Abstract: A positive electrode for lithium-ion secondary battery is provided, the positive electrode being able to endure high-temperature and high-voltage driving modes or operations. At least parts of the surface of positive-electrode active-material particles are covered by a polymer coating layer, and an amino group and phosphoric-acid group are included in the polymer coating layer. Since the polymer coating layer includes a phosphoric-acid-based polymer, capacity declines are inhibited at the time of cycle tests.

Abstract: A positive electrode for lithium-ion secondary battery is provided, the positive electrode being able to endure high-temperature and high-voltage driving modes or operations. At least parts of the surface of positive-electrode active-material particles are covered by a polymer coating layer, and an amino group and phosphoric-acid group are included in the polymer coating layer. Since the polymer coating layer includes a phosphoric-acid-based polymer, capacity declines are inhibited at the time of cycle tests.

Abstract: The present invention provides a polyester film suitable as a base film in a release film which is capable of realizing a high inspection accuracy when a polarizing plate laminated with the release film is subjected to visual inspection using a Cross-Nicol method for detecting defects such as distortion and unevenness or inclusion of foreign matters therein. The polyester film for a release film for a polarizing plate according to the present invention has a haze of 7 to 18% and an L value of not more than 77 as measured by a reflection method.

Abstract: Provided in the present invention is a polyester film useful for making the release films, which contains the particles having an average particle size in the range of 0.2 to 1.5 ?m and a particle size distribution factor (d25/d75) in the range of 1.0 to 2.0. Preferably, the amount of oligomer on the film surface after having been coated with methyl ethyl ketone, dried and heat treated at 180° C. for 10 minutes is 5.0 mg/m2 or less. The polyester film of the present invention excels in optical properties which are one of the important characteristics of the films to be used for liquid crystal displays or such, and is capable of providing high-degree precision in detection of faults in film inspection. Specifically, the film of the present invention is capable of realizing high-degree precision and easy detection of faults in the inspections of the films by the Cross Nicol method which is one of the vital inspection techniques in the production process of polarizing plates.

Abstract: The present invention relates to a release polyester film, a release polyester film for protecting a liquid crystal display panel, a polyester film for a protective film and a polyester film for an optical film which each include a polyester layer containing a titanium compound and a phosphorus compound in amounts satisfying the following formulae (1) and (2) at the same time; as well as a polyester film for a release film which includes a polyester layer containing a titanium compound and a phosphorus compound in amounts satisfying the following formulae (1) and (2) at the same time in which a change in an orientation angle in the film is not more than 3°/500 mm, 0<WTi?20??(1) 1?WP?300??(2) wherein WTi represents a content (ppm) of a titanium element in the polyester layer; and WP represents a content (ppm) of a phosphorus element in the polyester layer.