Nippon Telegraph and Telephone Corporation

Mikayo Iwata

Takeshi Komatsu

Masaya Nohara

Masahiko Hayashi

Shuhei Sakamoto

Hiroaki Taguchi

Yoko Ono

Hironobu Minowa

Yuzu Kobayashi

Yuya Uzumaki

Provided is a technique for a conductive paste having high conductivity and low cost. The conductive paste includes a conductive filler, a polymer, and a solvent, wherein the conductive filler includes co-continuous fibrous carbon having a three-dimensional network structure in which carbon is branched.

Conductive paste, conductive film, and method for producing conductive film

The performance of a bipolar type metal air battery is improved while a low environmental load is maintained. The bipolar type metal air battery includes a plurality of cells including air electrodes composed of a co-continuous component having a 3D network structure in which a plurality of nanostructures are integrated by non-covalent bonds, negative electrodes, and an electrolyte disposed between the air electrode and the negative electrode, and a current collector disposed between the plurality of cells, and the plurality of cells are electrically connected in series, and the current collector is in close contact with the negative electrode using a biodegradable material.

Bipolar metal-air battery, air electrode manufacturing method, and collector manufacturing method

A protein template is added to a solution in which metal ions of iron and copper are dissolved to introduce the metal ions into the protein template; the protein template is separated from metal ions that have not been incorporated in the protein template; the metal ions that have been incorporated in the protein template are reduced to obtain a protein containing alloy nanoparticles of iron and copper; a sol or gel in which a co-continuous body is dispersed is frozen; the frozen sol or gel is dried in a vacuum to obtain a porous body; the porous body is allowed to support the alloy nanoparticle containing protein; and the protein is removed.

Alloy nanoparticles loaded network structure and method for producing alloy nanoparticles loaded porous body

The present invention provides an air battery using oxygen in air as a cathode active material, the air battery comprising: a cylindrical anode made of a metal; a cathode constituted by a co-continuous body having a three dimensional network structure formed by an integrated plurality of nanostructures having branches; and a separator that is arranged between the cathode and the anode and absorbs an electrolytic solution, wherein: the cathode is arranged inside the anode via the separator; and the anode has an open hole that reaches the separator and constitutes a housing of the air battery.

Air battery and manufacturing method of positive electrode of air battery

A tilt sensor includes a notification unit adapted to provide notification about occurrence of tilt; a water storage chamber that contains an electrolytic solution; and a unit cell that includes a positive electrode, a negative electrode, and a separator placed between the positive electrode and the negative electrode. When the water storage chamber tilts, the electrolytic solution is injected into the separator and the unit cell starts generating power and supplies electric power needed to drive the notification unit.

Tilt sensor and detecting system

A battery performance of a metal-air battery is improved while still maintaining a low environmental burden. A metal-air battery includes an air electrode formed from a co-continuous substance having a three-dimensional network structure in which a plurality of nanostructures are integrated by noncovalent bonds; an anode; and an electrolyte disposed between the air electrode and the anode, in which the electrolyte is a gel electrolyte obtained by gelling an aqueous solution containing an ion conductor with a gelling agent, and the gelling agent is constituted of at least one of a plant-derived polysaccharide, a seaweed-derived polysaccharide, a microbial polysaccharide, an animal-derived polysaccharide, and a group of acetic acid bacteria that produce the polysaccharides.

Metal-air battery and production method for air electrode

There is provided an air battery including a first housings accommodating a base cell including a negative electrode, a positive electrode, and a separator disposed between the negative electrode and the positive electrode, and a second housing containing an electrolyte solution or water, in which the first housing and the negative electrode each have a hole leading to the separator, the second housing has a hole that is capable of being sealed, and the first housing and the second housing are disposed to face the hole of the first housing and the hole of the second housing each other.

Air battery and detection device

A battery includes a cathode (), an anode (), and an electrolyte (). The cathode () is made of a bicontinuous body having a three-dimensional network structure including a plurality of nanostructures. The electrolyte () is sandwiched between the cathode () and the anode () and made of a salt. The electrolyte () may be made of, e.g., an aqueous solution of one of potassium chloride and sodium chloride, or a mixture thereof. The anode () may contain, e.g., a metal selected from magnesium, zin, iron, and aluminum.

Battery and method of manufacturing cathode of the same

A metal-air battery includes: a cathode formed of a co-continuous body having a three dimensional network structure formed by an integrated plurality of nanostructures having branches; a foil- or plate-like anode formed of a metal; a separator that absorbs a liquid, which is to be an electrolytic solution; and a foil- or plate-like current collector formed of a metal. The metal-air battery is formed with a wound structure in which the current collector, the cathode, the separator, the anode, and the separator are superimposed and wound in this order.

Metal air battery, cathode manufacturing method of metal air battery and manufacturing method of metal air battery

A method includes a freezing process in which a solution or gel containing cellulose nanofibers is frozen to obtain a frozen component, a drying process in which the frozen component is dried in a vacuum to obtain a dry component, and a carbonizing process in which the dry component is heated and carbonized in a non-combustible atmosphere, and in the carbonizing process, the dry component is heated together with a reducing catalyst and also a material that generates a reducing gas by thermal decomposition.

Method for producing cellulose nanofiber carbon

Provided is an assembled battery in which a large number of flat batteries can be stacked easily. An assembled batteryincludes stacked multiple flat batteries A, B, and C in the shape of an N-sided polygon (N is an integer of 3 or more). Each of the multiple flat batteries A, B, and C in the shape of the N-sided polygon has a positive-electrode terminaland a negative-electrode terminalthat extend in different directions having 360&#xb0;/N in between, and the multiple flat batteries A, B, and C are electrically connected in series. The assembled batteryalso includes multiple N-sided polygonal separating filmsanddisposed between each pair of adjacent ones of the stacked multiple flat batteries A, B, and C to insulate the flat batteries from one another.

Assembled battery

A biological tissue transdermal patch houses a battery part and an active ingredient such that they do not come into contact with each other. For the use of the biological tissue transdermal patch, the battery part and the active ingredient are brought into contact to start battery reaction of the battery part and the battery part is attached to a biological tissue. Carbonized bacterial cellulose or cellulose nanofiber carbon is used for a positive electrode of the battery part.

Biological tissue transdermal patch

The sheet mask includes multiple battery parts arranged such that electric currents flow along mimic muscles or flows of lymph. This allows an active ingredient to penetrate into in-body tissues more effectively and also allows the mimic muscles and the lymphatic vessels to be electrically stimulated. Forming the battery parts by using materials with low environmental load allows easy disposal of the sheet mask in everyday life.

Sheet mask comprising a battery part

There is provided a method for manufacturing a bacterium-produced cellulose carbon having a sufficient specific surface area, and a high mechanical strength. The method manufactures a bacterium-produced cellulose carbon by carbonizing cellulose produced by thermally treating, and the method includes a cellulose forming step Sof forming bacterium- produced cellulose whereby cellulose nanofibers are dispersed using a bacterium; an impregnating step Sfor impregnating the bacterium-produced cellulose with a supercritical fluid; a drying step Sof vaporizing the supercritical fluid from the bacterium-produced cellulose containing the supercritical fluid and obtaining a dry product; and a carbonizing step Sof heating and carbonizing the dry product in an atmosphere not causing combustion of the dry product.

Method for manufacturing bacterium-produced cellulose carbon

Provided is a rechargeable lithium-air battery that improves charge-discharge energy efficiency and has good charge-discharge cycle performance. The rechargeable lithium-air battery includes: an air electrode including carbon; a negative electrode including metallic lithium or a lithium-containing substance; and an electrolyte in contact with the air electrode and the negative electrode. The electrolyte includes a salen-based metal complex and a quinone. The quinone includes any one or more of anthraquinone, 2,5-dihydroxy-1,4-benzoquinone, 7,7,8,8-tetracyanodimethane, 2,3-dichloro-5,6-dicyano-1,4-benzoquinone, tetrahydroxy-1,4-benzoquinone, and 2,5-di-tert-butyl-1,4-benzoquinone.

Growing community of inventors

Atsugi, Japan

Mikayo Iwata