes: a cathode including an active material; an anode; and an electrolytic solution, and the active material includes a plurality of active material particles as primary particles and a carbon material. The active material particles contain a polyanion-based compound. The carbon material contains a first carbon material present on surfaces of the active material particles, and a second carbon material present between the active material particles provided with the first carbon material. A ratio B/A between a total carbon amount A and a surface carbon amount B of the active material satisfies 7<B/A<11.5. A ratio D/C between a specific surface area C of the active material, and an oil feed amount D of N-methyl-2-pyrrolidone satisfies 1.5<D/C?2.

Abstract: A secondary battery includes: a cathode; an anode including a carbon material; and non-aqueous electrolytic solution. A photoelectron spectrum of oxygen 1s is obtained from an analysis of the anode by X-ray photoelectron spectroscopy. A first peak positioned in vicinity of 1360 reciprocal centimeters and a second peak positioned in vicinity of 1580 reciprocal centimeters are obtained from an analysis of the carbon material by Raman spectroscopy. A half band width ?W1 of the photoelectron spectrum is about 3 electron volts or more. A half band width ?W2 of the second peak is about 19 reciprocal centimeters or more. A ratio I1/I2 of intensity I1 of the first peak to intensity I2 of the second peak is from about 0.15 to about 0.3 both inclusive.

Abstract: A battery with the high capacity, the superior cycle characteristics, and the superior initial charge and discharge efficiency, and an anode active material used for it are provided. The anode active material contains at least tin, cobalt, carbon, and phosphorus as an element. A carbon content is from 9.9 wt % to 29.7 wt %, a phosphorus content is from 0.1 wt % to 2.2 wt %, and a cobalt ration to the total of the tin and the cobalt is from 24 wt % to 70 wt %.

Abstract: A battery capable of reducing swelling is provided. A battery includes a cathode, an anode and an electrolyte. The anode includes a coating containing a SO3-containing compound, and the electrolyte contains an electrolyte salt having reduction power. Therefore, on the surface of the anode, the SO3-containing compound is preferentially reduced and decomposed to become a sulfur-containing compound. In the result, decomposition reaction of the electrolyte is prevented.

Abstract: An anode and a battery capable of improving battery characteristics such as cycle characteristics are provided. A coating containing at least one from the group consisting of oligomers having a polyene structure and derivatives thereof is provided on the surface of an anode active material layer. The anode active material layer contains a substance containing Si or Sn as an element as an anode active material. By the coating, oxidation of the anode active material layer is inhibited, and decomposition reaction of the electrolytic solution is inhibited.

Abstract: A secondary battery includes: a cathode; an anode; and a non-aqueous electrolytic solution, wherein the cathode includes a second lithium-containing compound having an olivine-type crystal structure, a photoelectron spectrum of oxygen 1s obtained by surface analysis of the cathode with the use of X-ray photoelectron spectroscopy includes a third peak and a fourth peak, the third peak having an apex in a range in which binding energy is equal to or larger than 530 electron volts and less than 533 electron volts, and the fourth peak having an apex in a range in which binding energy is from 533 electron volts to 536 electron volts both inclusive and having spectrum intensity smaller than spectrum intensity of the third peak, and a ratio IE/ID between a spectrum intensity ID of the third peak and a spectrum intensity IE of the fourth peak is larger than ¼.

Abstract: A secondary battery includes: a cathode; an anode; and an electrolytic solution. The cathode includes a lithium-containing compound having an average composition represented by a following Formula (1), the lithium-containing compound includes a central section and a surface section, a molar ratio b1 of manganese (Mn) in the surface section is larger than a molar ratio b2 of Mn in the central section, a molar ratio 1+a1 of lithium (Li) in the surface section is smaller than a molar ratio 1+a2 of Li in the central section, and a ratio 1+a1/1+a2 between the molar ratio 1+a1 of Li in the surface section and the molar ratio 1+a2 of Li in the central section satisfies 0.5<1+a1/1+a2<1, Li1+a(MnbCocNi1-b-c)1?aMdO2-e??(1) where M is one or more of aluminum, magnesium, zirconium, titanium, barium, boron, silicon, and iron; and a to e satisfy 0<a<0.25, 0.5?b<0.7, 0?c<1?b, 0?d?1, and 0?e?1.

Abstract: A positive electrode having a positive-electrode active material and used for a nonaqueous electrolyte cell is provided. The positive electrode includes a coating, wherein the coating contains at least one first compound for which a binding-energy peak in a phosphorus 2p spectrum obtained by X-ray photoelectron spectroscopy is in the range of 132 to 135 eV.

Abstract: A secondary battery capable of improving high-temperature characteristics is provided. The secondary battery includes a cathode, an anode and an electrolytic solution. A separator provided between the cathode and the anode is impregnated with the electrolytic solution. A solvent of the electrolytic solution includes a main solvent such as a cyclic carbonate which includes halogen and a sub solvent such as carbonate dimer.

Abstract: A current collector forming an electrode for battery. The electrode current collector is made of copper or a copper alloy, and has a front surface color and a back surface color, at least one color of which is a color belonging to a color space represented by: 50?L*?80, 5?a*<60, 5?b*<60, where L*, a*, and b* are numeric values determined based on the L*a*b* calorimetric system described in JIS Z 8729.

Abstract: A battery with a high capacity and superior cycle characteristics and an anode active material used in the battery are provided. An anode includes an anode active material capable of reacting with lithium. The anode active material includes at least tin, cobalt and carbon as elements, and the carbon content is within a range from 9.9 wt % to 29.7 wt % inclusive, and the ratio of cobalt to the total of tin and cobalt is within a range from 30 wt % to 70 wt % inclusive. Thereby, while a high capacity is maintained, cycle characteristics can be improved.

Abstract: A negative electrode includes a negative electrode collector and a negative electrode active material layer on the collector. The layer contains a negative electrode active material capable of occluding and releasing lithium. The material in a fully charged state satisfies a conditional expression (1) in 7Li-MAS-NMR analysis 0?(B/A)<0.1??(1). A represents a sum of integrated area of a first peak and integrated area of a side band peak of the first peak, the first peak indicating a chemical shift in a range of ?1 ppm or more and 25 ppm or less with respect to a reference position where a resonant peak of a LiCl aqueous solution having a concentration of 1 mol/dm3 appears. B represents integrated area of a second peak indicating a chemical shift in a range of 25 ppm or more and 270 ppm or less with respect to the reference position.

Abstract: A battery capable of improving battery characteristics such as cycle characteristics is provided. An electrolytic solution is impregnated in a separator. The electrolytic solution contains 4-fluoro-1,3-dioxolane-2-one. Fluorine ion content in the electrolytic solution is preferably from 10 weight ppm to 3200 weight ppm. Thereby, chemical stability of the electrolytic solution is improved, and cycle characteristics are improved. The present invention is effective for the case using an anode active material containing Sn or Si as an element for an anode.

Abstract: A battery capable of improving battery characteristics such as cycle characteristics is provided. A coating containing lithium fluoride and lithium hydroxide is provided on the surface of an anode active material layer. The ratio between lithium fluoride and lithium hydroxide is in the range, in which the Li2F+/Li2OH+ peak intensity ratio obtained in positive ion analysis by a Time of Flight-Secondary Ion Mass Spectrometry is 1 or more. The anode active material layer contains a substance containing Si or Sn as an element as an anode active material. By the coating, oxidation of the anode active material layer is inhibited, and decomposition reaction of the electrolytic solution is inhibited.

Abstract: A method for making a negative electrode component used in a nonaqueous secondary battery that includes the steps of polishing the surface of the negative electrode component by irradiating the surface with light to produce a negative electrode that includes a carbonaceous material in which the ratio RG=Gs/Gb is at least 4.5, where Gs is the degree of graphitization the carbonaceous material as determined by a surface-enhanced Raman spectrum and Gb is degree of graphitization of the carbonaceous material as determined by a Raman spectrum measured using argon laser light and both Gs and Gb are measured under set parameters.

Abstract: A battery capable of improving battery characteristics such as cycle characteristics is provided. An electrolytic solution is impregnated in a separator. The electrolytic solution contains 4-fluoro-1,3-dioxolane-2-one. Fluorine ion content in the electrolytic solution is preferably from 10 weight ppm to 3200 weight ppm. Thereby, chemical stability of the electrolytic solution is improved, and cycle characteristics are improved. The present invention is effective for the case using an anode active material containing Sn or Si as an element for an anode.