Abstract: The positive active material is a positive active material for a lithium secondary battery, including a lithium transition metal compound that has an olivine crystal structure and contains at least Ni, Fe, and Mn as transition metal elements, wherein when the sum of mole atoms of Ni, Fe, and Mn of transition metal elements contained in the lithium transition metal compound is expressed as 1, and the mole atomic ratios of Ni, Fe, and Mn are represented by a, b, and c (a+b+c=1, a>0, b>0, c>0), respectively, the following is satisfied: 0.85?c?0.92 and 0.3?a/(a+b)?0.9.

Abstract: The present invention provides a non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode having a negative active material, and a non-aqueous electrolyte; characterized in that the negative active material contains composite particle (C), which has silicon-containing particle (A) and electronic conductive additive (B), and carbon material (D), wherein the weight of the electronic conductive additive (B) falls within the range of 0.5 wt. % to 60 wt. % to the weight of the composite particle (C). The negative active material contains silicon which is capable of performing high discharge capacity, so that a non-aqueous electrolyte secondary battery having a large discharge capacity can be obtained.

Abstract: The present invention provides a non-aqueous electrolyte secondary battery comprising a positive electrode, a negative electrode having a negative active material, and a non-aqueous electrolyte; characterized in that said negative active material contains composite particle (C), which has silicon-containing particle (A) and electronic conductive additive (B), and carbon material (D), wherein the weight of said electronic conductive additive (B) falls within the range of 0.5 wt. % to 60 wt. % to the weight of said composite particle (C). The negative active material contains silicon which is capable of performing high discharge capacity, so that a non-aqueous electrolyte secondary battery having a large discharge capacity can be obtained.

Abstract: It is an object of the present invention to provide a positive electrode material having a large ratio of the discharge capacity around 4 V to the total discharge capacity including the discharge capacity at 4V or lower while making the discharge capacity around 4 V sufficient, for the purpose of providing a lithium secondary battery using a lithium transition metal phosphate compound excellent in thermal stability, utilizing the discharge potential around 4V (vs. Li/Li+) that is higher than the discharge potential of LiFePO4, and being advantageous with respect to the detection of the end of discharge state, and a lithium secondary battery using the same. The present invention uses a positive active material for a lithium secondary battery containing a lithium transition metal phosphate compound represented by LiMn1-x-yFexCoyPO4 (0.1?x?0.2, 0<y?0.2).

Abstract: The invention provides a polyanion-based positive active material which can improve storage stability (especially, high temperature storage stability), charge and discharge cycle performance and the like of a lithium secondary battery, and a lithium secondary battery using the same. The positive active material for a lithium ion secondary battery contains lithium iron cobalt phosphate represented by the general formula: LiyFe(1-x)CoxPO4 (0<x?0.019, 0?y?1.2). By using the positive active material for a lithium secondary battery, high temperature storage stability and charge and discharge cycle performance can be improved in comparison with a case where LiyFePO4 containing no Co is used. By using the positive active material, a lithium ion secondary battery can be suitable for applications in fields of electric automobiles and industrial batteries in which long lives, high capacities, and high output powers are required.

Abstract: An object is to provide a positive electrode material capable of increasing a discharge capacity of a nonaqueous electrolyte secondary battery, a production method thereof, and the like.

Abstract: The present invention provides a non-aqueous electrolyte secondary battery comprising a positive electrode, a negative electrode having a negative active material, and a non-aqueous electrolyte; characterized in that said negative active material contains composite particle (C), which has silicon-containing particle (A) and electronic conductive additive (B), and carbon material (D), wherein the weight of said electronic conductive additive (B) falls within the range of 0.5 wt. % to 60 wt. % to the weight of said composite particle (C). The negative active material contains silicon which is capable of performing high discharge capacity, so that a non-aqueous electrolyte secondary battery having a large discharge capacity can be obtained.

Abstract: The present invention is concerned on the manufacturing process of Li-contained nickel oxyhydroxide obtained by a lithium absorption process with contact reaction between nickel oxyhydroxide and a solution obtained by dissolving metallic Li and polycyclic aromatic compounds in a solvent. Moreover, the nonaqueous electrolyte electrochemical cell using Li-contained nickel oxyhydroxide active material obtained by this manufacturing process is able to be high performance with a low manufacturing price by its simple process compared to the existing process by electrochemical process and so on.

Abstract: One of the present invention is a process for a production of lithium-containing material by a lithium absorption reaction proceeding on contact between material M and a solution obtained by dissolving metallic Li and polycyclic aromatic compound into chain monoether, where the material M contains at least one sort of elements selected from a transition metal, IIIb metal, IVb metal, and Vb metal in a periodic table. One of a present invention is a process for a production of a non-aqueous electrolyte electrochemical cell using an electrode with the lithium-containing material.

Abstract: The non-aqueous electrolyte secondary battery comprising a positive electrode comprising a positive active material capable of absorbing/releasing lithium ion and a negative electrode comprising as a negative active material a graphite comprising boron having a S1/S2 ratio of about 1.0 or less wherein S1 is the area of the peak having its top at a range of from 188 to 192 eV and S2 is the area of the peak having its top at a range of from 185 to 187 eV as measured by X-ray photoelectron spectroscopy (XPS). The content of boron in the graphite is from about 0.008% to about 3% by weight. The boron-containing graphite incorporated as a negative active material contains little boron compound having an extremely low electronic conductivity, and the discharge capacity of the non-aqueous electrolyte secondary battery can be enhanced.

Abstract: The present invention provides a non-aqueous electrolyte secondary battery comprising a positive electrode, a negative electrode comprising a carbonaceous material, an organic electrolyte comprising a lithium salt and a solvent, and a separator. The solvent comprises ethylene carbonate (EC), propylene carbonate (PC), a chain carbonate and phenylethylene carbonate, the content of the chain carbonate, ethylene carbonate (EC) and the propylene carbonate (PC) are from 50 to 90 vol %, from 5 to 45 vol % and from 5 to 45 vol %, respectively, based on the total volume of the ethylene carbonate (EC), the propylene carbonate and the chain carbonate, and the content of the phenylethylene carbonate is from 0.1 to 5.0 wt % based on the total weight of the electrolyte. The non-aqueous electrolyte secondary battery according to the invention exhibits a great discharge capacity, an excellent cycle life performance and an excellent low-temperature discharge performance.