Sony Corporation

Murata Manufacturing Co., Ltd.

Yazaki Corporation

Murata Manufacturingco., Ltd.

Sony Corpotation

Sony Corportion

Kenichi Kawase

Takakazu Hirose

Isamu Konishiike

Masayuki Iwama

Tomoo Takada

Yukio Miyaki

Takashi Fujinaga

Hideki Nakai

Shunsuke Kurasawa

Takayuki Fujii

Koichi Matsumoto

Momoe Adachi

Nozomu Morita

Tadahiko Kubota

Hiroyuki Yamaguchi

Rikako Imoto

Kensuke Yamamoto

Kazunori Noguchi

Akira Takamuku

Isao Koizumi

Masayuki Ihara

Yoshikazu Kato

Toshio Nishi

Masaharu Senoue

Yukiko Iijima

Hiroshi Horiuchi

Atsumichi Kawashima

Masanori Soma

Yosuke Hosoya

Shinji Tanaka

Guohua Li

Kotaro Satori

Kazuaki Endoh

Akinori Kita

Motoki Endo

Shigeru Fujita

Katsuhiko Naoi

Mashio Shibuya

Mitsuhiro Mori

Yoshinori Inoue

Atsuhiro Abe

Norihiro Shimoi

Fumiko Hara

Yusuke Fujishige

Kazumi Izumitani

Hidetoshi Nishiyama

Chisato Okina

Keisuke Tanabe

Isamu Konishiikee

Michiko Komiyama

Yasushi Oura

There is provided a nonaqueous electrolyte battery including a first electrode having a strip shape, a second electrode having a strip shape, a first electrode lead, a second electrode lead, a separator having a strip shape that is disposed between the first electrode and the second electrode, and a nonaqueous electrolyte. A laminated electrode body, which is obtained by laminating the first electrode and the second electrode through the separator in such a manner that the second electrode lead is disposed at the other end portion of the second electrode not opposite to one end portion of the first electrode to which the first electrode lead is connected, is wound in a longitudinal direction with one end to which the first electrode lead is connected made as an initial end, and a wound electrode body is obtained.

Nonaqueous electrolyte battery

A secondary battery capable of improving the cycle characteristics and the initial charge and discharge characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. The anode has an anode active material layer on an anode current collector. The anode active material layer contains a crystalline anode active material having silicon as an element, and is linked to the anode current collector.

Method for forming anode having silicon active material linked to current collector

A battery capable of improving the cycle characteristics is provided. The battery includes a cathode, an anode, and an electrolytic solution. The anode includes an anode active material layer containing an anode active material having silicon as an element, and a coating layer that coats the anode active material layer, and contains an oxide of a 3d transition metal element at least one selected from the group consisting of iron, cobalt, and nickel.

Anode and battery

A secondary battery having a cathode, an anode, and an electrolyte is provided. The cathode includes a cathode active material containing at least one kind selected from the group consisting of sulfur S and phosphorus P in a portion near the particle surface of a lithium composite oxide. A content of the kind in the portion is larger than that in the particle of the lithium composite oxide.

Cathode active material, its manufacturing method, cathode, its manufacturing method, and secondary battery

A battery including an anode with an anode active material layer that includes anode active material particles made of an anode active material including at least one of silicon and tin as an element. An oxide-containing film including an oxide of at least one kind selected from the group consisting of silicon, germanium and tin is formed in a region of the surface of each anode active material particle in contact with an electrolytic solution by a liquid-phase method such as a liquid-phase deposition method. The region in contact with the electrolytic solution of the surface of each anode active material particle is covered with the oxide-containing film. The thickness of the oxide-containing film is preferably within a range from 0.1 nm to 500 nm both inclusive.

Battery with anode active material with oxide coating on active particles

A lithium ion secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode contains a lithium composite oxide. The negative electrode contains a material including at least one of silicon Si and tin Sn as a constituent element. The lithium composite oxide includes lithium Li having a composition ratio a, a first element having a composition ratio b, and a second element having a composition ratio c as a constituent element. The first element including two kinds or more selected from among manganese Mn, nickel Ni, and cobalt Co, and including at least manganese. The second element including at least one kind selected from among aluminum Al, titanium Ti, magnesium Mg, and boron B. The composition ratios a to c satisfy the relationships of 1.1&#x3c;a&#x3c;1.3, 0.7&#x3c;b+c&#x3c;1.1, 0&#x3c;c&#x3c;0.1, and a&#x3e;b+c.

Lithium ion secondary battery, electric tool, electric vehicle, and power storage system

A battery is provided including a positive electrode; a negative electrode including a first negative electrode active material; and an electrolytic solution, wherein the first negative electrode active material includes a core portion having a core portion surface, wherein the core portion has a median diameter of 0.3 &#x3bc;m to 20 &#x3bc;m, and a covering portion that covers at least part of the core portion surface, wherein the covering portion comprises at least Si, O and at least of one element M1 selected from Li, carbon (C), Mg, Al, Ca, Ti, Cr, Mn, Fe, Co, Ni, Cu, Ge, Zr, Mo, Ag, Sn, Ba, W, Ta, Na, and K.

Battery, negative electrode active material, and electric tool

Anode active materials, anodes, and batteries are provided. In one embodiment, an anode active material includes particles consisting essentially of a material selected from the group consisting of silicon and an alloy of silicon. An average degree of circularity of the particles is 90% or less.

Anode active material and battery

A secondary battery capable of improving cycle characteristics is provided. An anode includes: an anode active material layer on an anode current collector, the anode active material layer including a plurality of anode active material particles, in which the average particle area of the plurality of anode active material particles observed from a surface of the anode active material layer is within a range of 1 &#x3bc;mto 60 &#x3bc;mboth inclusive.

Anode and secondary battery

A lithium secondary battery includes a positive electrode, a negative electrode, and an electrolyte solution. The positive electrode contains a positive electrode active material including element M2 incorporated in a crystal structure in a surface layer area of a complex oxide, the oxide including the element M1 and being represented by the following formula (1), M2 being different from M1. The element M2 is at least one kind selected from the group consisting of magnesium Mg, calcium Ca, titanium Ti, zirconium Zr, sulfur S, fluorine F, iron Fe, copper Cu, boron B, aluminum Al, phosphorus P, carbon C, manganese Mn, nickel Ni, and cobalt Co.Li(MnCoNi)M1O&#x2003;&#x2003;(1) M1 is at least one kind of aluminum, magnesium, zirconium, titanium, barium Ba, boron, silicon Si, and iron, a satisfies 0&#x3c;a&#x3c;0.25, b satisfies 0.5&#x2266;b&#x3c;0.7, c satisfies 0&#x2266;c&#x3c;1&#x2212;b, d satisfies 0.01&#x2266;d&#x2266;0.2, and e satisfies 0&#x2266;e&#x2266;1.

Lithium secondary battery, positive electrode active material, positive electrode, electric tool, electric vehicle, and power storage system

An anode capable of preventing expansion of an anode active material layer and a battery using it are provided. The anode includes an anode current collector, and an anode active material layer containing silicon (Si) as an element, wherein the anode active material layer therein contains at least one selected from the group consisting of a fluoride of an alkali metal and a fluoride of an alkali earth metal.

A secondary battery capable of obtaining superior cycle characteristics and superior swollenness characteristics is provided. The secondary battery includes a cathode and an anode capable of inserting and extracting an electrode reactant; and an electrolyte containing a solvent and an electrolyte salt. The anode has an anode active material layer on an anode current collector. The anode active material layer contains a plurality of crystalline anode active material particles having silicon (Si) as an element. The plurality of anode active material particles contain a spherical particle and a nonspherical particle.

Secondary battery and anode

A battery including a cathode, an anode, and an electrolytic solution. The electrolytic solution is impregnated in a separator provided between the cathode and the anode. The anode has an insulative coat on an anode active material layer provided on an anode current collector. The coat contains an insulating material such as a meal hydroxide and a metal oxide. The coat is in a form of plate divided into a plurality of portions. The insulation property of the coat prevents internal short circuit. A plurality of portions of the coat prevent separation of the anode active material layer and decomposition of the electrolytic solution. Further, even when short circuit occurs, heat generation is prevented by heat absorption characteristics of the coat.

Growing community of inventors

Fukushima, Japan

Kenichi Kawase