Abstract: A negative electrode active material for a lithium ion battery, the negative electrode active material comprising a carbon material and a carbon film covering the carbon material, wherein the carbon material comprises carbon and boron, the content of boron in the carbon material is 0.2 atomic % or more and less than 3.5 atomic %, the negative electrode active material has an R value of 0.35 or more and 0.85 or less, and the R value is a ratio of a D band to a G band in a Raman spectrum of the negative electrode active material.

Abstract: A method of producing a lithium ion secondary battery includes preparing an electrode body which includes a positive electrode and a negative electrode and in which the negative electrode contains a negative electrode material containing a porous graphite particle having open pores and SiO2 disposed in the open pores, producing a battery assembly including the electrode body and a non-aqueous electrolytic solution containing LiPF6 with a concentration of 1 mol/L or more, and generating lithium difluorophosphate in the electrode body

Abstract: A negative electrode for a lithium-ion secondary battery, wherein the negative electrode includes a negative electrode current collector and a negative electrode layer, and the negative electrode layer includes a negative electrode active material and a binder, wherein an elastic modulus of the binder is larger than a 811 MPa, and an X-ray diffraction intensity of a (110) plane of the negative electrode active material is I (110), and an X-ray diffraction intensity of a (004) plane is I (004). The negative electrode is characterized in that an orientation degree I (110)/I (004) of the negative electrode active material obtained by dividing I (110) by I (004) is larger than 0.23.

Abstract: A method of producing a lithium ion secondary battery disclosed here, includes a process of preparing an electrode body which includes a positive electrode and a negative electrode and in which the negative electrode contains a negative electrode material containing graphite having open pores and SiO2 disposed in the open pores; a process of producing a battery assembly including the electrode body and a non-aqueous electrolytic solution containing LiPF6 with a concentration of 1 mol/L or more; a process of initially charging the battery assembly; and a process of performing an aging treatment on the initially charged battery assembly in an environment of a temperature of 50° C. or higher.

Abstract: A lithium ion secondary battery includes at least a positive electrode, a negative electrode, and an electrolyte solution. The negative electrode includes a negative electrode current collector and a negative electrode mixture layer. The negative electrode mixture layer is formed on a surface of the negative electrode current collector. The negative electrode mixture layer includes graphite particles, inorganic filler particles, lithium titanate particles, and a water-based binder. The inorganic filler particles have an average primary particle size that is ½ or less of an average primary particle size of the graphite particles. The lithium titanate particles have an average primary particle size of 1 ?m or less. A ratio of an average primary particle size of the lithium titanate particles with respect to an average primary particle size of the inorganic filler particles is one or less.

Abstract: Provided is a nonaqueous electrolyte secondary battery in which a nonaqueous electrolyte solution contains lithium bis(oxalato)borate, and in which initial resistance is reduced and resistance to metallic Li precipitation is high. The nonaqueous electrolyte secondary battery disclosed herein includes an electrode body having a positive electrode, a negative electrode, and a separator; and a nonaqueous electrolyte solution. The negative electrode has a negative electrode active material layer. The nonaqueous electrolyte solution contains lithium bis(oxalato)borate. The Na content in the negative electrode active material layer, determined by laser ablation ICP mass spectrometry, is 311 ?g/g or lower.

Abstract: A coated graphite type negative electrode active material is provided which can reduce the low temperature resistance of a secondary battery. The coated graphite type negative electrode active material herein disclosed includes graphite, an amorphous carbon layer coating the graphite, and an intermediate layer situated between the graphite and the amorphous carbon layer. The intermediate layer is a carbon layer doped with boron. The amorphous carbon layer substantially does not include boron.

Abstract: Provided is a graphite-based negative electrode active material that can impart both high output characteristics and high cycle characteristics to a nonaqueous electrolyte secondary battery. The graphite-based negative electrode active material disclosed herein is made up of particles having, in a cross-sectional view, a flat central portion made up of graphite, and a porous accumulation portion made up of accumulated graphite, on both sides of the flat central portion. The graphite that makes up the flat central portion is present more densely than the graphite that makes up the porous accumulation portion.

Abstract: The present disclosure provides a negative electrode active material that can realize excellent low temperature characteristics. An negative electrode active material for a lithium ion secondary battery disclosed herein includes a carbon material that is able to reversibly occlude and release lithium ions and a carbon coating layer that is formed on a surface of the carbon material, and the carbon coating layer contains carbon atoms and phosphorus atoms. In addition, in the carbon coating layer, when a peak of a P2p spectrum measured through X-ray photoelectron spectroscopy (XPS) is subjected to waveform separation, it has a peak at a position at which the binding energy is 131 eV.

Abstract: The present disclosure provides a negative electrode active material that can realize excellent low temperature characteristics. The negative electrode active material for a lithium ion secondary battery disclosed herein includes a carbon material that is able to reversibly occlude and release lithium ions and a carbon coating layer that is formed on a surface of the carbon material, and the carbon coating layer contains carbon atoms and phosphorus atoms. In addition, in the carbon coating layer, when a peak of a P2p spectrum measured by X-ray photoelectron spectroscopy (XPS) is subjected to waveform separation, there is a peak at a position at which a binding energy is 131 eV, and an intensity ratio (ID/IG) of a peak intensity IG at 1,580 cm?1 to a peak intensity ID at 1,360 cm?1 in a Raman spectrum is 0.4 or more and 0.7 or less.

Abstract: A negative electrode which includes graphite particles and which is capable of imparting superior input resistance characteristics to a nonaqueous lithium-ion secondary battery is provided. The negative electrode of a nonaqueous lithium-ion secondary battery disclosed herein includes graphite particles as negative electrode active materials and a supported material being supported by the graphite particles. The graphite particles have phenolic hydroxy groups. The supported material has surface hydroxy groups. A ratio of an amount B (mmol/g) of the surface hydroxy groups in the supported material to an amount A (mmol/g) of the phenolic hydroxy groups in the graphite particles is 30 or more and 150 or less.

Abstract: A nonaqueous electrolyte secondary battery includes a flat wound electrode body that includes a positive electrode sheet, a negative electrode sheet, and a separator sheet, and a nonaqueous electrolyte. The wound electrode body includes a filling layer containing a thermal polymerization product of a resin having electrolyte solution swellability between the negative electrode sheet and the separator sheet.

Abstract: A negative electrode material includes at least a graphite particle and a first metal oxide. The graphite particle includes at least one open pore. The graphite particle has a porosity not lower than 13% and not higher than 66%. The first metal oxide adheres to an inner wall of the open pore. The first metal oxide is lithium ion conductive and electron conductive. The first metal oxide is not smaller than 0.5 part by mass and not greater than 20 parts by mass with respect to 100 parts by mass of graphite particle.

Abstract: A lithium ion secondary battery includes at least a positive electrode, a negative electrode, and an electrolyte solution. The negative electrode includes a negative electrode current collector and a negative electrode mixture layer. The negative electrode mixture layer is formed on a surface of the negative electrode current collector. The negative electrode mixture layer includes graphite particles, inorganic filler particles, lithium titanate particles, and a water-based binder. The inorganic filler particles have an average primary particle size that is ½ or less of an average primary particle size of the graphite particles. The lithium titanate particles have an average primary particle size of 1 ?m or less. A ratio of an average primary particle size of the lithium titanate particles with respect to an average primary particle size of the inorganic filler particles is one or less.

Abstract: A lithium ion secondary battery includes at least a positive electrode, a negative electrode, and an electrolyte solution. The negative electrode includes a negative electrode current collector and a negative electrode mixture layer. The negative electrode mixture layer is formed on a surface of the negative electrode current collector. The negative electrode mixture layer includes graphite particles, inorganic filler particles, lithium titanate particles, and a water-based binder. The inorganic filler particles have an average primary particle size that is ½ or less of an average primary particle size of the graphite particles. The lithium titanate particles have an average primary particle size of 1 ?m or less. A ratio of an average primary particle size of the lithium titanate particles with respect to an average primary particle size of the inorganic filler particles is one or less.

Abstract: A manufacturing method of a negative electrode of a lithium-ion secondary battery, includes: preparing a negative electrode paste containing a negative electrode active material and a binder; and producing the negative electrode using the negative electrode paste. A ratio of a zeta potential of the binder to a zeta potential of the negative electrode active material is 3.5 or more and 9.0 or less.

Abstract: A method of producing a lithium ion secondary battery disclosed here, includes a process of preparing an electrode body which includes a positive electrode and a negative electrode and in which the negative electrode contains a negative electrode material containing graphite having open pores and SiO2 disposed in the open pores; a process of producing a battery assembly including the electrode body and a non-aqueous electrolytic solution containing LiPF6 with a concentration of 1 mol/L or more; a process of initially charging the battery assembly; and a process of performing an aging treatment on the initially charged battery assembly in an environment of a temperature of 50° C. or higher.

Abstract: A method for manufacturing a non-aqueous electrolytic power storage device includes preparing a mixture paste in which an active material particle, a binder, and carboxymethylcellulose are mixed in an aqueous solvent, applying the mixture paste to a current collector, and drying the applied mixture paste. Here, a proportion of carboxymethylcellulose having an etherification degree of 40 mol/C6 or less is 0.5 wt % or more in terms of a solid content fraction in the mixture paste.

Abstract: According to the present invention, there is provided a negative electrode material for a lithium secondary battery, including a negative electrode active material including a carbon material and having an ID/IG ratio of XPS of 0.2 to 0.74, and a coating portion disposed on a surface of the negative electrode active material. The coating portion has a boron atom and a crosslinking site having a bonding portion of C—O—C and interposed between the boron atom and the negative electrode active material. In an XPS spectrum, when an area of the peak of the 1s electron orbital of the boron atom is denoted by Ab and an area of the peak of the C—O—C bonding portion is denoted by Ac, the ratio Ac/Ab of the peak area Ac to the peak area Ab is 0.11 or more and 0.51 or less.

Abstract: A negative electrode which includes graphite particles and which is capable of imparting superior input resistance characteristics to a nonaqueous lithium-ion secondary battery is provided. The negative electrode of a nonaqueous lithium-ion secondary battery disclosed herein includes graphite particles as negative electrode active materials and a supported material being supported by the graphite particles. The graphite particles have phenolic hydroxy groups. The supported material has surface hydroxy groups. A ratio of an amount B (mmol/g) of the surface hydroxy groups in the supported material to an amount A (mmol/g) of the phenolic hydroxy groups in the graphite particles is 30 or more and 150 or less.