Sony Corporation

Hisashi Tsujimoto

Atsuo Omaru

Masayuki Nagamine

Yoshiaki Obana

Yuzuru Fukushima

Yoshikatsu Yamamoto

Masaki Kuratsuka

Hiroaki Tanizaki

Junji Kuyama

Yuta Kobayashi

Atsushi Kajita

Yukako Teshima

Tadashi Matsushita

Takashi Ono

Kenichi Ogawa

Toshikazu Nakamura

A cylindrical nonaqueous electrolyte secondary battery includes: a wound electrode unit as a wound electrode laminate of belt-like positive and negative electrodes laminated via a separator, the positive electrode including a positive electrode collector and a positive electrode active material layer, and the negative electrode including a negative electrode collector and a negative electrode active material layer; an adhesive member provided to cover the wound electrode laminate at a terminating end portion lying on an outer side of the wound electrode unit; and a battery canister housing the wound electrode unit, the adhesive member including a base material, and an adhesive layer provided on a whole surface or on at least a part of the surface on one side of the base material, and the base material being a mixture of a resin material of high swellability and a resin material of high melting point.

Cylindrical nonaqueous electrolyte battery

A heat-resistant insulating layer-provided separator includes a polyolefin layer and a heat-resistant insulating layer formed on one or both surfaces of the polyolefin layer and containing a heat-resistant resin and an oxidation-resistant ceramic particle. The heat-resistant insulating layer contains the oxidation-resistant ceramic particle in a proportion of from 60 to 90%.

Heat-resistant insulating layer-provided separator containing heat-resistant resin and oxidation-resistant ceramic particles and non-aqueous electrolyte secondary battery

A negative electrode for a nonaqueous electrolyte secondary cell, includes: a negative electrode active material layer containing a negative electrode active material, a polyvinylidene fluoride component including polyvinylidene fluoride and/or a derivative having polyvinylidene fluoride as a main chain, a styrene-butadiene component including a styrene-butadiene polymer and/or a derivative having a styrene-butadiene polymer as a main chain, a nonionic surfactant having an HLB of 10 to 15, and N-methylpyrrolidone; and a foil-shaped negative electrode current collector provided with the negative electrode active material layer on at least one principal surface of the collector.

Negative electrode for nonaqueous electrolyte secondary cell, method of manufacturing the same, and nonaqueous electrolyte secondary cell

An anode includes an anode double side coating section; a first anode single-side coating section; and an anode double side non-coating section, the anode double side non-coating section, the first anode single-side coating section, and the anode double side coating section are provided in this order from a first end on the side of spiral winding start of the anode, and in an anode, ('Area density of an anode mixture layer on the first main surface side of the first anode single-side coating section')/('Area density of the anode mixture layer on the first main surface side of sections other than the first anode single-side coating section') is equal to or more than about 1.2.

Battery, battery pack, electronic apparatus, electric vehicle, electric power storage apparatus, and electric power system

Disclosed is a non-aqueous electrolyte secondary battery having an excellent preservation characteristic at a high temperature and charging/discharging cycle characteristic. A rolled body in which a strip-shape positive electrode and negative electrode are rolled with a separator in-between is provided inside a battery can. The positive electrode contains LiMnMaO(where, Ma is at least one element selected from the group consisting of metal elements other than Mn, and B) and LiNiMbO(where, Mb is at least one element selected from the group consisting of metal elements other than Ni, and B). By replacing part of Mn and Ni with other elements, the crystal structure can be stabilized. Thereby, the capacity retention ratio after preservation at a high temperature, and a heavy load discharging power under a high electric potential cutoff can be improved. The mean particle size of particles of the above-mentioned oxides are preferable to be 30 &#x3bc;m and below so that an excellent charging/discharging cycle characteristic can be obtained.

Material for positive electrode and secondary battery

Growing community of inventors

Fukushima, Japan

Hisashi Tsujimoto