Canon Kabushiki Kaisha

Other

Asao, Masaya

Soichiro Kawakami

Naoya Kobayashi

Masaya Asao

Tomoya Yamamoto

Shinya Mishina

Takao Ogura

Masahiro Kanai

Katsumi Nakagawa

Katsunori Hatanaka

Hideyuki Suzuki

Tatsuyuki Aoike

Tetsuya Kaneko

Yasuhiro Yamada

Masaki Fukaya

Katsuhiko Inoue

Koichi Matsuda

Ihachiro Gofuku

Satoshi Itabashi

Katsunori Terada

Nobuyuki Suzuki

Atsushi Tani

Toshihiro Saika

Yoshinori Isobe

Hidetoshi Tsuzuki

Yasusaburo Degura

Nobuko Kitahara

Hitomi Sano

Takeshi Kosuzu

Tsutomu Murakami

Kazunari Hagiwara

Takayoshi Arai

Toshifumi Akasaka

Keishi Saito

Toshimitsu Kariya

Jinsho Matsuyama

Akira Morita

Toshiaki Aiba

Naoto Okada

Rie Ueno

Nobuyuki Ishikawa

Hironao Kimura

Yuzo Kouda

Toshiyuki Komatsu

Akio Kashiwazaki

Masashi Hirose

Kimitoshi Fukae

Yasuaki Murai

Ichiro Kataoka

Masahiro Mori

Kazuyuki Sato

Shigenori Itoyama

Kei Inoue

Ryuji Murayama

Masatoshi Watanabe

Takeshi Aoki

Takashi Noma

Mikio Shimada

Norishige Kakegawa

Teruhiko Furushima

Naoya Kawamura

Hiroya Umeyama

Kaoru Ojima

Naoya Kabayashi

Provided is an anode active material for energy storage devices capable of electrochemically inserting and extracting lithium ions and production method thereof, an electrode structure including the active material and flake graphite, and an energy storage device using the electrode structure as an anode. The anode active material includes secondary particles that are aggregates of 10-300 nm primary particles containing silicon as a main component. The primary particles each include, as a surface layer, a composite metal oxide layer containing at least one or more metal elements selected from at least Al, Zr, Mg, Ca, and La and Li.

Negative electrode material for power storage device, electrode structure, power storage device, and production method for each

To provide a polymeric compound having superior charge-providing properties, the polymeric compound contains at least one unit represented by the following general formula (5).  In the general formula (5), Rrepresents a hydrogen atom or an alkyl group; Rto Reach represent a hydrogen atom, an alkyl group, an alkoxy group, a hydroxyl group or a halogen atom, or Rand Rmay combine each other to form a ring; and A represents a divalent linking group.

Polymerizable monomer, polymeric compound, charge control agent containing the polymeric compound, and developer bearing member and toner which contain the charge control agent

A method of producing a material capable of electrochemically storing and releasing a large amount of lithium ions is provided. The material is used as an electrode material for a negative electrode, and includes silicon or tin primary particles composed of crystal particles each having a specific diameter and an amorphous surface layer formed of at least a metal oxide, having a specific thickness. Gibbs free energy when the metal oxide is produced by oxidation of a metal is smaller than Gibbs free energy when silicon or tin is oxidized, and the metal oxide has higher thermodynamic stability than silicon oxide or tin oxide. The method of producing the electrode material includes reacting silicon or tin with a metal oxide, reacting a silicon oxide or a tin oxide with a metal, or reacting a silicon compound or a tin compound with a metal compound to react with each other.

Method of producing lithium ion-storing/releasing material, lithium ion-storing/releasing material, and electrode structure and energy storage device using the material

A powder material which can electrochemically store and release lithium ions rapidly in a large amount is provided. In addition, an electrode structure for an energy storage device which can provide a high energy density and a high power density and has a long life, and an energy storage device using the electrode structure are provided. In a powder material which can electrochemically store and release lithium ions, the surface of particles of one of silicon metal and tin metal and an alloy of any thereof is coated by an oxide including a transition metal element selected from the group consisting of W, Ti, Mo, Nb, and V as a main component. The electrode structure includes the powder material. The battery device includes a negative electrode having the electrode structure, a lithium ion conductor, and a positive electrode, and utilizes an oxidation reaction of lithium and a reduction reaction of lithium ion.

Powder material, electrode structure using the powder material, and energy storage device having the electrode structure

There is provided a lithium secondary battery having a high capacity and excellent high-rate discharge characteristic and charge/discharge cycle characteristic. The lithium secondary battery comprises a negative electrode, a positive electrode and an ionic conductor, wherein the positive electrode comprises lithium metal composite oxide particles; the lithium metal composite oxide particles comprise a plurality of secondary particles in an elongated shape each comprised of a plurality of primary particles with an average particle size of 0.1 to 1 &#x3bc;m so aggregated as to form a void therebetween; and the secondary particle is columnar or planar and has an average size in a long length direction of 5 to 15 &#x3bc;m.

Lithium metal composite oxide particles, process of producing lithium metal composite oxide particles, electrode structure containing lithium metal composite oxide particles, process of producing electrode structure, and lithium secondary battery having electrode structure

An electrode material for a rechargeable lithium battery, characterized in that said electrode material comprises a fine powder of a silicon-based material whose principal component is silicon element, said fine powder having an average particle size (R) in a range of 0.1 &#x3bc;m&#x2266;R&#x3c;0.5 &#x3bc;m. An electrode structural body for a rechargeable lithium battery, having an electrode material layer comprising said silicon-based material fine powder. A rechargeable lithium battery whose anode comprising said electrode structural body.

Electrode material for rechargeable lithium battery, electrode structural body comprising said electrode material, rechargeable lithium battery having said electrode structural body, process for the production of said electrode structural body, and process for the production of said rechargeable lithium battery

An electrode structure for a lithium secondary battery including: a main active material layer including a metal powder selected from silicon, tin and an alloy thereof that can store and discharge lithium by electrochemical reaction, and a binder of an organic polymer; and a current collector. The main active material layer includes a powder of a support material for supporting the electron conduction of the main active material layer in addition to the metal powder and the powder of the support material are particles having a spherical, pseudo-spherical or pillar shape with an average particle size of 0.3 to 1.35 times the thickness of the main active material layer. The support material is one or more selected from graphite, oxides of transition metals and metals that do not electrochemically form alloy with lithium. Organic polymer compounded with a conductive polymer is used for the binder.

Electrode structure for lithium secondary battery and secondary battery having such electrode structure

Process of producing lithium metal composite oxide particles

An electrode material for a lithium secondary battery which includes particles each having a central portion and a surface portion covering the surface of the central portion. The central portion occupies 80 to 99% of a distance from a center to an outermost surface of the particle and the surface portion occupies 20 to 1% of the distance. The central portion includes LiMDO(M represents Co or Ni, D represents a transition metal element or Al replacing a part of Co or Ni as M, and M is not the same as D) having an &#x3b1;-NaFeOstructure. The surface portion includes LiMEO(M represents Co or Ni, E represents a metal element replacing a part of Co or Ni as M, and M is not the same as E) having an &#x3b1;-NaFeOstructure. The content of element E in the central portion satisfies the relation of E/(M+D+E)&#x3c;0.05 in terms of an atomic ratio, and the content of element D in the surface portion satisfies the relation of D/(M+D+E)&#x3c;0.05 in terms of an atomic ratio.

Method of judging the propriety of a positive electrode active material

An electrode material for a lithium secondary battery which includes particles each having a central portion and a surface portion covering the surface of the central portion. A distance from a center to an outermost surface of the particle is occupied 80 to 99% by the central portion and 1 to 20% by the surface portion. The central portion includes LiMDOhaving an &#x3b1;-NaFeOstructure, and the surface portion includes LiMEOhaving an &#x3b1;-NaFeOstructure. (M is C or Ni; D is a transition metal element or Al replacing a part of Co or Ni as M; E is a metal element replacing a part of Co or Ni as M; and M is not the same as D or E.) The following relationships are satisfied in the central portion, in terms of atomic ratio: D/(M+D+E)&#x3c;0.05 and E/(M+D+E)&#x3c;0.05.

Electrode material for lithium secondary battery including particles having central portion and surface portion, electrode structure and lithium secondary battery

There is provided a lithium secondary battery with a negative electrode which comprises a negative electrode active material layer comprising alloy particles comprising silicon and tin and having an average particle diameter of 0.05 to 2 &#x3bc;m as an active material, and a negative electrode current collector, wherein the negative electrode active material layer has a storage capacity of 1,000 to 2,200 mAh/g and a density of 0.9 to 1.5 g/cmand which thereby has a high capacity and a good cycle-characteristic. Thus, a lithium secondary battery having a high capacity and a long life and so designed as to exhibit these characteristics at the same time is provided.

Lithium secondary battery

An electrode material for an anode of a rechargeable lithium battery, containing a particulate comprising an amorphous Sn.A.X alloy with a substantially non-stoichiometric ratio composition. For said formula Sn.A.X , A indicates at least one kind of an element selected from a group consisting of transition metal elements, X indicates at least one kind of an element selected from a group consisting of O, F, N, Mg, Ba, Sr, Ca, La, Ce, Si, Ge, C, P, B, Pb, Bi, Sb, Al, Ga, In, Tl, Zn, Be, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, As, Se, Te, Li and S, where the element X is not always necessary to be contained. The content of the constituent element Sn of the amorphous Sn.A.X alloy is Sn/(Sn+A+X)=20 to 80 atomic %. An electrode structural body for a rechargeable lithium battery, comprising said electrode material for an anode and a collector comprising a material incapable of being alloyed with lithium in electrochemical reaction, and a rechargeable lithium battery having an anode comprising said electrode structural body.

Electrode material for anode of rechargeable lithium battery, electrode structural body using said electrode material, rechargeable lithium battery using said electrode structural body, process for producing said electrode structural body, and process for producing said rechargeable lithium battery

Lithium metal composite oxide particles having particles with columnar or planar shape

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Nara, Japan

Soichiro Kawakami