National Institute of Advanced Industrial Science and Technology

Kabushiki Kaisha Toyota Jidoshokki

Agency of Industrial Science and Technology

Gs Yuasa International Ltd.

Kawasaki Jukogyo Kabushiki Kaisha

Sumitomo Electric Industries, Limited

Sumitomo Rubber Industries Limited

Sumitomo Seika Chemicals Co., Ltd.

Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Murata Manufacturing Co., Ltd.

Nippon Electric Glass Co., Ltd.

Japan Vilene Company, Ltd.

Fukuda Metal Foil & Powder Co., Ltd.

Director General Agency of Industrial Science and Technology

Ist Corporation, Limited

Tetsuo Sakai

Takashi Mukai

Toshikatsu Kojima

Tadashi Kakeya

Junichi Niwa

Itsuki Uehara

Akira Kojima

Manabu Kanemoto

Tetsuya Ozaki

Masaharu Watada

Masanori Morishita

Minoru Kuzuhara

Kazuhito Kawasumi

Tsutomu Iwaki

Yuta Ikeuchi

Kazuo Tsutsumi

Kazuya Nishimura

Kazuki Okuno

Hitotoshi Murase

Nobutaka Fujimoto

Naoto Yamashita

Mitsuharu Tabuchi

Tomonari Takeuchi

Tatsuya Kubo

Masahiro Yanagida

Taichi Sakamoto

Kuniaki Tatsumi

Hikari Sakaebe

Koichiro Ikeda

Yuji Kinpara

Masakazu Murase

Masataka Nakanishi

Masahiro Kato

Masatoshi Majima

Keizo Harada

Hiroyuki Kageyama

Kazuo Hochi

Takahiro Higashino

Hideo Yamauchi

Akihiko Sakamoto

Masanao Tanaka

Hiroshi Ishikawa

Hiroshi Yamada

Takuhiro Miyuki

Hiroshi Miyamura

Nobuhiro Kuriyama

Hideaki Tanaka

Tomoaki Takasaki

Junichi Fujishige

Akihiro Yamano

Jinhan Yao

Shuichi Karashima

Makoto Tsukahara

Masaru Yao

Kunio Takahashi

Kunihiko Tani

Kiichiro Yamaguchi

Akihito Isomura

Takahiro Mishima

Jin-Joo Park

Tatsuo Nakamura

Seijiro Ochiai

Masashi Higuchi

Tatsuya Eguchi

Tomohiro Nagakane

Koji Kimura

Hiroshi Senoh

Mitsuharu Muta

Hitoshi Aikiyo

Hiroshi Ohnishi

Yuka Kondo

Te Hyon Cho

Hiroyuki Takeshita

Yuya Sato

Yoshiteru Kawabe

Masateru Nakoji

Abdulkarim Kadir

Atsushi Takagi

Hiroshi Yoshinaga

Masasi Wada

Hideya Yoshitake

Makoto Saito

Yasue Okuyama

Meijing Zou

Aki Nakashima

Kazuaki Hokano

Chujo Fumiya

Kasuo Tsutsumi

Yuusuke Eda

Kazuki Sawa

Yoshihito Nimura

An object of the present disclosure is to provide a secondary battery having excellent cyclability by using a sulfur-based active material as a negative-electrode active material while preventing a reaction between an eluted polysulfide and a positive electrode. The metal-ion secondary battery comprises a negative electrode comprising a sulfur-containing compound as a negative-electrode active material, a positive electrode and an electrolyte, and has a polymer gel layer on a surface of the positive electrode.

Metal-ion secondary battery

Provided is a lithium ion battery whose manufacturing process is simple and which has high energy density and heat resistance. A lithium ion battery capable of storing and releasing lithium ions, and being provided with a separator between a positive electrode and a negative electrode having irreversible capacity at the initial charge/discharge, and having a structure in which void portions in the separator are filled with a nonaqueous electrolytic solution including lithium ions, wherein a positive electrode active material contained in the positive electrode has a first charge-discharge efficiency of 80% to 90% when charged/discharged using metal Li as an counter electrode; a negative electrode active material contained in the negative electrode includes a mixed material of a silicon compound and a carbon material; in the negative electrode, lithium corresponding to an irreversible capacity at the initial charge/discharge is not doped; a capacity ratio of the negative electrode to the positive electrode at the initial electric charge capacity of the positive electrode and the negative electrode is 0.95 or more and 1 or less; the positive electrode binder contained in the positive electrode is an aqueous binder; the negative electrode binder contained in the negative electrode is a polyimide; and the nonaqueous electrolyte contains lithium bis(oxalate) borate.

Lithium ion battery

An object of the present invention is to provide a novel sulfur-based positive-electrode active material which can largely improve cyclability of a lithium-ion secondary battery, a positive electrode comprising the positive-electrode active material and a lithium-ion secondary battery comprising the positive electrode. The sulfur-based positive-electrode active material is one comprising: a carbon skeleton derived from a polymer composed of a monomer unit having at least one hetero atom-containing moiety, and sulfur incorporated into the carbon skeleton as the carbon skeleton is formed from the polymer by heat treatment.

Method for making a sulfur-based positive-electrode active material

A current collector included in a fuel cell, the fuel cell including a membrane electrode assembly including a solid polymer electrolyte layer and a pair of electrode layers formed to sandwich the solid polymer electrolyte layer, the current collector stacked on each electrode layer, and a gas flow path for supply of a gas to each electrode layer, the current collector including a metal porous body which is stacked on the electrode layer, has a flowing gas supplied to the electrode layer, and is rendered conducting to the electrode layer, and the metal porous body including an electrically conductive layer containing electrically conductive particles fixed to a corrosion-resistant and water-repellent resin at least on a side of the electrode layer.

Current collector for fuel cell, and fuel cell

This binder for use in a positive electrode for a lithium ion secondary battery contains a copolymer of both vinyl alcohol and an alkali-metal-neutralized ethylenically unsaturated carboxylic acid.

Binder for use in positive electrode for lithium ion secondary battery, positive electrode for lithium ion secondary battery containing said binder, lithium ion secondary battery using said positive electrode, and electrical machinery and apparatus

A negative electrode mixture for a nonaqueous electrolyte secondary cell according to the present invention includes: a negative electrode active material; a conductive assistant; and a binder. The binder contains a copolymer of vinyl alcohol and an alkali metal-neutralized product of ethylene-unsaturated carboxylic acid.

Negative-electrode mixture for non-aqueous electrolyte secondary cell, negative electrode for non-aqueous electrolyte secondary cell containing said mixture, non-aqueous electrolyte secondary cell provided with said negative electrode, and electrical device

The teachings herein are directed at a lithium secondary battery negative electrode active material consisting of a Sn Sb based sulfide that delivers a high electrode capacity density, excellent output characteristics, and excellent cycle life characteristics and also provide a method for manufacturing the lithium secondary battery negative electrode active material, said method being capable of easily manufacturing the high performance lithium secondary battery negative electrode active material at low cost without requiring a high-temperature processing step and special facilities as required in a glass melting method. The negative electrode active material preferably is prepared using a method that includes a step of obtaining a Sn Sb based sulfide precipitate by adding an alkali metal sulfide to a mixed solution of a tin halide and an antimony halide.

Lithium secondary battery negative electrode active material and method for manufacturing same

A binder for an electric double-layer capacitor electrode according to the present invention includes a copolymer of vinyl alcohol and an alkali metal-neutralized product of ethylene-unsaturated carboxylic acid.

Binder for electric double-layer capacitor electrode, electric double-layer capacitor electrode comprising same binder, electric double-layer capacitor using same electrode, and electric apparatus

An object of the present invention is to provide a positive-electrode active material comprising a carbon-sulfur structure which has Raman shift peaks at around 500 cm, at around 1,250 cmand at around 1,450 cmin a Raman spectrum, and by using the positive-electrode active material, it is possible to greatly improve cycling characteristics of a lithium-ion secondary battery.

Sulfur-based positive-electrode active material and lithium-ion secondary battery

Provided is a hydrogen storage alloy which is characterized in that two or more crystal phases having different crystal structures are layered in a c-axis direction of the crystal structures. The hydrogen storage alloy is further characterized in that a difference between a maximum value and a minimum value of a lattice constant a in the crystal structures of the laminated two or more crystal phases is 0.03 &#x212b; or less.

Hydrogen storage alloy, hydrogen storage alloy electrode, secondary battery, and method for producing hydrogen storage alloy

To provide a lithium ion secondary battery capable of suppressing thermal run-away when internal short circuiting occurs. The lithium ion secondary battery includes: a positive electrode including a current collector, a positive electrode active material layer that is formed on the current collector and that contains a lithium-containing complex oxide having a layered rock salt structure and being represented by general formula: LiNiCoMnDO(0.2&#x2266;a&#x2266;1; b+c+d+e=1; 0&#x2266;e&#x3c;1; D is at least one element selected from Li, Fe, Cr, Cu, Zn, Ca, Mg, S, Si, Na, K, and Al; 1.7&#x2266;f&#x2266;2.1), and a thermal run-away suppressing layer formed on the positive electrode active material layer and containing a lithium transition metal silicate; and a negative electrode including a negative electrode active material. A ratio of the mass of the lithium-containing complex oxide with respect to the mass of the lithium transition metal silicate in the positive electrode is not lower than 1.5.

Lithium ion secondary battery having positive electrode that comprises thermal run-away suppressing layer on positive electrode active material layer

Disclosed is a nickel positive electrode for a fiber battery having a long life duration, and also being enabling a high output and high capacity to be attained. For this purpose, the nickel positive electrode for a fiber battery is obtained by coating a carbon fiber with nickel, then causing a cathodic polarization in a nickel nitrate bath using the nickel-coated carbon fiber as a cathode, and then immersing the precipitate, which was deposited on the surface of the carbon fiber by the cathodic polarization, in an aqueous caustic alkali solution.

Nickel positive electrode for fiber battery

A lithium-ion secondary battery of the present invention comprises a positive electrode including a positive electrode active material composite formed by compositing a lithium silicate-based material and a carbon material, a negative electrode including a negative electrode active material containing a silicon, and an electrolyte. The lithium-ion secondary battery satisfies 0.8&#x3c;B/A&#x3c;1.2, where A is irreversible capacity of the positive electrode and B is irreversible capacity of the negative electrode.

Lithium-ion secondary battery and method for producing the same

Provided are a positive electrode active material for a sodium ion secondary battery, and a positive electrode and a sodium ion secondary battery using the material. The positive electrode active material for a sodium ion secondary battery comprises a lithium sodium-based compound containing lithium (Li), sodium (Na), iron (Fe), and oxygen (O).

Positive electrode active material for sodium ion secondary battery, positive electrode, and sodium ion secondary battery

Problem. Provided is a negative electrode material for a sodium secondary battery and its manufacturing method, and a negative electrode for a sodium secondary battery, and a sodium secondary battery, wherein the negative electrode material can have excellent cycle characteristics while maintaining high discharge capacity. Solution. A negative electrode material for a sodium secondary battery according to the present invention includes sulfide or sulfide composite body containing sulfur and antimony, and as necessary further includes the following component(s) of (i): (i) at least one or more element(s) selected from a group consisting of Sn, As, Bi, Ge, Ga, Pb, and C, wherein when a component(s) of (i) is included, the ratio of each of the above described components is sulfur: 10 to 70 mol %, antimony: 10 to 70 mol %, and (i): 3 to 60 mol %.

Negative electrode material for sodium secondary battery and method for producing same, negative electrode for sodium secondary batter, and sodium secondary battery

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Ikeda, Japan

Tetsuo Sakai